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<td valign="top"> <table class="narrowsearchbox"> <thead> <tr> <th class="narrowsearchboxheader">Latest additions:</th> </tr> </thead> <tbody> <tr> <td class="narrowsearchboxbody"><table class="latestadditionsbox"> <tr> <td class="latestadditionsboxtimebody">2023-10-10<br />08:26</td> <td class="latestadditionsboxrecordbody"> <abbr class="unapi-id" title="2875156"></abbr>  <table cellspacing="0" cellpadding="0" border="0"> <tr> <td valign="top" align="left"> <strong><a href="http://cds.cern.ch/record/2875156?ln=en" class="titlelink">Differential measurement of trident production in strong electromagnetic fields</a></strong> / <a href="http://cds.cern.ch/search?f=author&p=Nielsen%2C%20Christian%20F.&ln=en">Nielsen, Christian F.</a> (Aarhus U.) ; <a href="http://cds.cern.ch/search?f=author&p=Holtzapple%2C%20Robert&ln=en">Holtzapple, Robert</a> (Cal. Poly.) ; <a href="http://cds.cern.ch/search?f=author&p=Lund%2C%20Mads%20M.&ln=en">Lund, Mads M.</a> (Aarhus U.) ; <a href="http://cds.cern.ch/search?f=author&p=Surrow%2C%20Jeppe%20H.&ln=en">Surrow, Jeppe H.</a> (Aarhus U.) ; <a href="http://cds.cern.ch/search?f=author&p=S%C3%B8rensen%2C%20Allan%20H.&ln=en">Sørensen, Allan H.</a> (Aarhus U.) ; <a href="http://cds.cern.ch/search?f=author&p=S%C3%B8rensen%2C%20Marc%20B.&ln=en">Sørensen, Marc B.</a> (Aarhus U.) ; <a href="http://cds.cern.ch/search?f=author&p=Uggerh%C3%B8j%2C%20Ulrik%20I.&ln=en">Uggerhøj, Ulrik I.</a> (Aarhus U.) /CERN NA63 Collaboration <br /> <small>In this paper, we present experimental results and numerical simulations of trident production, $e^-\rightarrow e^-e^+e^-$, in a strong electromagnetic field. The experiment was conducted at CERN for the purpose of probing the strong-field parameter $\chi$ up to 2.4, using a 200 GeV electron beam penetrating a 400 $\mu$m thick germanium crystal oriented along the $\langle 110\rangle$ axis. <a href="http://cds.cern.ch/record/2875156" class="titlelink">[...] </a></small><br /> <small class="quicknote">arXiv:2307.03464.- </small> <small>2023-09-01 - 29 p. </small> - Published in : <a href="http://dx.doi.org/10.1103/PhysRevD.108.052013"><i>Phys. Rev. D</i> 108 (2023) 052013</a> </a> <strong>Fulltext:</strong> <em>Publication</em> - <a href="/record/2875156/files/Publication.pdf">PDF</a>; <em>2307.03464</em> - <a href="/record/2875156/files/2307.03464.pdf">PDF</a>;  </td> </tr> </table> <br /><span class="moreinfo"><a href="/record/2875156?ln=pt" class="moreinfo">Registo detalhado</a> - <a href="/search?ln=pt&p=recid%3A2875156&rm=wrd" class="moreinfo">Registos similares</a></span> </td> </tr> <tr> <td class="latestadditionsboxtimebody">2023-01-26<br />08:56</td> <td class="latestadditionsboxrecordbody"> <abbr class="unapi-id" title="2847545"></abbr>  <table cellspacing="0" cellpadding="0" border="0"> <tr> <td valign="top" align="left"> <strong><a href="http://cds.cern.ch/record/2847545?ln=en" class="titlelink">Precision Measurement of Trident Production in Strong Electromagnetic Fields</a></strong> / <a href="http://cds.cern.ch/search?f=author&p=Nielsen%2C%20Christian%20F.&ln=en">Nielsen, Christian F.