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</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/2312.06671">arXiv:2312.06671</a> <span> [<a href="https://arxiv.org/pdf/2312.06671">pdf</a>, <a href="https://arxiv.org/format/2312.06671">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-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"> Generalized Finite Differences Method Applied to Finite Photonic Crystal </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Bustamante%2C+S">Santiago Bustamante</a>, <a href="/search/physics?searchtype=author&query=Marulanda%2C+E">Esteban Marulanda</a>, <a href="/search/physics?searchtype=author&query=Mahecha%2C+J">Jorge Mahecha</a>, <a href="/search/physics?searchtype=author&query=Vinck%2C+H">Herbert Vinck</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="2312.06671v1-abstract-short" style="display: inline;"> We propose a Generalized Finite-Differences in the Frequency Domain method for the computation of photonic band structures of finite photonic crystals. Our approach is to discretize some fundamental domain instead of a single unit cell, such that boundary conditions of interest can be introduced into the eigenvalue problem. The validity and effectiveness of the proposed method are shown for the ca… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2312.06671v1-abstract-full').style.display = 'inline'; document.getElementById('2312.06671v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2312.06671v1-abstract-full" style="display: none;"> We propose a Generalized Finite-Differences in the Frequency Domain method for the computation of photonic band structures of finite photonic crystals. Our approach is to discretize some fundamental domain instead of a single unit cell, such that boundary conditions of interest can be introduced into the eigenvalue problem. The validity and effectiveness of the proposed method are shown for the case of a one-dimensional photonic crystal embedded in an optical cavity. The limit from finite to infinite photonic crystals is reviewed in view of the proposed method. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2312.06671v1-abstract-full').style.display = 'none'; document.getElementById('2312.06671v1-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> 6 December, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1809.04478">arXiv:1809.04478</a> <span> [<a href="https://arxiv.org/pdf/1809.04478">pdf</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="Plasma Physics">physics.plasm-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/PhysRevLett.122.054802">10.1103/PhysRevLett.122.054802 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Experimental observation of proton bunch modulation in a plasma, at varying plasma densities </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Adli%2C+E">E. Adli</a>, <a href="/search/physics?searchtype=author&query=Ahuja%2C+A">A. Ahuja</a>, <a href="/search/physics?searchtype=author&query=Apsimon%2C+O">O. Apsimon</a>, <a href="/search/physics?searchtype=author&query=Apsimon%2C+R">R. Apsimon</a>, <a href="/search/physics?searchtype=author&query=Bachmann%2C+A+-">A. -M. Bachmann</a>, <a href="/search/physics?searchtype=author&query=Barrientos%2C+D">D. Barrientos</a>, <a href="/search/physics?searchtype=author&query=Barros%2C+M+M">M. M. Barros</a>, <a href="/search/physics?searchtype=author&query=Batkiewicz%2C+J">J. Batkiewicz</a>, <a href="/search/physics?searchtype=author&query=Batsch%2C+F">F. Batsch</a>, <a href="/search/physics?searchtype=author&query=Bauche%2C+J">J. Bauche</a>, <a href="/search/physics?searchtype=author&query=Olsen%2C+V+K+B">V. K. Berglyd Olsen</a>, <a href="/search/physics?searchtype=author&query=Bernardini%2C+M">M. Bernardini</a>, <a href="/search/physics?searchtype=author&query=Biskup%2C+B">B. Biskup</a>, <a href="/search/physics?searchtype=author&query=Boccardi%2C+A">A. Boccardi</a>, <a href="/search/physics?searchtype=author&query=Bogey%2C+T">T. Bogey</a>, <a href="/search/physics?searchtype=author&query=Bohl%2C+T">T. Bohl</a>, <a href="/search/physics?searchtype=author&query=Bracco%2C+C">C. Bracco</a>, <a href="/search/physics?searchtype=author&query=Braunm%C3%BCller%2C+F">F. Braunm眉ller</a>, <a href="/search/physics?searchtype=author&query=Burger%2C+S">S. Burger</a>, <a href="/search/physics?searchtype=author&query=Burt%2C+G">G. Burt</a>, <a href="/search/physics?searchtype=author&query=Bustamante%2C+S">S. Bustamante</a>, <a href="/search/physics?searchtype=author&query=Buttensch%C3%B6n%2C+B">B. Buttensch枚n</a>, <a href="/search/physics?searchtype=author&query=Caldwell%2C+A">A. Caldwell</a>, <a href="/search/physics?searchtype=author&query=Cascella%2C+M">M. Cascella</a>, <a href="/search/physics?searchtype=author&query=Chappell%2C+J">J. Chappell</a> , et al. (87 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="1809.04478v2-abstract-short" style="display: inline;"> We give direct experimental evidence for the observation of the full transverse self-modulation of a relativistic proton bunch propagating through a dense plasma. The bunch exits the plasma with