Search | arXiv e-print repository

<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"/> <meta name="viewport" content="width=device-width, initial-scale=1"/>  <link rel="apple-touch-icon" sizes="180x180" href="https://static.arxiv.org/static/base/1.0.0a5/images/icons/apple-touch-icon.png"> <link rel="icon" type="image/png" sizes="32x32" href="https://static.arxiv.org/static/base/1.0.0a5/images/icons/favicon-32x32.png"> <link rel="icon" type="image/png" sizes="16x16" href="https://static.arxiv.org/static/base/1.0.0a5/images/icons/favicon-16x16.png"> <link rel="manifest" href="https://static.arxiv.org/static/base/1.0.0a5/images/icons/site.webmanifest"> <link rel="mask-icon" href="https://static.arxiv.org/static/base/1.0.0a5/images/icons/safari-pinned-tab.svg" color="#b31b1b"> <link rel="shortcut icon" href="https://static.arxiv.org/static/base/1.0.0a5/images/icons/favicon.ico"> <meta name="msapplication-TileColor" content="#b31b1b"> <meta name="msapplication-config" content="images/icons/browserconfig.xml"> <meta name="theme-color" content="#b31b1b">  <title>Search | arXiv e-print repository</title> <script defer src="https://static.arxiv.org/static/base/1.0.0a5/fontawesome-free-5.11.2-web/js/all.js"></script> <link rel="stylesheet" href="https://static.arxiv.org/static/base/1.0.0a5/css/arxivstyle.css" /> <script type="text/x-mathjax-config"> MathJax.Hub.Config({ messageStyle: "none", extensions: ["tex2jax.js"], jax: ["input/TeX", "output/HTML-CSS"], tex2jax: { inlineMath: [ ['$','$'], ["\$","\$"] ], displayMath: [ ['$$','$$'], ["\\[","\\]"] ], processEscapes: true, ignoreClass: '.*', processClass: 'mathjax.*' }, TeX: { extensions: ["AMSmath.js", "AMSsymbols.js", "noErrors.js"], noErrors: { inlineDelimiters: ["$","$"], multiLine: false, style: { "font-size": "normal", "border": "" } } }, "HTML-CSS": { availableFonts: ["TeX"] } }); </script> <script src='//static.arxiv.org/MathJax-2.7.3/MathJax.js'></script> <script src="https://static.arxiv.org/static/base/1.0.0a5/js/notification.js"></script> <link rel="stylesheet" href="https://static.arxiv.org/static/search/0.5.6/css/bulma-tooltip.min.css" /> <link rel="stylesheet" href="https://static.arxiv.org/static/search/0.5.6/css/search.css" /> <script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha256-k2WSCIexGzOj3Euiig+TlR8gA0EmPjuc79OEeY5L45g=" crossorigin="anonymous"></script> <script src="https://static.arxiv.org/static/search/0.5.6/js/fieldset.js"></script> <style> radio#cf-customfield_11400 { display: none; } </style> </head> <body> <header><a href="#main-container" class="is-sr-only">Skip to main content</a>  <div class="attribution level is-marginless" role="banner"> <div class="level-left"> <a class="level-item" href="https://cornell.edu/"><img src="https://static.arxiv.org/static/base/1.0.0a5/images/cornell-reduced-white-SMALL.svg" alt="Cornell University" width="200" aria-label="logo" /></a> </div> <div class="level-right is-marginless"><p class="sponsors level-item is-marginless"><span id="support-ack-url">We gratefully acknowledge support from<br /> the Simons Foundation, <a href="https://info.arxiv.org/about/ourmembers.html">member institutions</a>, and all contributors. <a href="https://info.arxiv.org/about/donate.html">Donate</a></span></p></div> </div>  <div class="identity level is-marginless"> <div class="level-left"> <div class="level-item"> <a class="arxiv" href="https://arxiv.org/" aria-label="arxiv-logo"> <img src="https://static.arxiv.org/static/base/1.0.0a5/images/arxiv-logo-one-color-white.svg" aria-label="logo" alt="arxiv logo" width="85" style="width:85px;"/> </a> </div> </div> <div class="search-block level-right"> <form class="level-item mini-search" method="GET" action="https://arxiv.org/search"> <div class="field has-addons"> <div class="control"> <input class="input is-small" type="text" name="query" placeholder="Search..." aria-label="Search term or terms" /> <p class="help"><a href="https://info.arxiv.org/help">Help</a> | <a href="https://arxiv.org/search/advanced">Advanced Search</a></p> </div> <div class="control"> <div class="select is-small"> <select name="searchtype" aria-label="Field to search"> <option value="all" selected="selected">All fields</option> <option value="title">Title</option> <option value="author">Author</option> <option value="abstract">Abstract</option> <option value="comments">Comments</option> <option value="journal_ref">Journal reference</option> <option value="acm_class">ACM classification</option> <option value="msc_class">MSC classification</option> <option value="report_num">Report number</option> <option value="paper_id">arXiv identifier</option> <option value="doi">DOI</option> <option value="orcid">ORCID</option> <option value="author_id">arXiv author ID</option> <option value="help">Help pages</option> <option value="full_text">Full text</option> </select> </div> </div> <input type="hidden" name="source" value="header"> <button class="button is-small is-cul-darker">Search</button> </div> </form> </div> </div>  <div class="container"> <div class="user-tools is-size-7 has-text-right has-text-weight-bold" role="navigation" aria-label="User menu"> <a href="https://arxiv.org/login">Login</a> </div> </div> </header> <main class="container" id="main-container"> <div class="level is-marginless"> <div class="level-left"> <h1 class="title is-clearfix"> Showing 1–20 of 20 results for author: <span class="mathjax">Driver, T</span> </h1> </div> <div class="level-right is-hidden-mobile">  <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search v0.5.6 released 2020-02-24</a>  </span> </div> </div> <div class="content"> <form method="GET" action="/search/physics" aria-role="search"> Searching in archive <strong>physics</strong>. <a href="/search/?searchtype=author&query=Driver%2C+T">Search in all archives.</a> <div class="field has-addons-tablet"> <div class="control is-expanded"> <label for="query" class="hidden-label">Search term or terms</label> <input class="input is-medium" id="query" name="query" placeholder="Search term..." type="text" value="Driver, T"> </div> <div class="select control is-medium"> <label class="is-hidden" for="searchtype">Field</label> <select class="is-medium" id="searchtype" name="searchtype"><option value="all">All fields</option><option value="title">Title</option><option selected value="author">Author(s)</option><option value="abstract">Abstract</option><option value="comments">Comments</option><option value="journal_ref">Journal reference</option><option value="acm_class">ACM classification</option><option value="msc_class">MSC classification</option><option value="report_num">Report number</option><option value="paper_id">arXiv identifier</option><option value="doi">DOI</option><option value="orcid">ORCID</option><option value="license">License (URI)</option><option value="author_id">arXiv author ID</option><option value="help">Help pages</option><option value="full_text">Full text</option></select> </div> <div class="control"> <button class="button is-link is-medium">Search</button> </div> </div> <div class="field"> <div class="control is-size-7"> <label class="radio"> <input checked id="abstracts-0" name="abstracts" type="radio" value="show"> Show abstracts </label> <label class="radio"> <input id="abstracts-1" name="abstracts" type="radio" value="hide"> Hide abstracts </label> </div> </div> <div class="is-clearfix" style="height: 2.5em"> <div class="is-pulled-right"> <a href="/search/advanced?terms-0-term=Driver%2C+T&terms-0-field=author&size=50&order=-announced_date_first">Advanced Search</a> </div> </div> <input type="hidden" name="order" value="-announced_date_first"> <input type="hidden" name="size" value="50"> </form> <div class="level breathe-horizontal"> <div class="level-left"> <form method="GET" action="/search/"> <div style="display: none;"> <select id="searchtype" name="searchtype"><option value="all">All fields</option><option value="title">Title</option><option selected value="author">Author(s)</option><option value="abstract">Abstract</option><option value="comments">Comments</option><option value="journal_ref">Journal reference</option><option value="acm_class">ACM classification</option><option value="msc_class">MSC classification</option><option value="report_num">Report number</option><option value="paper_id">arXiv identifier</option><option value="doi">DOI</option><option value="orcid">ORCID</option><option value="license">License (URI)</option><option value="author_id">arXiv author ID</option><option value="help">Help pages</option><option value="full_text">Full text</option></select> <input id="query" name="query" type="text" value="Driver, T"> <ul id="abstracts"><li><input checked id="abstracts-0" name="abstracts" type="radio" value="show"> <label for="abstracts-0">Show abstracts</label></li><li><input id="abstracts-1" name="abstracts" type="radio" value="hide"> <label for="abstracts-1">Hide abstracts</label></li></ul> </div> <div class="box field is-grouped is-grouped-multiline level-item"> <div class="control"> <span class="select is-small"> <select id="size" name="size"><option value="25">25</option><option selected value="50">50</option><option value="100">100</option><option value="200">200</option></select> </span> <label for="size">results per page</label>. </div> <div class="control"> <label for="order">Sort results by</label> <span class="select is-small"> <select id="order" name="order"><option selected value="-announced_date_first">Announcement date (newest first)</option><option value="announced_date_first">Announcement date (oldest first)</option><option value="-submitted_date">Submission date (newest first)</option><option value="submitted_date">Submission date (oldest first)</option><option value="">Relevance</option></select> </span> </div> <div class="control"> <button class="button is-small is-link">Go</button> </div> </div> </form> </div> </div> <ol class="breathe-horizontal" start="1"> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2411.01729">arXiv:2411.01729</a> <span> [<a href="https://arxiv.org/pdf/2411.01729">pdf</a>, <a href="https://arxiv.org/format/2411.01729">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Data Analysis, Statistics and Probability">physics.data-an</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </div> </div> <p class="title is-5 mathjax"> Covariance Analysis of Impulsive Streaking </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Wang%2C+J">Jun Wang</a>, <a href="/search/physics?searchtype=author&query=Guo%2C+Z">Zhaoheng Guo</a>, <a href="/search/physics?searchtype=author&query=Isele%2C+E">Erik Isele</a>, <a href="/search/physics?searchtype=author&query=Bucksbaum%2C+P+H">Philip H. Bucksbaum</a>, <a href="/search/physics?searchtype=author&query=Marinelli%2C+A">Agostino Marinelli</a>, <a href="/search/physics?searchtype=author&query=Cryan%2C+J+P">James P. Cryan</a>, <a href="/search/physics?searchtype=author&query=Driver%2C+T">Taran Driver</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2411.01729v1-abstract-short" style="display: inline;"> A comprehensive framework of modeling covariance in angular streaking experiments is presented. Within the impulsive streaking regime, the displacement of electron momentum distribution (MD) provides a tight connection between the dressing-free MD and the dressed MD. Such connection establishes universal structures in the composition of streaking covariance that are common across different MDs, re… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.01729v1-abstract-full').style.display = 'inline'; document.getElementById('2411.01729v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2411.01729v1-abstract-full" style="display: none;"> A comprehensive framework of modeling covariance in angular streaking experiments is presented. Within the impulsive streaking regime, the displacement of electron momentum distribution (MD) provides a tight connection between the dressing-free MD and the dressed MD. Such connection establishes universal structures in the composition of streaking covariance that are common across different MDs, regardless of their exact shape. Building on this robust framework, we have developed methods for retrieving temporal information from angular streaking measurements. By providing a detailed understanding of the covariance structure in angular streaking experiments, our work enables more accurate and robust temporal measurements in a wide range of experimental scenarios. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.01729v1-abstract-full').style.display = 'none'; document.getElementById('2411.01729v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 3 November, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">22 pages, 13 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2411.01700">arXiv:2411.01700</a> <span> [<a href="https://arxiv.org/pdf/2411.01700">pdf</a>, <a href="https://arxiv.org/format/2411.01700">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> </div> </div> <p class="title is-5 mathjax"> Attosecond Coherent Electron Motion in a Photoionized Aromatic Molecule </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Driver%2C+T">Taran Driver</a>, <a href="/search/physics?searchtype=author&query=Guo%2C+Z">Zhaoheng Guo</a>, <a href="/search/physics?searchtype=author&query=Isele%2C+E">Erik Isele</a>, <a href="/search/physics?searchtype=author&query=Grell%2C+G">Gilbert Grell</a>, <a href="/search/physics?searchtype=author&query=Ruberti%2C+M">Marco Ruberti</a>, <a href="/search/physics?searchtype=author&query=ONeal%2C+J+T">Jordan T. ONeal</a>, <a href="/search/physics?searchtype=author&query=Alexander%2C+O">Oliver Alexander</a>, <a href="/search/physics?searchtype=author&query=Beauvarlet%2C+S">Sandra Beauvarlet</a>, <a href="/search/physics?searchtype=author&query=Cesar%2C+D">David Cesar</a>, <a href="/search/physics?searchtype=author&query=Duris%2C+J">Joseph Duris</a>, <a href="/search/physics?searchtype=author&query=Garratt%2C+D">Douglas Garratt</a>, <a href="/search/physics?searchtype=author&query=Larsen%2C+K+A">Kirk A. Larsen</a>, <a href="/search/physics?searchtype=author&query=Li%2C+S">Siqi Li</a>, <a href="/search/physics?searchtype=author&query=Koloren%C4%8D%2C+P">P艡emysl Koloren膷</a>, <a href="/search/physics?searchtype=author&query=McCracken%2C+G+A">Gregory A. McCracken</a>, <a href="/search/physics?searchtype=author&query=Tuthill%2C+D">Daniel Tuthill</a>, <a href="/search/physics?searchtype=author&query=Wang%2C+Z">Zifan Wang</a>, <a href="/search/physics?searchtype=author&query=Berrah%2C+N">Nora Berrah</a>, <a href="/search/physics?searchtype=author&query=Bostedt%2C+C">Christoph Bostedt</a>, <a href="/search/physics?searchtype=author&query=Borne%2C+K">Kurtis Borne</a>, <a href="/search/physics?searchtype=author&query=Cheng%2C+X">Xinxin Cheng</a>, <a href="/search/physics?searchtype=author&query=DiMauro%2C+L+F">Louis F. DiMauro</a>, <a href="/search/physics?searchtype=author&query=Doumy%2C+G">Gilles Doumy</a>, <a href="/search/physics?searchtype=author&query=Franz%2C+P+L">Paris L. Franz</a>, <a href="/search/physics?searchtype=author&query=Kamalov%2C+A">Andrei Kamalov</a> , et al. (28 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2411.01700v1-abstract-short" style="display: inline;"> In molecular systems, the ultrafast motion of electrons initiates the process of chemical change. Tracking this electronic motion across molecules requires coupling attosecond time resolution to atomic-scale spatial sensitivity. In this work, we employ a pair of attosecond x-ray pulses from an x-ray free-electron laser to follow electron motion resulting from the sudden removal of an electron from… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.01700v1-abstract-full').style.display = 'inline'; document.getElementById('2411.01700v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2411.01700v1-abstract-full" style="display: none;"> In molecular systems, the ultrafast motion of electrons initiates the process of chemical change. Tracking this electronic motion across molecules requires coupling attosecond time resolution to atomic-scale spatial sensitivity. In this work, we employ a pair of attosecond x-ray pulses from an x-ray free-electron laser to follow electron motion resulting from the sudden removal of an electron from a prototypical aromatic system, para-aminophenol. X-ray absorption enables tracking this motion with atomic-site specificity. Our measurements are compared with state-of-the-art computational modeling, reproducing the observed response across multiple timescales. Sub-femtosecond dynamics are assigned to states undergoing non-radiative decay, while few-femtosecond oscillatory motion is associated with electronic wavepacket motion in stable cation states, that will eventually couple to nuclear motion. Our work provides insight on the ultrafast charge motion preceding and initiating chemical transformations in moderately complex systems, and provides a powerful benchmark for computational models of ultrafast charge motion in matter. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.01700v1-abstract-full').style.display = 'none'; document.getElementById('2411.01700v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 3 November, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2406.13083">arXiv:2406.13083</a> <span> [<a href="https://arxiv.org/pdf/2406.13083">pdf</a>, <a href="https://arxiv.org/format/2406.13083">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> Design and Performance of a Magnetic Bottle Electron Spectrometer for High-Energy Photoelectron Spectroscopy </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Borne%2C+K">Kurtis Borne</a>, <a href="/search/physics?searchtype=author&query=ONeal%2C+J+T">Jordan T ONeal</a>, <a href="/search/physics?searchtype=author&query=Wang%2C+J">Jun Wang</a>, <a href="/search/physics?searchtype=author&query=Isele%2C+E">Erk Isele</a>, <a href="/search/physics?searchtype=author&query=Obaid%2C+R">Razib Obaid</a>, <a href="/search/physics?searchtype=author&query=Berrah%2C+N">Nora Berrah</a>, <a href="/search/physics?searchtype=author&query=Cheng%2C+X">Xinxin Cheng</a>, <a href="/search/physics?searchtype=author&query=Bucksbaum%2C+P+H">Philip H Bucksbaum</a>, <a href="/search/physics?searchtype=author&query=James%2C+J">Justin James</a>, <a href="/search/physics?searchtype=author&query=Kamalov%2C+A">Andri Kamalov</a>, <a href="/search/physics?searchtype=author&query=Larsen%2C+K+A">Kirk A Larsen</a>, <a href="/search/physics?searchtype=author&query=Li%2C+X">Xiang Li</a>, <a href="/search/physics?searchtype=author&query=Lin%2C+M">Ming-Fu Lin</a>, <a href="/search/physics?searchtype=author&query=Liu%2C+Y">Yusong Liu</a>, <a href="/search/physics?searchtype=author&query=Marinelli%2C+A">Agostino Marinelli</a>, <a href="/search/physics?searchtype=author&query=Summers%2C+A">Adam Summers</a>, <a href="/search/physics?searchtype=author&query=Thierstein%2C+E">Emily Thierstein</a>, <a href="/search/physics?searchtype=author&query=Wolf%2C+T">Thomas Wolf</a>, <a href="/search/physics?searchtype=author&query=Rolles%2C+D">Daniel Rolles</a>, <a href="/search/physics?searchtype=author&query=Walter%2C+P">Peter Walter</a>, <a href="/search/physics?searchtype=author&query=Cryan%2C+J+P">James P Cryan</a>, <a href="/search/physics?searchtype=author&query=Driver%2C+T">Taran Driver</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2406.13083v2-abstract-short" style="display: inline;"> We describe the design and performance of a magnetic bottle electron spectrometer~(MBES) for high-energy electron spectroscopy. Our design features a ${\sim2}$~m long electron drift tube and electrostatic retardation lens, achieving sub-electronvolt (eV) electron kinetic energy resolution for high energy (several hundred eV) electrons with close to 4$蟺$ collection efficiency. A segmented anode… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.13083v2-abstract-full').style.display = 'inline'; document.getElementById('2406.13083v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2406.13083v2-abstract-full" style="display: none;"> We describe the design and performance of a magnetic bottle electron spectrometer~(MBES) for high-energy electron spectroscopy. Our design features a ${\sim2}$~m long electron drift tube and electrostatic retardation lens, achieving sub-electronvolt (eV) electron kinetic energy resolution for high energy (several hundred eV) electrons with close to 4$蟺$ collection efficiency. A segmented anode electron detector enables the simultaneous collection of photoelectron spectra in high resolution and high collection efficiency modes. This versatile instrument is installed at the TMO endstation at the LCLS x-ray free-electron laser (XFEL). In this paper, we demonstrate its high resolution, collection efficiency and spatial selectivity in measurements where it is coupled to an XFEL source. These combined characteristics are designed to enable high-resolution time-resolved measurements using x-ray photoelectron, absorption, and Auger-Meitner spectroscopy. We also describe the pervasive artifact in MBES time-of-flight spectra that arises from a periodic modulation in electron detection efficiency, and present a robust analysis procedure for its removal. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.13083v2-abstract-full').style.display = 'none'; document.getElementById('2406.13083v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 July, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 18 June, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2404.02299">arXiv:2404.02299</a> <span> [<a href="https://arxiv.org/pdf/2404.02299">pdf</a>, <a href="https://arxiv.org/format/2404.02299">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> </div> <p class="title is-5 mathjax"> "Beam `a la carte": laser heater shaping for attosecond pulses in a multiplexed x-ray free-electron laser </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Li%2C+S">Siqi Li</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+Z">Zhen Zhang</a>, <a href="/search/physics?searchtype=author&query=Alverson%2C+S">Shawn Alverson</a>, <a href="/search/physics?searchtype=author&query=Cesar%2C+D">David Cesar</a>, <a href="/search/physics?searchtype=author&query=Driver%2C+T">Taran Driver</a>, <a href="/search/physics?searchtype=author&query=Franz%2C+P">Paris Franz</a>, <a href="/search/physics?searchtype=author&query=Isele%2C+E">Erik Isele</a>, <a href="/search/physics?searchtype=author&query=Duris%2C+J+P">Joseph P. Duris</a>, <a href="/search/physics?searchtype=author&query=Larsen%2C+K">Kirk Larsen</a>, <a href="/search/physics?searchtype=author&query=Lin%2C+M">Ming-Fu Lin</a>, <a href="/search/physics?searchtype=author&query=Obaid%2C+R">Razib Obaid</a>, <a href="/search/physics?searchtype=author&query=O%27Neal%2C+J+T">Jordan T O'Neal</a>, <a href="/search/physics?searchtype=author&query=Robles%2C+R">River Robles</a>, <a href="/search/physics?searchtype=author&query=Sudar%2C+N">Nick Sudar</a>, <a href="/search/physics?searchtype=author&query=Guo%2C+Z">Zhaoheng Guo</a>, <a href="/search/physics?searchtype=author&query=Vetter%2C+S">Sharon Vetter</a>, <a href="/search/physics?searchtype=author&query=Walter%2C+P">Peter Walter</a>, <a href="/search/physics?searchtype=author&query=Wang%2C+A+L">Anna L. Wang</a>, <a href="/search/physics?searchtype=author&query=Xu%2C+J">Joseph Xu</a>, <a href="/search/physics?searchtype=author&query=Carbajo%2C+S">Sergio Carbajo</a>, <a href="/search/physics?searchtype=author&query=Cryan%2C+J+P">James P. Cryan</a>, <a href="/search/physics?searchtype=author&query=Marinelli%2C+A">Agostino Marinelli</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2404.02299v1-abstract-short" style="display: inline;"> Electron beam shaping allows the control of the temporal properties of x-ray free-electron laser pulses from femtosecond to attosecond timescales. Here we demonstrate the use of a laser heater to shape electron bunches and enable the generation of attosecond x-ray pulses. We demonstrate that this method can be applied in a selective way, shaping a targeted subset of bunches while leaving the remai… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.02299v1-abstract-full').style.display = 'inline'; document.getElementById('2404.02299v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2404.02299v1-abstract-full" style="display: none;"> Electron beam shaping allows the control of the temporal properties of x-ray free-electron laser pulses from femtosecond to attosecond timescales. Here we demonstrate the use of a laser heater to shape electron bunches and enable the generation of attosecond x-ray pulses. We demonstrate that this method can be applied in a selective way, shaping a targeted subset of bunches while leaving the remaining bunches unchanged. This experiment enables the delivery of shaped x-ray pulses to multiple undulator beamlines, with pulse properties tailored to specialized scientific applications. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.02299v1-abstract-full').style.display = 'none'; document.getElementById('2404.02299v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 2 April, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2403.02189">arXiv:2403.02189</a> <span> [<a href="https://arxiv.org/pdf/2403.02189">pdf</a>, <a href="https://arxiv.org/format/2403.02189">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Plasma Physics">physics.plasm-ph</span> </div> </div> <p class="title is-5 mathjax"> Spectrotemporal shaping of attosecond x-ray pulses with a fresh-slice free-electron laser </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Robles%2C+R+R">River R. Robles</a>, <a href="/search/physics?searchtype=author&query=Larsen%2C+K+A">Kirk A. Larsen</a>, <a href="/search/physics?searchtype=author&query=Cesar%2C+D">David Cesar</a>, <a href="/search/physics?searchtype=author&query=Driver%2C+T">Taran Driver</a>, <a href="/search/physics?searchtype=author&query=Duris%2C+J">Joseph Duris</a>, <a href="/search/physics?searchtype=author&query=Franz%2C+P">Paris Franz</a>, <a href="/search/physics?searchtype=author&query=Garratt%2C+D">Douglas Garratt</a>, <a href="/search/physics?searchtype=author&query=Sudar%2C+N">Nicholas Sudar</a>, <a href="/search/physics?searchtype=author&query=Wang%2C+J">Jun Wang</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+Z">Zhen Zhang</a>, <a href="/search/physics?searchtype=author&query=Cryan%2C+J">James Cryan</a>, <a href="/search/physics?searchtype=author&query=Marinelli%2C+A">Agostino Marinelli</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2403.02189v3-abstract-short" style="display: inline;"> We propose a scheme for coherently shaping attosecond x-ray pulses at free-electron lasers. We show that by seeding an FEL with a short coherent seed that overfills the amplification bandwidth, one can shape the wigner function of the pulse by controlling the undulator taper profile. The examples of controllable coherent pulse pairs and trains, as well as isolated spectrotemporally shaped pulses w… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2403.02189v3-abstract-full').style.display = 'inline'; document.getElementById('2403.02189v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2403.02189v3-abstract-full" style="display: none;"> We propose a scheme for coherently shaping attosecond x-ray pulses at free-electron lasers. We show that by seeding an FEL with a short coherent seed that overfills the amplification bandwidth, one can shape the wigner function of the pulse by controlling the undulator taper profile. The examples of controllable coherent pulse pairs and trains, as well as isolated spectrotemporally shaped pulses with very broad coherent bandwidths are examined in detail. Existing attosecond XFELs can achieve these experimental conditions in a two-stage cascade, in which the coherent seed is generated by a short current spike in an electron bunch and shaped in an unspoiled region within the same bunch. We experimentally demonstrate the production of pulse pairs using this method at the Linac Coherent Light Source. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2403.02189v3-abstract-full').style.display = 'none'; document.getElementById('2403.02189v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 13 September, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 4 March, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2402.17685">arXiv:2402.17685</a> <span> [<a href="https://arxiv.org/pdf/2402.17685">pdf</a>, <a href="https://arxiv.org/format/2402.17685">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> </div> </div> <p class="title is-5 mathjax"> Attosecond X-ray Chronoscopy of Core-level Photoemission </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Ji%2C+J">Jia-Bao Ji</a>, <a href="/search/physics?searchtype=author&query=Guo%2C+Z">Zhaoheng Guo</a>, <a href="/search/physics?searchtype=author&query=Driver%2C+T">Taran Driver</a>, <a href="/search/physics?searchtype=author&query=Trevisan%2C+C+S">Cynthia S. Trevisan</a>, <a href="/search/physics?searchtype=author&query=Cesar%2C+D">David Cesar</a>, <a href="/search/physics?searchtype=author&query=Cheng%2C+X">Xinxin Cheng</a>, <a href="/search/physics?searchtype=author&query=Duris%2C+J">Joseph Duris</a>, <a href="/search/physics?searchtype=author&query=Franz%2C+P+L">Paris L. Franz</a>, <a href="/search/physics?searchtype=author&query=Glownia%2C+J">James Glownia</a>, <a href="/search/physics?searchtype=author&query=Gong%2C+X">Xiaochun Gong</a>, <a href="/search/physics?searchtype=author&query=Hammerland%2C+D">Daniel Hammerland</a>, <a href="/search/physics?searchtype=author&query=Han%2C+M">Meng Han</a>, <a href="/search/physics?searchtype=author&query=Heck%2C+S">Saijoscha Heck</a>, <a href="/search/physics?searchtype=author&query=Hoffmann%2C+M">Matthias Hoffmann</a>, <a href="/search/physics?searchtype=author&query=Kamalov%2C+A">Andrei Kamalov</a>, <a href="/search/physics?searchtype=author&query=Larsen%2C+K+A">Kirk A. Larsen</a>, <a href="/search/physics?searchtype=author&query=Li%2C+X">Xiang Li</a>, <a href="/search/physics?searchtype=author&query=Lin%2C+M">Ming-Fu Lin</a>, <a href="/search/physics?searchtype=author&query=Liu%2C+Y">Yuchen Liu</a>, <a href="/search/physics?searchtype=author&query=McCurdy%2C+C+W">C. William McCurdy</a>, <a href="/search/physics?searchtype=author&query=Obaid%2C+R">Razib Obaid</a>, <a href="/search/physics?searchtype=author&query=ONeal%2C+J+T">Jordan T. ONeal</a>, <a href="/search/physics?searchtype=author&query=Rescigno%2C+T+N">Thomas N. Rescigno</a>, <a href="/search/physics?searchtype=author&query=Robles%2C+R+R">River R. Robles</a>, <a href="/search/physics?searchtype=author&query=Sudar%2C+N">Nicholas Sudar</a> , et al. (10 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2402.17685v3-abstract-short" style="display: inline;"> Attosecond photoemission or photoionization delays are a unique probe of the structure and the electronic dynamics of matter. However, spectral congestion and spatial delocalization of valence electron wave functions set fundamental limits to the complexity of systems that can be studied and the information that can be retrieved, respectively. Using attosecond X-ray pulses from LCLS, we demonstrat… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2402.17685v3-abstract-full').style.display = 'inline'; document.getElementById('2402.17685v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2402.17685v3-abstract-full" style="display: none;"> Attosecond photoemission or photoionization delays are a unique probe of the structure and the electronic dynamics of matter. However, spectral congestion and spatial delocalization of valence electron wave functions set fundamental limits to the complexity of systems that can be studied and the information that can be retrieved, respectively. Using attosecond X-ray pulses from LCLS, we demonstrate the key advantages of measuring core-level delays: the photoelectron spectra remain atom-like, the measurements become element specific and the observed scattering dynamics originate from a point-like source. We exploit these unique features to reveal the effects of electronegativity and symmetry on attosecond scattering dynamics by measuring the photoionization delays between N-1s and C-1s core shells of a series of aromatic azabenzene molecules. Remarkably, the delays systematically increase with the number of nitrogen atoms in the molecule and reveal multiple resonances. We identify two previously unknown mechanisms regulating the associated attosecond dynamics, namely the enhanced confinement of the trapped wavefunction with increasing electronegativity of the atoms and the decrease of the coupling strength among the photoemitted partial waves with increasing symmetry. This study demonstrates the unique opportunities opened by measurements of core-level photoionization delays for unravelling attosecond electron dynamics in complex matter. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2402.17685v3-abstract-full').style.display = 'none'; document.getElementById('2402.17685v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 8 April, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 27 February, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2402.12764">arXiv:2402.12764</a> <span> [<a href="https://arxiv.org/pdf/2402.12764">pdf</a>, <a href="https://arxiv.org/format/2402.12764">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> </div> </div> <p class="title is-5 mathjax"> Attosecond Delays in X-ray Molecular Ionization </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Driver%2C+T">Taran Driver</a>, <a href="/search/physics?searchtype=author&query=Mountney%2C+M">Miles Mountney</a>, <a href="/search/physics?searchtype=author&query=Wang%2C+J">Jun Wang</a>, <a href="/search/physics?searchtype=author&query=Ortmann%2C+L">Lisa Ortmann</a>, <a href="/search/physics?searchtype=author&query=Al-Haddad%2C+A">Andre Al-Haddad</a>, <a href="/search/physics?searchtype=author&query=Berrah%2C+N">Nora Berrah</a>, <a href="/search/physics?searchtype=author&query=Bostedt%2C+C">Christoph Bostedt</a>, <a href="/search/physics?searchtype=author&query=Champenois%2C+E+G">Elio G. Champenois</a>, <a href="/search/physics?searchtype=author&query=DiMauro%2C+L+F">Louis F. DiMauro</a>, <a href="/search/physics?searchtype=author&query=Duris%2C+J">Joseph Duris</a>, <a href="/search/physics?searchtype=author&query=Garratt%2C+D">Douglas Garratt</a>, <a href="/search/physics?searchtype=author&query=Glownia%2C+J+M">James M. Glownia</a>, <a href="/search/physics?searchtype=author&query=Guo%2C+Z">Zhaoheng Guo</a>, <a href="/search/physics?searchtype=author&query=Haxton%2C+D">Daniel Haxton</a>, <a href="/search/physics?searchtype=author&query=Isele%2C+E">Erik Isele</a>, <a href="/search/physics?searchtype=author&query=Ivanov%2C+I">Igor Ivanov</a>, <a href="/search/physics?searchtype=author&query=Ji%2C+J">Jiabao Ji</a>, <a href="/search/physics?searchtype=author&query=Kamalov%2C+A">Andrei Kamalov</a>, <a href="/search/physics?searchtype=author&query=Li%2C+S">Siqi Li</a>, <a href="/search/physics?searchtype=author&query=Lin%2C+M">Ming-Fu Lin</a>, <a href="/search/physics?searchtype=author&query=Marangos%2C+J+P">Jon P. Marangos</a>, <a href="/search/physics?searchtype=author&query=Obaid%2C+R">Razib Obaid</a>, <a href="/search/physics?searchtype=author&query=O%27Neal%2C+J+T">Jordan T. O'Neal</a>, <a href="/search/physics?searchtype=author&query=Rosenberger%2C+P">Philipp Rosenberger</a>, <a href="/search/physics?searchtype=author&query=Shivaram%2C+N+H">Niranjan H. Shivaram</a> , et al. (12 