</a> (Aarhus U.) ; <a href="http://cds.cern.ch/search?f=author&p=Holtzapple%2C%20Robert&ln=en">Holtzapple, Robert</a> (Cal. Poly.) ; <a href="http://cds.cern.ch/search?f=author&p=Lund%2C%20Mads%20M.&ln=en">Lund, Mads M.</a> (Aarhus U.) ; <a href="http://cds.cern.ch/search?f=author&p=Surrow%2C%20Jeppe%20H.&ln=en">Surrow, Jeppe H.</a> (Aarhus U.) ; <a href="http://cds.cern.ch/search?f=author&p=S%C3%B8rensen%2C%20Marc%20B.&ln=en">Sørensen, Marc B.</a> (Aarhus U.) ; <a href="http://cds.cern.ch/search?f=author&p=Uggerh%C3%B8j%2C%20Ulrik%20I.&ln=en">Uggerhøj, Ulrik I.</a> (Aarhus U.) /NA63 Collaboration <br /> <small>We demonstrate experimentally that the trident process $e^-\rightarrow e^-e^+e^-$ in a strong external field, with a spatial extension comparable to the effective radiation length, is well understood theoretically. The experiment, conducted at CERN, probes values for the strong field parameter $\chi$ up to 2.4. <a href="http://cds.cern.ch/record/2847545" class="titlelink">[...] </a></small><br /> <small class="quicknote">arXiv:2211.02390.- </small> <small>2023-02-14 - 5 p. </small> - Published in : <a href="http://dx.doi.org/10.1103/PhysRevLett.130.071601"><i>Phys. Rev. Lett.</i> 130 (2023) 071601</a> </a> <strong>Fulltext:</strong> <em>2211.02390</em> - <a href="/record/2847545/files/2211.02390.pdf">PDF</a>; <em>Publication</em> - <a href="/record/2847545/files/Publication.pdf">PDF</a>;  </td> </tr> </table> <br /><span class="moreinfo"><a href="/record/2847545?ln=pt" class="moreinfo">Registo detalhado</a> - <a href="/search?ln=pt&p=recid%3A2847545&rm=wrd" class="moreinfo">Registos similares</a></span> </td> </tr> <tr> <td class="latestadditionsboxtimebody">2021-08-19<br />06:36</td> <td class="latestadditionsboxrecordbody"> <abbr class="unapi-id" title="2778801"></abbr>  <table cellspacing="0" cellpadding="0" border="0"> <tr> <td valign="top" align="left"> <strong><a href="http://cds.cern.ch/record/2778801?ln=en" class="titlelink">Experimental verification of the Landau–Lifshitz equation</a></strong> / <a href="http://cds.cern.ch/search?f=author&p=Nielsen%2C%20C%20F&ln=en">Nielsen, C F</a> (Aarhus U.) ; <a href="http://cds.cern.ch/search?f=author&p=Justesen%2C%20J%20B&ln=en">Justesen, J B</a> (Aarhus U.) ; <a href="http://cds.cern.ch/search?f=author&p=S%C3%B8rensen%2C%20A%20H&ln=en">Sørensen, A H</a> (Aarhus U.) ; <a href="http://cds.cern.ch/search?f=author&p=Uggerh%C3%B8j%2C%20U%20I&ln=en">Uggerhøj, U I</a> (Aarhus U.) ; <a href="http://cds.cern.ch/search?f=author&p=Holtzapple%2C%20R&ln=en">Holtzapple, R</a> (Cal. Poly.) /CERN NA63 Collaboration <br /> <small>The Landau–Lifshitz (LL) equation has been proposed as the classical equation to describe the dynamics of a charged particle in a strong electromagnetic field when influenced by radiation reaction. Until recently, there has been no clear experimental verification. [...] </small><br /> <small class="quicknote"> </small> <small>2021 - 8 p. </small> - Published in : <a href="http://dx.doi.org/10.1088/1367-2630/ac1554"><i>New J. Phys.