a density modulation resulting from radial wakefield effects with a period reciprocal to the plasma frequency. We show that the modulation is seeded by using an intense laser pulse co-propagating with the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1809.04478v2-abstract-full').style.display = 'inline'; document.getElementById('1809.04478v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1809.04478v2-abstract-full" style="display: none;"> We give direct experimental evidence for the observation of the full transverse self-modulation of a relativistic proton bunch propagating through a dense plasma. The bunch exits the plasma with a density modulation resulting from radial wakefield effects with a period reciprocal to the plasma frequency. We show that the modulation is seeded by using an intense laser pulse co-propagating with the proton bunch which creates a relativistic ionization front within the bunch. We show by varying the plasma density over one order of magnitude that the modulation period scales with the expected dependence on the plasma density. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1809.04478v2-abstract-full').style.display = 'none'; document.getElementById('1809.04478v2-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 April, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 12 September, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2018. </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">4 figures, AWAKE collaboration paper, Submitted to PRL</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 122, 054802 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1708.01087">arXiv:1708.01087</a> <span> [<a href="https://arxiv.org/pdf/1708.01087">pdf</a>, <a href="https://arxiv.org/format/1708.01087">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Plasma Physics">physics.plasm-ph</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/10.1088/1361-6587/aa941c">10.1088/1361-6587/aa941c <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> AWAKE readiness for the study of the seeded self-modulation of a 400\,GeV proton bunch </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Muggli%2C+P">P. Muggli</a>, <a href="/search/physics?searchtype=author&query=Adli%2C+E">E. Adli</a>, <a href="/search/physics?searchtype=author&query=Apsimon%2C+R">R. Apsimon</a>, <a href="/search/physics?searchtype=author&query=Asmus%2C+F">F. Asmus</a>, <a href="/search/physics?searchtype=author&query=Baartman%2C+R">R. Baartman</a>, <a href="/search/physics?searchtype=author&query=Bachmann%2C+A+-">A. -M. Bachmann</a>, <a href="/search/physics?searchtype=author&query=Marin%2C+M+B">M. Barros Marin</a>, <a href="/search/physics?searchtype=author&query=Batsch%2C+F">F. Batsch</a>, <a href="/search/physics?searchtype=author&query=Bauche%2C+J">J. Bauche</a>, <a href="/search/physics?searchtype=author&query=Olsen%2C+V+K+B">V. K. Berglyd Olsen</a>, <a href="/search/physics?searchtype=author&query=Bernardini%2C+M">M. Bernardini</a>, <a href="/search/physics?searchtype=author&query=Biskup%2C+B">B. Biskup</a>, <a href="/search/physics?searchtype=author&query=Boccardi%2C+A">A. Boccardi</a>, <a href="/search/physics?searchtype=author&query=Bogey%2C+T">T. Bogey</a>, <a href="/search/physics?searchtype=author&query=Bohl%2C+T">T. Bohl</a>, <a href="/search/physics?searchtype=author&query=Bracco%2C+C">C. Bracco</a>, <a href="/search/physics?searchtype=author&query=Braunmuller%2C+F">F. Braunmuller</a>, <a href="/search/physics?searchtype=author&query=Burger%2C+S">S. Burger</a>, <a href="/search/physics?searchtype=author&query=Burt%2C+G">G. Burt</a>, <a href="/search/physics?searchtype=author&query=Bustamante%2C+S">S. Bustamante</a>, <a href="/search/physics?searchtype=author&query=Buttensch%7Fon%2C+B">B. Buttenschon</a>, <a href="/search/physics?searchtype=author&query=Butterworth%2C+A">A. Butterworth</a>, <a href="/search/physics?searchtype=author&query=Caldwell%2C+A">A. Caldwell</a>, <a href="/search/physics?searchtype=author&query=Cascella%2C+M">M. Cascella</a>, <a href="/search/physics?searchtype=author&query=Chevallay%2C+E">E. Chevallay</a> , et al. (82 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="1708.01087v1-abstract-short" style="display: inline;"> AWAKE is a proton-driven plasma wakefield acceleration experiment. % We show that the experimental setup briefly described here is ready for systematic study of the seeded self-modulation of the 400\,GeV proton bunch in the 10\,m-long rubidium plasma with density adjustable from 1 to 10$\times10^{14}$\,cm$^{-3}$. % We show that the short laser pulse used for ionization of the rubidium vapor propag… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1708.01087v1-abstract-full').style.display = 'inline'; document.getElementById('1708.01087v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1708.01087v1-abstract-full" style="display: none;"> AWAKE is a proton-driven plasma wakefield acceleration experiment. % We show that the experimental setup briefly described here is ready for systematic study of the seeded self-modulation of the 400\,GeV proton bunch in the 