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2402.12764v1-abstract-short" style="display: inline;"> The photoelectric effect is not truly instantaneous, but exhibits attosecond delays that can reveal complex molecular dynamics. Sub-femtosecond duration light pulses provide the requisite tools to resolve the dynamics of photoionization. Accordingly, the past decade has produced a large volume of work on photoionization delays following single photon absorption of an extreme ultraviolet (XUV) phot… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2402.12764v1-abstract-full').style.display = 'inline'; document.getElementById('2402.12764v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2402.12764v1-abstract-full" style="display: none;"> The photoelectric effect is not truly instantaneous, but exhibits attosecond delays that can reveal complex molecular dynamics. Sub-femtosecond duration light pulses provide the requisite tools to resolve the dynamics of photoionization. Accordingly, the past decade has produced a large volume of work on photoionization delays following single photon absorption of an extreme ultraviolet (XUV) photon. However, the measurement of time-resolved core-level photoionization remained out of reach. The required x-ray photon energies needed for core-level photoionization were not available with attosecond tabletop sources. We have now measured the x-ray photoemission delay of core-level electrons, and here report unexpectedly large delays, ranging up to 700 attoseconds in NO near the oxygen K-shell threshold. These measurements exploit attosecond soft x-ray pulses from a free-electron laser (XFEL) to scan across the entire region near the K-shell threshold. Furthermore, we find the delay spectrum is richly modulated, suggesting several contributions including transient trapping of the photoelectron due to shape resonances, collisions with the Auger-Meitner electron that is emitted in the rapid non-radiative relaxation of the molecule, and multi-electron scattering effects. The results demonstrate how x-ray attosecond experiments, supported by comprehensive theoretical modelling, can unravel the complex correlated dynamics of core-level photoionization. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2402.12764v1-abstract-full').style.display = 'none'; document.getElementById('2402.12764v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 February, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2401.15250">arXiv:2401.15250</a> <span> [<a href="https://arxiv.org/pdf/2401.15250">pdf</a>, <a href="https://arxiv.org/format/2401.15250">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> </div> </div> <p class="title is-5 mathjax"> Experimental Demonstration of Attosecond Pump-Probe Spectroscopy with an X-ray Free-Electron Laser </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Guo%2C+Z">Zhaoheng Guo</a>, <a href="/search/physics?searchtype=author&query=Driver%2C+T">Taran Driver</a>, <a href="/search/physics?searchtype=author&query=Beauvarlet%2C+S">Sandra Beauvarlet</a>, <a href="/search/physics?searchtype=author&query=Cesar%2C+D">David Cesar</a>, <a href="/search/physics?searchtype=author&query=Duris%2C+J">Joseph Duris</a>, <a href="/search/physics?searchtype=author&query=Franz%2C+P+L">Paris L. Franz</a>, <a href="/search/physics?searchtype=author&query=Alexander%2C+O">Oliver Alexander</a>, <a href="/search/physics?searchtype=author&query=Bohler%2C+D">Dorian Bohler</a>, <a href="/search/physics?searchtype=author&query=Bostedt%2C+C">Christoph Bostedt</a>, <a href="/search/physics?searchtype=author&query=Averbukh%2C+V">Vitali Averbukh</a>, <a href="/search/physics?searchtype=author&query=Cheng%2C+X">Xinxin Cheng</a>, <a href="/search/physics?searchtype=author&query=DiMauro%2C+L+F">Louis F. DiMauro</a>, <a href="/search/physics?searchtype=author&query=Doumy%2C+G">Gilles Doumy</a>, <a href="/search/physics?searchtype=author&query=Forbes%2C+R">Ruaridh Forbes</a>, <a href="/search/physics?searchtype=author&query=Gessner%2C+O">Oliver Gessner</a>, <a href="/search/physics?searchtype=author&query=Glownia%2C+J+M">James M. Glownia</a>, <a href="/search/physics?searchtype=author&query=Isele%2C+E">Erik Isele</a>, <a href="/search/physics?searchtype=author&query=Kamalov%2C+A">Andrei Kamalov</a>, <a href="/search/physics?searchtype=author&query=Larsen%2C+K+A">Kirk A. Larsen</a>, <a href="/search/physics?searchtype=author&query=Li%2C+S">Siqi Li</a>, <a href="/search/physics?searchtype=author&query=Li%2C+X">Xiang Li</a>, <a href="/search/physics?searchtype=author&query=Lin%2C+M">Ming-Fu Lin</a>, <a href="/search/physics?searchtype=author&query=McCracken%2C+G+A">Gregory A. McCracken</a>, <a href="/search/physics?searchtype=author&query=Obaid%2C+R">Razib Obaid</a>, <a href="/search/physics?searchtype=author&query=ONeal%2C+J+T">Jordan T. ONeal</a> , et al. (25 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2401.15250v1-abstract-short" style="display: inline;"> Pump-probe experiments with sub-femtosecond resolution are the key to understanding electronic dynamics in quantum systems. Here we demonstrate the generation and control of sub-femtosecond pulse pairs from a two-colour X-ray free-electron laser (XFEL). By measuring the delay between the two pulses with an angular streaking diagnostic, we characterise the group velocity of the XFEL and demonstrate… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2401.15250v1-abstract-full').style.display = 'inline'; document.getElementById('2401.15250v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2401.15250v1-abstract-full" style="display: none;"> Pump-probe experiments with sub-femtosecond resolution are the key to understanding electronic dynamics in quantum systems. Here we demonstrate the generation and control of sub-femtosecond pulse pairs from a two-colour X-ray free-electron laser (XFEL). By measuring the delay between the two pulses with an angular streaking diagnostic, we characterise the group velocity of the XFEL and demonstrate control of the pulse delay down to 270 as. We demonstrate the application of this technique to a pump-probe measurement in core-excited para-aminophenol. These results demonstrate the ability to perform pump-probe experiments with sub-femtosecond resolution and atomic site specificity. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2401.15250v1-abstract-full').style.display = 'none'; document.getElementById('2401.15250v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 January, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">55 pages, main manuscript (5 figures) + supplementary materials (25 figures), 30 figures total. Submitted to Nature Photonics</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2311.14751">arXiv:2311.14751</a> <span> [<a href="https://arxiv.org/pdf/2311.14751">pdf</a>, <a href="https://arxiv.org/format/2311.14751">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </div> </div> <p class="title is-5 mathjax"> Efficient prediction of attosecond two-colour pulses from an X-ray free-electron laser with machine learning </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=El-Din%2C+K+K+A">Karim K. Alaa El-Din</a>, <a href="/search/physics?searchtype=author&query=Alexander%2C+O+G">Oliver G. Alexander</a>, <a href="/search/physics?searchtype=author&query=Frasinski%2C+L+J">Leszek J. Frasinski</a>, <a href="/search/physics?searchtype=author&query=Mintert%2C+F">Florian Mintert</a>, <a href="/search/physics?searchtype=author&query=Guo%2C+Z">Zhaoheng Guo</a>, <a href="/search/physics?searchtype=author&query=Duris%2C+J">Joseph Duris</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+Z">Zhen Zhang</a>, <a href="/search/physics?searchtype=author&query=Cesar%2C+D+B">David B. Cesar</a>, <a href="/search/physics?searchtype=author&query=Franz%2C+P">Paris Franz</a>, <a href="/search/physics?searchtype=author&query=Driver%2C+T">Taran Driver</a>, <a href="/search/physics?searchtype=author&query=Walter%2C+P">Peter Walter</a>, <a href="/search/physics?searchtype=author&query=Cryan%2C+J+P">James P. Cryan</a>, <a href="/search/physics?searchtype=author&query=Marinelli%2C+A">Agostino Marinelli</a>, <a href="/search/physics?searchtype=author&query=Marangos%2C+J+P">Jon P. Marangos</a>, <a href="/search/physics?searchtype=author&query=Mukherjee%2C+R">Rick Mukherjee</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2311.14751v3-abstract-short" style="display: inline;"> X-ray free-electron lasers are sources of coherent, high-intensity X-rays with numerous applications in ultra-fast measurements and dynamic structural imaging. Due to the stochastic nature of the self-amplified spontaneous emission process and the difficulty in controlling injection of electrons, output pulses exhibit significant noise and limited temporal coherence. Standard measurement technique… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.14751v3-abstract-full').style.display = 'inline'; document.getElementById('2311.14751v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2311.14751v3-abstract-full" style="display: none;"> X-ray free-electron lasers are sources of coherent, high-intensity X-rays with numerous applications in ultra-fast measurements and dynamic structural imaging. Due to the stochastic nature of the self-amplified spontaneous emission process and the difficulty in controlling injection of electrons, output pulses exhibit significant noise and limited temporal coherence. Standard measurement techniques used for characterizing two-coloured X-ray pulses are challenging, as they are either invasive or diagnostically expensive. In this work, we employ machine learning methods such as neural networks and decision trees to predict the central photon energies of pairs of attosecond fundamental and second harmonic pulses using parameters that are easily recorded at the high-repetition rate of a single shot. Using real experimental data, we apply a detailed feature analysis on the input parameters while optimizing the training time of the machine learning methods. Our predictive models are able to make predictions of central photon energy for one of the pulses without measuring the other pulse, thereby leveraging the use of the spectrometer without having to extend its detection window. We anticipate applications in X-ray spectroscopy using XFELs, such as in time-resolved X-ray absorption and photoemission spectroscopy, where improved measurement of input spectra will lead to better experimental outcomes. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.14751v3-abstract-full').style.display = 'none'; document.getElementById('2311.14751v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 March, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 November, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">14 pages, 8 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2305.05169">arXiv:2305.05169</a> <span> [<a href="https://arxiv.org/pdf/2305.05169">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </div> </div> <p class="title is-5 mathjax"> A compact single-shot soft X-ray photon spectrometer for free electron laser diagnostics </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Larsen%2C+K+A">Kirk A. Larsen</a>, <a href="/search/physics?searchtype=author&query=Borne%2C+K">Kurtis Borne</a>, <a href="/search/physics?searchtype=author&query=Obaid%2C+R">Razib Obaid</a>, <a href="/search/physics?searchtype=author&query=Kamalov%2C+A">Andrei Kamalov</a>, <a href="/search/physics?searchtype=author&query=Liu%2C+Y">Yusong Liu</a>, <a href="/search/physics?searchtype=author&query=Cheng%2C+X">Xinxin Cheng</a>, <a href="/search/physics?searchtype=author&query=James%2C+J">Justin James</a>, <a href="/search/physics?searchtype=author&query=Driver%2C+T">Taran Driver</a>, <a href="/search/physics?searchtype=author&query=Li%2C+K">Kenan Li</a>, <a href="/search/physics?searchtype=author&query=Liu%2C+Y">Yanwei Liu</a>, <a href="/search/physics?searchtype=author&query=Sakdinawat%2C+A">Anne Sakdinawat</a>, <a href="/search/physics?searchtype=author&query=David%2C+C">Christian David</a>, <a href="/search/physics?searchtype=author&query=Wolf%2C+T+J+A">Thomas J. A. Wolf</a>, <a href="/search/physics?searchtype=author&query=Cryan%2C+J">James Cryan</a>, <a href="/search/physics?searchtype=author&query=Walter%2C+P">Peter Walter</a>, <a href="/search/physics?searchtype=author&query=Lin%2C+M">Ming-Fu Lin</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2305.05169v1-abstract-short" style="display: inline;"> The photon spectrum from free-electron laser (FEL) light sources offers valuable information in time-resolved experiments and machine optimization in the spectral and temporal domains. We have developed a compact single-shot photon spectrometer to diagnose soft X-ray spectra. The spectrometer consists of an array of off-axis Fresnel zone plates (FZP) that act as transmission-imaging gratings, a Ce… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.05169v1-abstract-full').style.display = 'inline'; document.getElementById('2305.05169v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2305.05169v1-abstract-full" style="display: none;"> The photon spectrum from free-electron laser (FEL) light sources offers valuable information in time-resolved experiments and machine optimization in the spectral and temporal domains. We have developed a compact single-shot photon spectrometer to diagnose soft X-ray spectra. The spectrometer consists of an array of off-axis Fresnel zone plates (FZP) that act as transmission-imaging gratings, a Ce-YAG scintillator, and a microscope objective to image the scintillation target onto a two-dimensional imaging detector. This spectrometer operates in an energy range which covers absorption edges associated with several atomic constituents carbon, nitrogen, oxygen, and neon. The spectrometer's performance is demonstrated at a repetition rate of 120 Hz, but our detection scheme can be easily extended to 200 kHz spectral collection by employing a fast complementary metal oxide semiconductor (CMOS) line-scan camera to detect the light from the scintillator. This compact photon spectrometer provides an opportunity for monitoring the spectrum downstream of an endstation in a limited space environment with subelectronvolt energy resolution. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.05169v1-abstract-full').style.display = 'none'; document.getElementById('2305.05169v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 9 May, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">14 pages, 5 figures, 1 table</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2302.07095">arXiv:2302.07095</a> <span> [<a href="https://arxiv.org/pdf/2302.07095">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevA.107.063111">10.1103/PhysRevA.107.063111 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Streaking single-electron ionization in open-shell molecules driven by X-ray pulses </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Mountney%2C+M+E">M. E. Mountney</a>, <a href="/search/physics?searchtype=author&query=Driver%2C+T+C">T. C. Driver</a>, <a href="/search/physics?searchtype=author&query=Marinelli%2C+A">A. Marinelli</a>, <a href="/search/physics?searchtype=author&query=Kling%2C+M+F">M. F. Kling</a>, <a href="/search/physics?searchtype=author&query=Cryan%2C+J+P">J. P. Cryan</a>, <a href="/search/physics?searchtype=author&query=Emmanouilidou%2C+A">A. Emmanouilidou</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2302.07095v2-abstract-short" style="display: inline;"> We obtain continuum molecular wavefunctions for open-shell molecules in the Hartree-Fock framework. We do so while accounting for the singlet or triplet total spin symmetry of the molecular ion, that is, of the open-shell orbital and the initial orbital where the electron ionizes from. Using these continuum wavefunctions, we obtain the dipole matrix elements for a core electron that ionizes due to… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2302.07095v2-abstract-full').style.display = 'inline'; document.getElementById('2302.07095v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2302.07095v2-abstract-full" style="display: none;"> We obtain continuum molecular wavefunctions for open-shell molecules in the Hartree-Fock framework. We do so while accounting for the singlet or triplet total spin symmetry of the molecular ion, that is, of the open-shell orbital and the initial orbital where the electron ionizes from. Using these continuum wavefunctions, we obtain the dipole matrix elements for a core electron that ionizes due to single-photon absorption by a linearly polarized X-ray pulse. After ionization from the X-ray pulse, we control or streak the electron dynamics using a circularly polarized infrared (IR) pulse. For a high intensity IR pulse and photon energies of the X-ray pulse close to the ionization threshold of the $1蟽$ or $2蟽$ orbitals, we achieve control of the angle of escape of the ionizing electron by varying the phase delay between the X-ray and IR pulses. For a low intensity IR pulse, we obtain final electron momenta distributions on the plane of the IR pulse and we find that many features of these distributions correspond to the angular patterns of electron escape solely due to the X-ray pulse. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2302.07095v2-abstract-full').style.display = 'none'; document.getElementById('2302.07095v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 3 July, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 14 February, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">12 pages, 7 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2210.09480">arXiv:2210.09480</a> <span> [<a href="https://arxiv.org/pdf/2210.09480">pdf</a>, <a href="https://arxiv.org/format/2210.09480">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Data Analysis, Statistics and Probability">physics.data-an</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1367-2630/acc201">10.1088/1367-2630/acc201 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Photon Energy-Resolved Velocity Map Imaging from Spectral Domain Ghost Imaging </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Wang%2C+J">Jun Wang</a>, <a href="/search/physics?searchtype=author&query=Driver%2C+T+C">Taran C. Driver</a>, <a href="/search/physics?searchtype=author&query=Allum%2C+F">Felix Allum</a>, <a href="/search/physics?searchtype=author&query=Papadopoulou%2C+C+C">Christina C. Papadopoulou</a>, <a href="/search/physics?searchtype=author&query=Passow%2C+C">Christopher Passow</a>, <a href="/search/physics?searchtype=author&query=Brenner%2C+G">G眉nter Brenner</a>, <a href="/search/physics?searchtype=author&query=Li%2C+S">Siqi Li</a>, <a href="/search/physics?searchtype=author&query=D%C3%BCsterer%2C+S">Stefan D眉sterer</a>, <a href="/search/physics?searchtype=author&query=Noor%2C+A+T">Atia Tul Noor</a>, <a href="/search/physics?searchtype=author&query=Kumar%2C+S">Sonu Kumar</a>, <a href="/search/physics?searchtype=author&query=Bucksbaum%2C+P+H">Philip H. Bucksbaum</a>, <a href="/search/physics?searchtype=author&query=Erk%2C+B">Benjamin Erk</a>, <a href="/search/physics?searchtype=author&query=Forbes%2C+R">Ruaridh Forbes</a>, <a href="/search/physics?searchtype=author&query=Cryan%2C+J+P">James P. Cryan</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2210.09480v2-abstract-short" style="display: inline;"> We present an approach that combines photon spectrum correlation analysis with the reconstruction of three-dimensional momentum distribution from velocity map images in an efficient, single-step procedure. We demonstrate its efficacy with the results from the photoionization of the $2p$-shell of argon using the FLASH free-electron laser~(FEL). Distinct spectral features due to the spin-orbit split… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2210.09480v2-abstract-full').style.display = 'inline'; document.getElementById('2210.09480v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2210.09480v2-abstract-full" style="display: none;"> We present an approach that combines photon spectrum correlation analysis with the reconstruction of three-dimensional momentum distribution from velocity map images in an efficient, single-step procedure. We demonstrate its efficacy with the results from the photoionization of the $2p$-shell of argon using the FLASH free-electron laser~(FEL). Distinct spectral features due to the spin-orbit splitting of Ar$^+(2p^{-1})$ are resolved, despite the large average bandwidth of the ionizing pulses from the FEL. This demonstrates a clear advantage over the conventional analysis method, and it will be broadly beneficial for velocity map imaging experiments with FEL sources. The retrieved linewidth of the binding energy spectrum approaches the resolution limitation prescribed by the spectrometers used to collect the data. Our approach presents a path to extend spectral-domain ghost imaging to the case where the photoproduct observable is high-dimensional. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2210.09480v2-abstract-full').style.display = 'none'; document.getElementById('2210.09480v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 March, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 17 October, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">14 pages</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> New J. Phys. 25 033017 (2023) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2112.00863">arXiv:2112.00863</a> <span> [<a href="https://arxiv.org/pdf/2112.00863">pdf</a>, <a href="https://arxiv.org/format/2112.00863">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1107/S1600577522004283">10.1107/S1600577522004283 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The Time-resolved Atomic, Molecular and Optical Science Instrument at the Linac Coherent Light Source </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Walter%2C+P">Peter Walter</a>, <a href="/search/physics?searchtype=author&query=Osipov%2C+T">Timur Osipov</a>, <a href="/search/physics?searchtype=author&query=Lin%2C+M">Ming-Fu Lin</a>, <a href="/search/physics?searchtype=author&query=Cryan%2C+J">James Cryan</a>, <a href="/search/physics?searchtype=author&query=Driver%2C+T">Taran Driver</a>, <a href="/search/physics?searchtype=author&query=Kamalov%2C+A">Andrei Kamalov</a>, <a href="/search/physics?searchtype=author&query=Marinelli%2C+A">Agostino Marinelli</a>, <a href="/search/physics?searchtype=author&query=Robinson%2C+J">Joe Robinson</a>, <a href="/search/physics?searchtype=author&query=Seaberg%2C+M">Matt Seaberg</a>, <a href="/search/physics?searchtype=author&query=Wolf%2C+T+J+A">Thomas J. A. Wolf</a>, <a href="/search/physics?searchtype=author&query=Aldrich%2C+J">Jeff Aldrich</a>, <a href="/search/physics?searchtype=author&query=Brown%2C+N">Nolan Brown</a>, <a href="/search/physics?searchtype=author&query=Champenois%2C+E+G">Elio G. Champenois</a>, <a href="/search/physics?searchtype=author&query=Cheng%2C+X">Xinxin Cheng</a>, <a href="/search/physics?searchtype=author&query=Cocco%2C+D">Daniele Cocco</a>, <a href="/search/physics?searchtype=author&query=Conder%2C+A">Alan Conder</a>, <a href="/search/physics?searchtype=author&query=Curiel%2C+I">Ivan Curiel</a>, <a href="/search/physics?searchtype=author&query=Egger%2C+A">Adam Egger</a>, <a href="/search/physics?searchtype=author&query=Glownia%2C+J+M">James M. Glownia</a>, <a href="/search/physics?searchtype=author&query=Heimann%2C+P">Philip Heimann</a>, <a href="/search/physics?searchtype=author&query=Holmes%2C+M">Michael Holmes</a>, <a href="/search/physics?searchtype=author&query=Johnson%2C+T">Tyler Johnson</a>, <a href="/search/physics?searchtype=author&query=Li%2C+X">Xiang Li</a>, <a href="/search/physics?searchtype=author&query=Moeller%2C+S">Stefan