</i> 23 (2021) 085001</a> </a> <strong>Fulltext:</strong> <a href="/record/2778801/files/document.pdf">PDF</a>;  </td> </tr> </table> <br /><span class="moreinfo"><a href="/record/2778801?ln=pt" class="moreinfo">Registo detalhado</a> - <a href="/search?ln=pt&p=recid%3A2778801&rm=wrd" class="moreinfo">Registos similares</a></span> </td> </tr> <tr> <td class="latestadditionsboxtimebody">2018-03-23<br />11:42</td> <td class="latestadditionsboxrecordbody"> <abbr class="unapi-id" title="2310140"></abbr>  <table cellspacing="0" cellpadding="0" border="0"> <tr> <td valign="top" align="left"> <strong><a href="http://cds.cern.ch/record/2310140?ln=en" class="titlelink">Measurements and theories of the King–Perkins–Chudakov effect</a></strong> / <a href="http://cds.cern.ch/search?f=author&p=Thomsen%2C%20H%20D&ln=en">Thomsen, H D</a> (Aarhus U., ISA) ; <a href="http://cds.cern.ch/search?f=author&p=Uggerh%C3%B8j%2C%20U%20I&ln=en">Uggerhøj, U I</a> (Aarhus U.) <br /> <small>We discuss the available experimental results, based on cosmic rays as well as laboratory measurements, for the King–Perkins–Chudakov (KPC) effect where pairs – when detected close to the creation vertex – suffer a reduced energy loss due to the internal screening of the charges constituting the pair. It is shown that the overall best description of data is obtained from the original theoretical expression by Chudakov based on classical electrodynamics, or the semi-classical extension by Burkhardt. [...] </small><br /> <small class="quicknote"> </small> <small>2011 - 6 p. </small> - Published in : <a href="http://dx.doi.org/10.1016/j.nimb.2011.05.019"><i>Nucl. Instrum. Methods Phys. Res., B</i> 269 (2011) 1919-1924</a> </a> </td> </tr> </table> <br /><span class="moreinfo"><a href="/record/2310140?ln=pt" class="moreinfo">Registo detalhado</a> - <a href="/search?ln=pt&p=recid%3A2310140&rm=wrd" class="moreinfo">Registos similares</a></span> </td> </tr> <tr> <td class="latestadditionsboxtimebody">2018-03-23<br />11:41</td> <td class="latestadditionsboxrecordbody"> <abbr class="unapi-id" title="2310088"></abbr>  <table cellspacing="0" cellpadding="0" border="0"> <tr> <td valign="top" align="left"> <strong><a href="http://cds.cern.ch/record/2310088?ln=en" class="titlelink">Radiation emission as a virtually exact realization of Heisenbergs microscope</a></strong> / <a href="http://cds.cern.ch/search?f=author&p=Andersen%2C%20K%20K&ln=en">Andersen, K K</a> (Aarhus U.) ; <a href="http://cds.cern.ch/search?f=author&p=Brock%2C%20S&ln=en">Brock, S</a> (Aarhus U. (main)) ; <a href="http://cds.cern.ch/search?f=author&p=Esberg%2C%20J&ln=en">Esberg, J</a> (Aarhus U.) ; <a href="http://cds.cern.ch/search?f=author&p=Thomsen%2C%20H%20D&ln=en">Thomsen, H D</a> (Aarhus U.) ; <a href="http://cds.cern.ch/search?f=author&p=Uggerh%C3%B8j%2C%20U%20I&ln=en">Uggerhøj, U I</a> (Aarhus U.) <br /> <small>Through the concept of ‘formation length’, recently observed directly in the radiation emission from ultrarelativistic electrons and an essential component in the interpretation of strong field radiation from electrons penetrating single crystals, we discuss the indeterminacy in the location of radiation emission. The analogy with the indeterminacy in the Heisenberg microscope Gedanken experiment is demonstrated from a number of viewpoints to be almost exact. [...] </small><br /> <small class="quicknote"> </small> <small>2013 - 5 p. </small> - Published in : <a href="http://dx.doi.org/10.1016/j.nimb.2013.03.041"><i>Nucl. Instrum. Methods Phys. Res., B</i> 315 (2013) 278-282</a> </a> </td> </tr> </table> <br /><span class="moreinfo"><a href="/record/2310088?ln=pt" class="moreinfo">Registo detalhado</a> - <a href="/search?ln=pt&p=recid%3A2310088&rm=wrd" class="moreinfo">Registos similares</a></span> </td> </tr> <tr> <td class="latestadditionsboxtimebody">2018-03-23<br />11:41</td> <td class="latestadditionsboxrecordbody"> <abbr class="unapi-id" title="2310087"></abbr>  <table cellspacing="0" cellpadding="0" border="0"> <tr> <td valign="top" align="left"> <strong><a href="http://cds.cern.ch/record/2310087?ln=en" class="titlelink">Vacuum birefringence by Compton backscattering through a strong field</a></strong> / <a href="http://cds.cern.ch/search?f=author&p=Wistisen%2C%20Tobias%20N&ln=en">Wistisen, Tobias N</a> (Aarhus U.) ; <a href="http://cds.cern.ch/search?f=author&p=Uggerh%C3%B8j%2C%20Ulrik%20I&ln=en">Uggerhøj, Ulrik I</a> (Aarhus U.) <br /> <small>We propose a novel scheme to measure nonlinear effects in electrodynamics arising from QED corrections. Our theoretical starting point is the Heisenberg-Euler-Schwinger effective Lagrangian which predicts that a vacuum with a strong static electromagnetic field turns birefringent. [...] </small><br /> <small class="quicknote"> </small> <small>2013 - 6 p. </small> - Published in : <a href="http://dx.doi.org/10.1103/PhysRevD.88.053009"><i>Phys. Rev. D</i> 88 (2013) 053009</a> </a> </td> </tr> </table> <br /><span class="moreinfo"><a href="/record/2310087?ln=pt" class="moreinfo">Registo detalhado</a> - <a href="/search?ln=pt&p=recid%3A2310087&rm=wrd" class="moreinfo">Registos similares</a></span> </td> </tr> <tr> <td class="latestadditionsboxtimebody">2018-03-23<br />11:41</td> <td class="latestadditionsboxrecordbody"> <abbr class="unapi-id" title="2310085"></abbr>  <table cellspacing="0" cellpadding="0" border="0"> <tr> <td valign="top" align="left"> <strong><a href="http://cds.cern.ch/record/2310085?ln=en" class="titlelink">Implementation of the LPM effect in the discrete-bremsstrahlung simulation of GEANT3 and GEANT4</a></strong> / <a href="http://cds.cern.ch/search?f=author&p=Mangiarotti%2C%20A&ln=en">Mangiarotti, A</a> (LIP, Coimbra) ; <a href="http://cds.cern.ch/search?f=author&p=Ballestrero%2C%20S&ln=en">Ballestrero, S</a> (Witwatersrand U.) ; <a href="http://cds.cern.ch/search?f=author&p=Sona%2C%20P&ln=en">Sona, P</a> (Florence U.) ; <a href="http://cds.cern.ch/search?f=author&p=Uggerhoj%2C%20Ulrik%20Ingerslev&ln=en">Uggerhoj, Ulrik Ingerslev</a> (Aarhus U.) <br /> <small>Experimental data, recently measured at CERN, on the LPM effect have been used to benchmark the description of the discrete bremsstrahlung incorporated into the GEANT 3 and GEANT 4 codes. The limited accuracy of the native versions required a major revision in the framework of the original Migdal theory. [...] </small><br /> <small class="quicknote"> </small> <small>2008 - 7 p. </small> - Published in : <a href="http://dx.doi.org/10.1016/j.nimb.2008.09.009"><i>Nucl. Instrum. Methods Phys. Res., B</i> 266 (2008) 5013-5019</a> </a> </td> </tr> </table> <br /><span class="moreinfo"><a href="/record/2310085?ln=pt" class="moreinfo">Registo detalhado</a> - <a href="/search?ln=pt&p=recid%3A2310085&rm=wrd" class="moreinfo">Registos similares</a></span> </td> </tr> <tr> <td class="latestadditionsboxtimebody">2018-03-16<br />08:03</td> <td class="latestadditionsboxrecordbody"> <abbr class="unapi-id" title="2308772"></abbr>  <table cellspacing="0" cellpadding="0" border="0"> <tr> <td valign="top" align="left"> <strong><a href="http://cds.cern.ch/record/2308772?ln=en" class="titlelink">Experimental evidence of quantum radiation reaction in aligned crystals</a></strong> / <a href="http://cds.cern.ch/search?f=author&p=Wistisen%2C%20Tobias%20N.&ln=en">Wistisen, Tobias N.</a> (Aarhus U.) ; <a href="http://cds.cern.ch/search?f=author&p=Di%20Piazza%2C%20Antonino&ln=en">Di Piazza, Antonino</a> (Heidelberg, Max Planck Inst.) ; <a href="http://cds.cern.ch/search?f=author&p=Knudsen%2C%20Helge%20V.&ln=en">Knudsen, Helge V.</a> (Aarhus U.) ; <a href="http://cds.cern.ch/search?f=author&p=Uggerh%C3%B8j%2C%20Ulrik%20I.&ln=en">Uggerhøj, Ulrik I.</a> (Aarhus U.) <br /> <small>Radiation reaction is the influence of the electromagnetic field emitted by a charged particle on the dynamics of the particle itself. Here we report experimental radiation emission spectra from ultrarelativistic positrons in silicon in a regime where both quantum and radiation-reaction effects dominate the dynamics of the positrons. <a href="http://cds.cern.ch/record/2308772" class="titlelink">[...] </a></small><br /> <small class="quicknote">arXiv:1704.01080.- </small> <small>2018-02-23 - 14 p. </small> - Published in : <a href="http://dx.doi.org/10.1038/s41467-018-03165-4"><i>Nature Commun.</i> 9 (2018) 795</a> </a> <strong>Fulltext:</strong> <em>arXiv:1704.01080</em> - <a href="/record/2308772/files/arXiv:1704.01080.pdf">PDF</a>; <em>s41467-018-03165-4</em> - <a href="/record/2308772/files/s41467-018-03165-4.pdf">PDF</a>;  </td> </tr> </table> <br /><span class="moreinfo"><a href="/record/2308772?ln=pt" class="moreinfo">Registo detalhado</a> - <a href="/search?ln=pt&p=recid%3A2308772&rm=wrd" class="moreinfo">Registos similares</a></span> </td> </tr> <tr> <td class="latestadditionsboxtimebody">2016-03-02<br />14:24</td> <td class="latestadditionsboxrecordbody"> <abbr class="unapi-id" title="2135818"></abbr>  <table cellspacing="0" cellpadding="0" border="0"> <tr> <td valign="top" align="left"> <strong><a href="http://cds.cern.ch/record/2135818?ln=en" class="titlelink">Measurements of the spectral location of the structured target resonance for ultrarelativistic electrons</a></strong> / CERN NA63 Collaboration <br /> <small class="quicknote"> </small> <small>2014 - 6 p. </small> - Published in : <a href="http://dx.doi.org/10.1016/j.physletb.2014.03.055"><i>Phys. Lett. B</i> 732 (2014) 309-314</a> </a> <strong>Elsevier Open Access article:</strong> <a href="/record/2135818/files/scoap3-fulltext.pdf">PDF</a>;  </td> </tr> </table> <br /><span class="moreinfo"><a href="/record/2135818?ln=pt" class="moreinfo">Registo detalhado</a> - <a href="/search?ln=pt&p=recid%3A2135818&rm=wrd" class="moreinfo">Registos similares</a></span> </td> </tr> <tr> <td class="latestadditionsboxtimebody">2015-03-25<br />18:44</td> <td class="latestadditionsboxrecordbody"> <abbr class="unapi-id" title="2004201"></abbr>  <table cellspacing="0" cellpadding="0" border="0"> <tr> <td valign="top" align="left"> <strong><a href="http://cds.cern.ch/record/2004201?ln=en" class="titlelink">Investigation of classical radiation reaction with aligned crystals</a></strong> / <a href="http://cds.cern.ch/search?f=author&p=Di%20Piazza%2C%20A.