10\,m-long rubidium plasma with density adjustable from 1 to 10$\times10^{14}$\,cm$^{-3}$. % We show that the short laser pulse used for ionization of the rubidium vapor propagates all the way along the column, suggesting full ionization of the vapor. % We show that ionization occurs along the proton bunch, at the laser time and that the plasma that follows affects the proton bunch. % <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1708.01087v1-abstract-full').style.display = 'none'; document.getElementById('1708.01087v1-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 August, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2017. </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">Presented as an invited talk at the EPS=Plasma Physics Conference 2017</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> 20 pages, 8 figures </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Plasma Physics and Controlled Fusion, Volume 60, Number 1 (2017) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1304.2909">arXiv:1304.2909</a> <span> [<a href="https://arxiv.org/pdf/1304.2909">pdf</a>, <a href="https://arxiv.org/ps/1304.2909">ps</a>, <a href="https://arxiv.org/format/1304.2909">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Earth and Planetary Astrophysics">astro-ph.EP</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Geophysics">physics.geo-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/10.1088/0004-637X/770/1/23">10.1088/0004-637X/770/1/23 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The Influence of Thermal Evolution in the Magnetic Protection of Terrestrial Planets </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Zuluaga%2C+J+I">Jorge I. Zuluaga</a>, <a href="/search/physics?searchtype=author&query=Bustamante%2C+S">Sebastian Bustamante</a>, <a href="/search/physics?searchtype=author&query=Cuartas%2C+P+A">Pablo A. Cuartas</a>, <a href="/search/physics?searchtype=author&query=Hoyos%2C+J+H">Jaime H. Hoyos</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="1304.2909v1-abstract-short" style="display: inline;"> Magnetic protection of potentially habitable planets plays a central role in determining their actual habitability and/or the chances of detecting atmospheric biosignatures. We develop here a thermal evolution model of potentially habitable Earth-like planets and super-Earths. Using up-to-date dynamo scaling laws we predict the properties of core dynamo magnetic fields and study the influence of t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1304.2909v1-abstract-full').style.display = 'inline'; document.getElementById('1304.2909v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1304.2909v1-abstract-full" style="display: none;"> Magnetic protection of potentially habitable planets plays a central role in determining their actual habitability and/or the chances of detecting atmospheric biosignatures. We develop here a thermal evolution model of potentially habitable Earth-like planets and super-Earths. Using up-to-date dynamo scaling laws we predict the properties of core dynamo magnetic fields and study the influence of thermal evolution on their properties. The level of magnetic protection of tidally locked and unlocked planets is estimated by combining simplified models of the planetary magnetosphere and a phenomenological description of the stellar wind. Thermal evolution introduces a strong dependence of magnetic protection on planetary mass and rotation rate. Tidally locked terrestrial planets with an Earth-like composition would have early dayside magnetospause distances between 1.5 and 4.0 Rp, larger than previously estimated. Unlocked planets with periods of rotation ~1 day are protected by magnetospheres extending between 3 and 8 Rp. Our results are robust against variations in planetary bulk composition and uncertainties in other critical model parameters. For illustration purposes the thermal evolution and magnetic protection of the potentially habitable super-Earths GL 581d, GJ 667Cc and HD 40307g were also studied. Assuming an Earth-like composition we found that the dynamos of these planets are already extinct or close to being shut down. While GL 581d is the best protected, the protection of HD 40307g cannot be reliably estimated. GJ 667Cc, even under optimistic conditions, seems to be severely exposed to the stellar wind and, under the conditions of our model, has probably suffered massive atmospheric losses. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1304.2909v1-abstract-full').style.display = 'none'; document.getElementById('1304.2909v1-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> 10 April, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2013. </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">Accepted for publication in Astrophysical Journal. 29 pages, 10 figures. For supplementary material visit http://astronomia.udea.edu.co/research/magnetic-protection</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> ApJ 770 23, 2013 </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 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