Moeller</a>, <a href="/search/physics?searchtype=author&query=Morton%2C+D">DanielS Morton</a> , et al. (17 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2112.00863v1-abstract-short" style="display: inline;"> The newly constructed Time-resolved atomic, Molecular and Optical science instrument (TMO), is configured to take full advantage of both linear accelerators at SLAC National Accelerator Laboratory, the copper accelerator operating at a repetition rate of 120 Hz providing high per pulse energy, as well as the superconducting accelerator operating at a repetition rate of about 1 MHz providing high a… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2112.00863v1-abstract-full').style.display = 'inline'; document.getElementById('2112.00863v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2112.00863v1-abstract-full" style="display: none;"> The newly constructed Time-resolved atomic, Molecular and Optical science instrument (TMO), is configured to take full advantage of both linear accelerators at SLAC National Accelerator Laboratory, the copper accelerator operating at a repetition rate of 120 Hz providing high per pulse energy, as well as the superconducting accelerator operating at a repetition rate of about 1 MHz providing high average intensity. Both accelerators build a soft X-ray free electron laser with the new variable gab undulator section. With this flexible light sources, TMO supports many experimental techniques not previously available at LCLS and will have two X-ray beam focus spots in line. Thereby, TMO supports Atomic, Molecular and Optical (AMO), strong-field and nonlinear science and will host a designated new dynamic reaction microscope with a sub-micron X-ray focus spot. The flexible instrument design is optimized for studying ultrafast electronic and molecular phenomena and can take full advantage of the sub-femtosecond soft X-ray pulse generation program. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2112.00863v1-abstract-full').style.display = 'none'; document.getElementById('2112.00863v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 1 December, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> gb5129 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Journal of Synchrotron Radiation 2022 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2105.08854">arXiv:2105.08854</a> <span> [<a href="https://arxiv.org/pdf/2105.08854">pdf</a>, <a href="https://arxiv.org/format/2105.08854">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1126/science.abj2096">10.1126/science.abj2096 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Attosecond Coherent Electron Motion in Auger-Meitner Decay </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Li%2C+S">Siqi Li</a>, <a href="/search/physics?searchtype=author&query=Driver%2C+T">Taran Driver</a>, <a href="/search/physics?searchtype=author&query=Rosenberger%2C+P">Philipp Rosenberger</a>, <a href="/search/physics?searchtype=author&query=Champenois%2C+E+G">Elio G. Champenois</a>, <a href="/search/physics?searchtype=author&query=Duris%2C+J">Joseph Duris</a>, <a href="/search/physics?searchtype=author&query=Al-Haddad%2C+A">Andre Al-Haddad</a>, <a href="/search/physics?searchtype=author&query=Averbukh%2C+V">Vitali Averbukh</a>, <a href="/search/physics?searchtype=author&query=Barnard%2C+J+C+T">Jonathan C. T. Barnard</a>, <a href="/search/physics?searchtype=author&query=Berrah%2C+N">Nora Berrah</a>, <a href="/search/physics?searchtype=author&query=Bostedt%2C+C">Christoph Bostedt</a>, <a href="/search/physics?searchtype=author&query=Bucksbaum%2C+P+H">Philip H. Bucksbaum</a>, <a href="/search/physics?searchtype=author&query=Coffee%2C+R">Ryan Coffee</a>, <a href="/search/physics?searchtype=author&query=DiMauro%2C+L+F">Louis F. DiMauro</a>, <a href="/search/physics?searchtype=author&query=Fang%2C+L">Li Fang</a>, <a href="/search/physics?searchtype=author&query=Garratt%2C+D">Douglas Garratt</a>, <a href="/search/physics?searchtype=author&query=Gatton%2C+A">Averell Gatton</a>, <a href="/search/physics?searchtype=author&query=Guo%2C+Z">Zhaoheng Guo</a>, <a href="/search/physics?searchtype=author&query=Hartmann%2C+G">Gregor Hartmann</a>, <a href="/search/physics?searchtype=author&query=Haxton%2C+D">Daniel Haxton</a>, <a href="/search/physics?searchtype=author&query=Helml%2C+W">Wolfram Helml</a>, <a href="/search/physics?searchtype=author&query=Huang%2C+Z">Zhirong Huang</a>, <a href="/search/physics?searchtype=author&query=LaForge%2C+A+C">Aaron C. LaForge</a>, <a href="/search/physics?searchtype=author&query=Kamalov%2C+A">Andrei Kamalov</a>, <a href="/search/physics?searchtype=author&query=Knurr%2C+J">Jonas Knurr</a>, <a href="/search/physics?searchtype=author&query=Lin%2C+M">Ming-Fu Lin</a> , et al. (16 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2105.08854v1-abstract-short" style="display: inline;"> In quantum systems, coherent superpositions of electronic states evolve on ultrafast timescales (few femtosecond to attosecond, 1 as = 0.001 fs = 10^{-18} s), leading to a time dependent charge density. Here we exploit the first attosecond soft x-ray pulses produced by an x-ray free-electron laser to induce a coherent core-hole excitation in nitric oxide. Using an additional circularly polarized i… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2105.08854v1-abstract-full').style.display = 'inline'; document.getElementById('2105.08854v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2105.08854v1-abstract-full" style="display: none;"> In quantum systems, coherent superpositions of electronic states evolve on ultrafast timescales (few femtosecond to attosecond, 1 as = 0.001 fs = 10^{-18} s), leading to a time dependent charge density. Here we exploit the first attosecond soft x-ray pulses produced by an x-ray free-electron laser to induce a coherent core-hole excitation in nitric oxide. Using an additional circularly polarized infrared laser pulse we create a clock to time-resolve the electron dynamics, and demonstrate control of the coherent electron motion by tuning the photon energy of the x-ray pulse. Core-excited states offer a fundamental test bed for studying coherent electron dynamics in highly excited and strongly correlated matter. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2105.08854v1-abstract-full').style.display = 'none'; document.getElementById('2105.08854v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 May, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2021. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2105.06507">arXiv:2105.06507</a> <span> [<a href="https://arxiv.org/pdf/2105.06507">pdf</a>, <a href="https://arxiv.org/format/2105.06507">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevX.11.031048">10.1103/PhysRevX.11.031048 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Correlation Driven Transient Hole Dynamics Resolved in Space and Time in the Isopropanol Molecule </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Barillot%2C+T">T. Barillot</a>, <a href="/search/physics?searchtype=author&query=Alexander%2C+O">O. Alexander</a>, <a href="/search/physics?searchtype=author&query=Cooper%2C+B">B. Cooper</a>, <a href="/search/physics?searchtype=author&query=Driver%2C+T">T. Driver</a>, <a href="/search/physics?searchtype=author&query=Garratt%2C+D">D. Garratt</a>, <a href="/search/physics?searchtype=author&query=Li%2C+S">S. Li</a>, <a href="/search/physics?searchtype=author&query=Haddad%2C+A+A">A. Al Haddad</a>, <a href="/search/physics?searchtype=author&query=Sanchez-Gonzalez%2C+A">A. Sanchez-Gonzalez</a>, <a href="/search/physics?searchtype=author&query=Ag%C3%A5ker%2C+M">M. Ag氓ker</a>, <a href="/search/physics?searchtype=author&query=Arrell%2C+C">C. Arrell</a>, <a href="/search/physics?searchtype=author&query=Bearpark%2C+M">M. Bearpark</a>, <a href="/search/physics?searchtype=author&query=Berrah%2C+N">N. Berrah</a>, <a href="/search/physics?searchtype=author&query=Bostedt%2C+C">C. Bostedt</a>, <a href="/search/physics?searchtype=author&query=Bozek%2C+J">J. Bozek</a>, <a href="/search/physics?searchtype=author&query=Brahms%2C+C">C. Brahms</a>, <a href="/search/physics?searchtype=author&query=Bucksbaum%2C+P+H">P. H. Bucksbaum</a>, <a href="/search/physics?searchtype=author&query=Clark%2C+A">A. Clark</a>, <a href="/search/physics?searchtype=author&query=Doumy%2C+G">G. Doumy</a>, <a href="/search/physics?searchtype=author&query=Feifel%2C+R">R. Feifel</a>, <a href="/search/physics?searchtype=author&query=Frasinski%2C+L+J">L. J. Frasinski</a>, <a href="/search/physics?searchtype=author&query=Jarosch%2C+S">S. Jarosch</a>, <a href="/search/physics?searchtype=author&query=Johnson%2C+A+S">A. S. Johnson</a>, <a href="/search/physics?searchtype=author&query=Kjellsson%2C+L">L. Kjellsson</a>, <a href="/search/physics?searchtype=author&query=Koloren%C4%8D%2C+P">P. Koloren膷</a>, <a href="/search/physics?searchtype=author&query=Kumagai%2C+Y">Y. Kumagai</a> , et al. (24 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2105.06507v1-abstract-short" style="display: inline;"> The possibility of suddenly ionized molecules undergoing extremely fast electron hole dynamics prior to significant structural change was first recognized more than 20 years ago and termed charge migration. The accurate probing of ultrafast electron hole dynamics requires measurements that have both sufficient temporal resolution and can detect the localization of a specific hole within the molecu… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2105.06507v1-abstract-full').style.display = 'inline'; document.getElementById('2105.06507v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2105.06507v1-abstract-full" style="display: none;"> The possibility of suddenly ionized molecules undergoing extremely fast electron hole dynamics prior to significant structural change was first recognized more than 20 years ago and termed charge migration. The accurate probing of ultrafast electron hole dynamics requires measurements that have both sufficient temporal resolution and can detect the localization of a specific hole within the molecule. We report an investigation of the dynamics of inner valence hole states in isopropanol where we use an x-ray pump/x-ray probe experiment, with site and state-specific probing of a transient hole state localized near the oxygen atom in the molecule, together with an ab initio theoretical treatment. We record the signature of transient hole dynamics and make the first observation of dynamics driven by frustrated Auger-Meitner transitions. We verify that the hole lifetime is consistent with our theoretical prediction. This state-specific measurement paves the way to widespread application for observations of transient hole dynamics localized in space and time in molecules and thus to charge transfer phenomena that are fundamental in chemical and material physics. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2105.06507v1-abstract-full').style.display = 'none'; document.getElementById('2105.06507v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 13 May, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. X 11, 031048 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2103.07603">arXiv:2103.07603</a> <span> [<a href="https://arxiv.org/pdf/2103.07603">pdf</a>, <a href="https://arxiv.org/format/2103.07603">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> Multi-Resolution Electron Spectrometer Array for Future Free-Electron Laser Experiments </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Walter%2C+P">Peter Walter</a>, <a href="/search/physics?searchtype=author&query=Kamalov%2C+A">Andrei Kamalov</a>, <a href="/search/physics?searchtype=author&query=Gatton%2C+A">Averell Gatton</a>, <a href="/search/physics?searchtype=author&query=Driver%2C+T">Taran Driver</a>, <a href="/search/physics?searchtype=author&query=Bhogadi%2C+D">Dileep Bhogadi</a>, <a href="/search/physics?searchtype=author&query=Castagna%2C+J">Jean-Charles Castagna</a>, <a href="/search/physics?searchtype=author&query=Cheng%2C+X">Xianchao Cheng</a>, <a href="/search/physics?searchtype=author&query=Shi%2C+H">Hongliang Shi</a>, <a href="/search/physics?searchtype=author&query=Cryan%2C+J">James Cryan</a>, <a href="/search/physics?searchtype=author&query=Helml%2C+W">Wolfram Helml</a>, <a href="/search/physics?searchtype=author&query=Ilchen%2C+M">Markus Ilchen</a>, <a href="/search/physics?searchtype=author&query=Coffee%2C+R+N">Ryan N. Coffee</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2103.07603v1-abstract-short" style="display: inline;"> We report the design of an angular array of electron Time-of-Flight (eToF) spectrometers intended for non-invasive spectral, temporal, and polarization characterization of single shots of high-repetition rate, quasi-continuous, short-wavelength Free-Electron Lasers (FELs) such as the LCLS-II at SLAC. This array also enables angle-resolved, high-resolution eToF spectroscopy to address a variety of… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.07603v1-abstract-full').style.display = 'inline'; document.getElementById('2103.07603v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2103.07603v1-abstract-full" style="display: none;"> We report the design of an angular array of electron Time-of-Flight (eToF) spectrometers intended for non-invasive spectral, temporal, and polarization characterization of single shots of high-repetition rate, quasi-continuous, short-wavelength Free-Electron Lasers (FELs) such as the LCLS-II at SLAC. This array also enables angle-resolved, high-resolution eToF spectroscopy to address a variety of scientific questions of ultrafast and nonlinear light--matter interaction at FELs. The presented device is specifically designed for the Time-resolved atomic, Molecular and Optical science end station (TMO) at LCLS-II. In its final version, it can comprise of up to 20 eToF spectrometers aligned to collect electrons from the interaction point defined by the intersection of the incoming FEL radiation and a gaseous target. There are 16 such spectrometers forming a circular equiangular array in the plane normal to x-ray propagation and 4 spectrometers at 54.7$^\circ$ angle relative to the principle linear x-ray polarization axis. The spectrometers are capable of independent and minimally chromatic electrostatic lensing and retardation in order to enable simultaneous angle-resolved photo-electron and Auger electron spectroscopy with high energy resolution. They are designed to ensure energy resolution of 0.25 eV across an energy window of up to 75 eV which can be individually centered via the adjustable retardation to cover ranges of electron kinetic energies relevant to soft x-ray methods, 0--2 keV. The full spectrometer array will enable non-invasive and online spectral-polarimetry measurements, polarization-sensitive attoclock spectroscopy for characterizing the full time--energy structure of even SASE or seeded LCLS-II pulses, and also supports emerging trends in molecular frame spectroscopy measurements. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.07603v1-abstract-full').style.display = 'none'; document.getElementById('2103.07603v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 March, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">under review</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2004.11949">arXiv:2004.11949</a> <span> [<a href="https://arxiv.org/pdf/2004.11949">pdf</a>, <a href="https://arxiv.org/format/2004.11949">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Biomolecules">q-bio.BM</span> </div> </div> <p class="title is-5 mathjax"> Two-dimensional partial covariance mass spectrometry for the top-down analysis of intact proteins </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Driver%2C+T">Taran Driver</a>, <a href="/search/physics?searchtype=author&query=Averbukh%2C+V">Vitali Averbukh</a>, <a href="/search/physics?searchtype=author&query=Frasinski%2C+L+J">Leszek J. Frasinski</a>, <a href="/search/physics?searchtype=author&query=Marangos%2C+J+P">Jon P. Marangos</a>, <a href="/search/physics?searchtype=author&query=Edelson-Averbukh%2C+M">Marina Edelson-Averbukh</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2004.11949v2-abstract-short" style="display: inline;"> Two-dimensional partial covariance mass spectrometry (2D-PC-MS) exploits the inherent fluctuations of fragment ion abundances across a series of tandem mass spectra, to identify correlated pairs of fragment ions produced along the same fragmentation pathway of the same parent (e.g. peptide) ion. Here, we apply 2D-PC-MS to the analysis of intact protein ions in a standard linear ion trap mass analy… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2004.11949v2-abstract-full').style.display = 'inline'; document.getElementById('2004.11949v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2004.11949v2-abstract-full" style="display: none;"> Two-dimensional partial covariance mass spectrometry (2D-PC-MS) exploits the inherent fluctuations of fragment ion abundances across a series of tandem mass spectra, to identify correlated pairs of fragment ions produced along the same fragmentation pathway of the same parent (e.g. peptide) ion. Here, we apply 2D-PC-MS to the analysis of intact protein ions in a standard linear ion trap mass analyzer, using the fact that the fragment-fragment correlation signals are much more specific to bio-molecular sequence than 1D MS/MS signals at the same mass accuracy and resolution. We show that from the distribution of signals on a 2D-PC-MS map it is possible to extract the charge state of both parent and fragment ions without resolving the isotopic envelope. Furthermore, the 2D map of fragment-fragment correlations naturally reveals the secondary decomposition pathways of the fragment ions. We access this spectral information using an adapted version of the Hough transform. We demonstrate the successful identification of highly charged, intact protein molecules without the need for high mass resolution. Using this technique we also perform the in silico deconvolution of the overlapping fragment ion signals from two co-isolated and co-fragmented intact protein molecules, demonstrating a viable new method for the concurrent mass spectrometric identification of a mixture of intact protein ions from the same fragment ion spectrum. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2004.11949v2-abstract-full').style.display = 'none'; document.getElementById('2004.11949v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 2 December, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 24 April, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2020. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1909.07441">arXiv:1909.07441</a> <span> [<a href="https://arxiv.org/pdf/1909.07441">pdf</a>, <a href="https://arxiv.org/format/1909.07441">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1039/C9CP03951A">10.1039/C9CP03951A <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Attosecond Transient Absorption Spooktroscopy: a ghost imaging approach to ultrafast absorption spectroscopy </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Driver%2C+T">Taran Driver</a>, <a href="/search/physics?searchtype=author&query=Li%2C+S">Siqi Li</a>, <a href="/search/physics?searchtype=author&query=Champenois%2C+E+G">Elio G. Champenois</a>, <a href="/search/physics?searchtype=author&query=Duris%2C+J">Joseph Duris</a>, <a href="/search/physics?searchtype=author&query=Ratner%2C+D">Daniel Ratner</a>, <a href="/search/physics?searchtype=author&query=Lane%2C+T">TJ Lane</a>, <a href="/search/physics?searchtype=author&query=Rosenberger%2C+P">Philipp Rosenberger</a>, <a href="/search/physics?searchtype=author&query=Al-Haddad%2C+A">Andre Al-Haddad</a>, <a href="/search/physics?searchtype=author&query=Averbukh%2C+V">Vitali Averbukh</a>, <a href="/search/physics?searchtype=author&query=Barnard%2C+T">Toby Barnard</a>, <a href="/search/physics?searchtype=author&query=Berrah%2C+N">Nora Berrah</a>, <a href="/search/physics?searchtype=author&query=Bostedt%2C+C">Christoph Bostedt</a>, <a href="/search/physics?searchtype=author&query=Bucksbaum%2C+P+H">Philip H. Bucksbaum</a>, <a href="/search/physics?searchtype=author&query=Coffee%2C+R">Ryan Coffee</a>, <a href="/search/physics?searchtype=author&query=DiMauro%2C+L+F">Louis F. DiMauro</a>, <a href="/search/physics?searchtype=author&query=Fang%2C+L">Li Fang</a>, <a href="/search/physics?searchtype=author&query=Garratt%2C+D">Douglas Garratt</a>, <a href="/search/physics?searchtype=author&query=Gatton%2C+A">Averell Gatton</a>, <a href="/search/physics?searchtype=author&query=Guo%2C+Z">Zhaoheng Guo</a>, <a href="/search/physics?searchtype=author&query=Hartmann%2C+G">Gregor Hartmann</a>, <a href="/search/physics?searchtype=author&query=Haxton%2C+D">Daniel Haxton</a>, <a href="/search/physics?searchtype=author&query=Helml%2C+W">Wolfram Helml</a>, <a href="/search/physics?searchtype=author&query=Huang%2C+Z">Zhirong Huang</a>, <a href="/search/physics?searchtype=author&query=LaForge%2C+A">Aaron LaForge</a>, <a href="/search/physics?searchtype=author&query=Kamalov%2C+A">Andrei Kamalov</a> , et al. (16 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1909.07441v1-abstract-short" style="display: inline;"> The recent demonstration of isolated attosecond pulses from an X-ray free-electron laser (XFEL) opens the possibility for probing ultrafast electron dynamics at X-ray wavelengths. An established experimental method for probing ultrafast dynamics is X-ray transient absorption spectroscopy, where the X-ray absorption spectrum is measured by scanning the central photon energy and recording the result… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1909.07441v1-abstract-full').style.display = 'inline'; document.getElementById('1909.07441v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1909.07441v1-abstract-full" style="display: none;"> The recent demonstration of isolated attosecond pulses from an X-ray free-electron laser (XFEL) opens the possibility for probing ultrafast electron dynamics at X-ray wavelengths. An established experimental method for probing ultrafast dynamics is X-ray transient absorption spectroscopy, where the X-ray absorption spectrum is measured by scanning the central photon energy and recording the resultant photoproducts. The spectral bandwidth inherent to attosecond pulses is wide compared to the resonant features typically probed, which generally precludes the application of this technique in the attosecond regime. In this paper we propose and demonstrate a new technique to conduct transient absorption spectroscopy with broad bandwidth attosecond pulses with the aid of ghost imaging, recovering sub-bandwidth resolution in photoproduct-based absorption measurements. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1909.07441v1-abstract-full').style.display = 'none'; document.getElementById('1909.07441v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 September, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">13 pages, 3 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1906.10649">arXiv:1906.10649</a> <span> [<a href="https://arxiv.org/pdf/1906.10649">pdf</a>, <a href="https://arxiv.org/format/1906.10649">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41566-019-0549-5">10.1038/s41566-019-0549-5 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Tunable Isolated Attosecond X-ray Pulses with Gigawatt Peak Power from a Free-Electron Laser </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Duris%2C+J">Joseph Duris</a>, <a href="/search/physics?searchtype=author&query=Li%2C+S">Siqi Li</a>, <a href="/search/physics?searchtype=author&query=Driver%2C+T">Taran Driver</a>, <a href="/search/physics?searchtype=author&query=Champenois%2C+E+G">Elio G. Champenois</a>, <a href="/search/physics?searchtype=author&query=MacArthur%2C+J+P">James P. MacArthur</a>, <a href="/search/physics?searchtype=author&query=Lutman%2C+A+A">Alberto A. Lutman</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+Z">Zhen Zhang</a>, <a href="/search/physics?searchtype=author&query=Rosenberger%2C+P">Philipp Rosenberger</a>, <a href="/search/physics?searchtype=author&query=Aldrich%2C+J+W">Jeff W. Aldrich</a>, <a href="/search/physics?searchtype=author&query=Coffee%2C+R">Ryan Coffee</a>, <a href="/search/physics?searchtype=author&query=Coslovich%2C+G">Giacomo Coslovich</a>, <a href="/search/physics?searchtype=author&query=Decker%2C+F">Franz-Josef Decker</a>, <a href="/search/physics?searchtype=author&query=Glownia%2C+J+M">James M. Glownia</a>, <a href="/search/physics?searchtype=author&query=Hartmann%2C+G">Gregor Hartmann</a>, <a href="/search/physics?searchtype=author&query=Helml%2C+W">Wolfram Helml</a>, <a href="/search/physics?searchtype=author&query=Kamalov%2C+A">Andrei Kamalov</a>, <a href="/search/physics?searchtype=author&query=Knurr%2C+J">Jonas Knurr</a>, <a href="/search/physics?searchtype=author&query=Krzywinski%2C+J">Jacek Krzywinski</a>, <a href="/search/physics?searchtype=author&query=Lin%2C+M">Ming-Fu Lin</a>, <a href="/search/physics?searchtype=author&query=Nantel%2C+M">Megan Nantel</a>, <a href="/search/physics?searchtype=author&query=Natan%2C+A">Adi Natan</a>, <a href="/search/physics?searchtype=author&query=O%27Neal%2C+J">Jordan O'Neal</a>, <a href="/search/physics?searchtype=author&query=Shivaram%2C+N">Niranjan Shivaram</a>, <a href="/search/physics?searchtype=author&query=Walter%2C+P">Peter Walter</a>, <a href="/search/physics?searchtype=author&query=Wang%2C+A">Anna Wang</a> , et al. (9 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1906.10649v1-abstract-short" style="display: inline;"> The quantum mechanical motion of electrons in molecules and solids occurs on the sub-femtosecond timescale. Consequently, the study of ultrafast electronic phenomena requires the generation of laser pulses shorter than 1 fs and of sufficient intensity to interact with their target with high probability. Probing these dynamics with atomic-site specificity requires the extension of sub-femtosecond p… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1906.10649v1-abstract-full').style.display = 'inline'; document.getElementById('1906.10649v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1906.10649v1-abstract-full" style="display: none;"> The quantum mechanical motion of electrons in molecules and solids occurs on the sub-femtosecond timescale. Consequently, the study of ultrafast electronic phenomena requires the generation of laser pulses shorter than 1 fs and of sufficient intensity to interact with their target with high probability. Probing these dynamics with atomic-site specificity requires the extension of sub-femtosecond pulses to the soft X-ray spectral region. Here we report the generation of isolated GW-scale soft X-ray attosecond pulses with an X-ray free-electron laser. Our source has a pulse energy that is six orders of magnitude larger than any other source of isolated attosecond pulses in the soft X-ray spectral region, with a peak power in the tens of gigawatts. This unique combination of high intensity, high photon energy and short pulse duration enables the investigation of electron dynamics with X-ray non-linear spectroscopy and single-particle imaging. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1906.10649v1-abstract-full').style.display = 'none'; document.getElementById('1906.10649v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 June, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Duris, J., Li, S., Driver, T. et al. Nat. Photonics 14, 30-36 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1904.05946">arXiv:1904.05946</a> <span> [<a href="https://arxiv.org/pdf/1904.05946">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Biomolecules">q-bio.BM</span> </div> </div> <p class="title is-5 mathjax"> Partial covariance two-dimensional mass spectrometry for determination of biomolecular primary structure </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Driver%2C+T">Taran Driver</a>, <a href="/search/physics?searchtype=author&query=Ayers%2C+R">Ruth Ayers</a>, <a href="/search/physics?searchtype=author&query=Pipkorn%2C+R">R眉diger Pipkorn</a>, <a href="/search/physics?searchtype=author&query=Cooper%2C+B">Bridgette Cooper</a>, <a href="/search/physics?searchtype=author&query=Bachhawat%2C+N">Nikhil Bachhawat</a>, <a href="/search/physics?searchtype=author&query=Patchkovskii%2C+S">Serguei Patchkovskii</a>, <a href="/search/physics?searchtype=author&query=Averbukh%2C+V">Vitali Averbukh</a>, <a href="/search/physics?searchtype=author&query=Klug%2C+D+R">David R. Klug</a>, <a href="/search/physics?searchtype=author&query=Marangos%2C+J+P">Jon P. Marangos</a>, <a href="/search/physics?searchtype=author&query=Frasinski%2C+L+J">Leszek J. Frasinski</a>, <a href="/search/physics?searchtype=author&query=Edelson-Averbukh%2C+M">Marina Edelson-Averbukh</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1904.05946v1-abstract-short" style="display: inline;"> Mass spectrometry (MS) is used widely in biomolecular structural analysis and is particularly dominant in the study of proteins. Despite its considerable power, state-of-the-art protein MS frequently suffers from limited reliability of spectrum-to-structure assignments. This could not be solved fully by the dramatic increase in mass accuracy and resolution of modern MS instrumentation or by the in… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1904.05946v1-abstract-full').style.display = 'inline'; document.getElementById('1904.05946v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1904.05946v1-abstract-full" style="display: none;"> Mass spectrometry (MS) is used widely in biomolecular structural analysis and is particularly dominant in the study of proteins. Despite its considerable power, state-of-the-art protein MS frequently suffers from limited reliability of spectrum-to-structure assignments. This could not be solved fully by the dramatic increase in mass accuracy and resolution of modern MS instrumentation or by the introduction of new fragmentation methods. Here we present a new kind of two-dimensional mass spectrometry for high fidelity determination of a biomolecular primary structure based on partial covariance mapping. Partial covariance two-dimensional mass spectrometry (pC-2DMS) detects intrinsic statistical correlations between biomolecular fragments originating from the same or consecutive decomposition events. This enables identification of pairs of ions produced along the same fragmentation pathway of a biomolecule across its entire fragment mass spectrum. We demonstrate that the fragment-fragment correlations revealed by pC-2DMS provide much more specific information on the amino acid sequence and its covalent modifications than the individual fragment mass-to-charge ratios on which standard one-dimensional MS is based. We illustrate the power of pC-2DMS by using it to resolve structural isomers of combinatorially modified histone peptides inaccessible to standard MS. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1904.05946v1-abstract-full').style.display = 'none'; document.getElementById('1904.05946v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 April, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2019. </p> </li> </ol> <div class="is-hidden-tablet">  <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search v0.5.6 released 2020-02-24</a>  </span> </div> </div> </main> <footer> <div class="columns is-desktop" role="navigation" aria-label="Secondary">  <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/about">About</a></li> <li><a href="https://info.arxiv.org/help">Help</a></li> </ul> </div> <div class="column"> <ul class="nav-spaced"> <li> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><title>contact arXiv</title><desc>Click here to contact arXiv</desc><path d="M502.3 190.8c3.9-3.1 9.7-.2 9.7 4.7V400c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V195.6c0-5 5.7-7.8 9.7-4.7 22.4 17.4 52.1 39.5 154.1 113.6 21.1 15.4 56.7 47.8 92.2 47.6 35.7.3 72-32.8 92.3-47.6 102-74.1 131.6-96.3 154-113.7zM256 320c23.2.4 56.6-29.2 73.4-41.4 132.7-96.3 142.8-104.7 173.4-128.7 5.8-4.5 9.2-11.5 9.2-18.9v-19c0-26.5-21.5-48-48-48H48C21.5 64 0 85.5 0 112v19c0 7.4 3.4 14.3 9.2 18.9 30.6 23.9 40.7 32.4 173.4 128.7 16.8 12.2 50.2 41.8 73.4 41.4z"/></svg> <a href="https://info.arxiv.org/help/contact.html"> Contact</a> </li> <li> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><title>subscribe to arXiv mailings</title><desc>Click here to subscribe</desc><path d="M476 3.2L12.5 270.6c-18.1 10.4-15.8 35.6 2.2 43.2L121 358.4l287.3-253.2c5.5-4.9 13.3 2.6 8.6 8.3L176 407v80.5c0 23.6 28.5 32.9 42.5 15.8L282 426l124.6 52.2c14.2 6 30.4-2.9 33-18.2l72-432C515 7.8 493.3-6.8 476 3.2z"/></svg> <a href="https://info.arxiv.org/help/subscribe"> Subscribe</a> </li> </ul> </div> </div> </div>   <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/help/license/index.html">Copyright</a></li> <li><a href="https://info.arxiv.org/help/policies/privacy_policy.html">Privacy Policy</a></li> </ul> </div> <div class="column sorry-app-links"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/help/web_accessibility.html">Web Accessibility Assistance</a></li> <li> <p class="help"> <a class="a11y-main-link" href="https://status.arxiv.org" target="_blank">arXiv Operational Status <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 256 512" class="icon filter-dark_grey" role="presentation"><path d="M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z"/></svg></a><br> Get status notifications via <a class="is-link" href="https://subscribe.sorryapp.com/24846f03/email/new" target="_blank"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><path d="M502.3 190.8c3.9-3.1 9.7-.2 9.7 4.7V400c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V195.6c0-5 5.7-7.8 9.7-4.7 22.4 17.4 52.1 39.5 154.1 113.6 21.1 15.4 56.7 47.8 92.2 47.6 35.7.3 72-32.8 92.3-47.6 102-74.1 131.6-96.3 154-113.7zM256 320c23.2.4 56.6-29.2 73.4-41.4 132.7-96.3 142.8-104.7 173.4-128.7 5.8-4.5 9.2-11.5 9.2-18.9v-19c0-26.5-21.5-48-48-48H48C21.5 64 0 85.5 0 112v19c0 7.4 3.4 14.3 9.2 18.9 30.6 23.9 40.7 32.4 173.4 128.7 16.8 12.2 50.2 41.8 73.4 41.4z"/></svg>email</a> or <a class="is-link" href="https://subscribe.sorryapp.com/24846f03/slack/new" target="_blank"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512" class="icon filter-black" role="presentation"><path d="M94.12 315.1c0 25.9-21.16 47.06-47.06 47.06S0 341 0 315.1c0-25.9 21.16-47.06 47.06-47.06h47.06v47.06zm23.72 0c0-25.9 21.16-47.06 47.06-47.06s47.06 21.16 47.06 47.06v117.84c0 25.9-21.16 47.06-47.06 47.06s-47.06-21.16-47.06-47.06V315.1zm47.06-188.98c-25.9 0-47.06-21.16-47.06-47.06S139 32 164.9 32s47.06 21.16 47.06 47.06v47.06H164.9zm0 23.72c25.9 0 47.06 21.16 47.06 47.06s-21.16 47.06-47.06 47.06H47.06C21.16 243.96 0 222.8 0 196.9s21.16-47.06 47.06-47.06H164.9zm188.98 47.06c0-25.9 21.16-47.06 47.06-47.06 25.9 0 47.06 21.16 47.06 47.06s-21.16 47.06-47.06 47.06h-47.06V196.9zm-23.72 0c0 25.9-21.16 47.06-47.06 47.06-25.9 0-47.06-21.16-47.06-47.06V79.06c0-25.9 21.16-47.06 47.06-47.06 25.9 0 47.06 21.16 47.06 47.06V196.9zM283.1 385.88c25.9 0 47.06 21.16 47.06 47.06 0 25.9-21.16 47.06-47.06 47.06-25.9 0-47.06-21.16-47.06-47.06v-47.06h47.06zm0-23.72c-25.9 0-47.06-21.16-47.06-47.06 0-25.9 21.16-47.06 47.06-47.06h117.84c25.9 0 47.06 21.16 47.06 47.06 0 25.9-21.16 47.06-47.06 47.06H283.1z"/></svg>slack</a> </p> </li> </ul> </div> </div> </div>  </div> </footer> <script src="https://static.arxiv.org/static/base/1.0.0a5/js/member_acknowledgement.js"></script> </body> </html>

CINXE.COM

Search | arXiv e-print repository