&ln=en">Di Piazza, A.</a> (Heidelberg, Max Planck Inst.) ; <a href="http://cds.cern.ch/search?f=author&p=Wistisen%2C%20Tobias%20N.&ln=en">Wistisen, Tobias N.</a> (Aarhus U.) ; <a href="http://cds.cern.ch/search?f=author&p=Uggerh%C3%B8j%2C%20Ulrik%20I.&ln=en">Uggerhøj, Ulrik I.</a> (Aarhus U.) <br /> <small>Classical radiation reaction is the effect of the electromagnetic field emitted by an accelerated electric charge on the motion of the charge itself. The self-consistent underlying classical equation of motion including radiation-reaction effects, the Landau-Lifshitz equation, has never been tested experimentally, in spite of the first theoretical treatments of radiation reaction having been developed more than a century ago. [...] </small><br /> <small class="quicknote">arXiv:1503.05717.- </small> <small>2017-02-10 - 5 p. </small> - Published in : <a href="http://dx.doi.org/10.1016/j.physletb.2016.10.083"><i>Phys. Lett. B</i> 765 (2017) 1-5</a> </a> <strong>Article from SCOAP3:</strong> <a href="/record/2004201/files/scoap3-fulltext.pdf">PDF</a>; <strong>Fulltext:</strong> <a href="/record/2004201/files/arXiv:1503.05717.pdf">PDF</a>; <strong>External link</strong>: <a href="http://arxiv.org/pdf/1503.05717.pdf">Preprint</a> </td> </tr> </table> <br /><span class="moreinfo"><a href="/record/2004201?ln=pt" class="moreinfo">Registo detalhado</a> - <a href="/search?ln=pt&p=recid%3A2004201&rm=wrd" class="moreinfo">Registos similares</a></span> </td> </tr></table><div align="right"><small><a href="/search?cc=NA63+Papers&ln=pt&as=1&jrec=11">[>> mais]</a></small></div></td> </tr> </tbody> </table></td> </tr></table> </form> </div> <div class="clear"></div> </div> <footer id="footer" class="pagefooter clearfix">  <div class="pagefooterstripeleft"> CERN Document Server :: <a class="footer" href="http://cds.cern.ch/?ln=pt">Pesquisar</a> :: <a class="footer" href="http://cds.cern.ch/submit?ln=pt">Submeter</a> :: <a class="footer" href="https://cds.cern.ch/youraccount/display?ln=pt">Personalizar</a> :: <a class="footer" href="http://cds.cern.ch/help/?ln=pt">Ajuda</a> :: <a class="footer" href="https://cern.service-now.com/service-portal?id=privacy_policy&se=CDS-Service" target="_blank">Privacy Notice</a> :: <a class="footer" href="https://repository.cern/content-policy" target="_blank">Content Policy</a> :: <a class="footer" href="https://repository.cern/terms" target="_blank">Terms and Conditions</a> <br /> Powered by <a class="footer" href="http://invenio-software.org/">Invenio</a> <br /> Mantido por <a class="footer" href="https://cern.service-now.com/service-portal?id=service_element&name=CDS-Service">CDS Service</a> - Need help? 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