A table-top laser-based source of short, collimated, ultra-relativistic positron beams
Contribuinte(s) |
Esarey, E Schroeder, CB Leemans, WP Ledingham, KWD Jaroszynski, DA |
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Data(s) |
01/12/2013
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Resumo |
<p>An ultra-relativistic electron beam passing through a thick, high-Z solid target triggers an electromagnetic cascade, whereby a large number of high energy photons and electron-positron pairs are produced. By exploiting this physical process, we present here the first experimental evidence of the generation of ultra-short, highly collimated and ultra-relativistic positron beams following the interaction of a laser-wake field accelerated electron beam with high-Z solid targets. Clear evidence has also been obtained of the generation of GeV electron-positron jets with variable composition depending on the solid target material and thickness. The percentage of positrons in the overall leptonic beam has been observed to vary from a few per cent up to almost fifty per cent, implying a quasi-neutral electron-positron beam. We anticipate that these beams will be of direct relevance to the laboratory study of astrophysical leptonic jets and their interaction with the interstellar medium.</p> |
Identificador |
http://dx.doi.org/10.1117/12.2018744 http://www.scopus.com/inward/record.url?scp=84880740474&partnerID=8YFLogxK |
Idioma(s) |
eng |
Publicador |
SPIE - INT SOC OPTICAL ENGINEERING |
Direitos |
info:eu-repo/semantics/restrictedAccess |
Fonte |
Sarri , G , Schumaker , W , Di Piazza , A , Vargas , M , Dromey , B , Dieckmann , M E , Chvykov , V , Maksimchuk , A , Yanovsky , V , He , Z H , Hou , B X , Nees , J A , Thomas , A G R , Keitel , C H , Zepf , M & Krushelnick , K 2013 , A table-top laser-based source of short, collimated, ultra-relativistic positron beams . in E Esarey , C B Schroeder , W P Leemans , K W D Ledingham & D A Jaroszynski (eds) , Proceedings of SPIE - The International Society for Optical Engineering . vol. 8779 , 87790Z , Proceedings of SPIE , vol. 8779 , SPIE - INT SOC OPTICAL ENGINEERING , BELLINGHAM , Laser Acceleration of Electrons, Protons, and Ions II; and Medical Applications of Laser-Generated Beams of Particles II; and Harnessing Relativistic Plasma Waves III , Prague , Czech Republic , 15-18 April . DOI: 10.1117/12.2018744 |
Palavras-Chave | #pair production #electron-positron beams #laser #astrophysical jets #ELECTRON-BEAMS #GENERATION #ACCELERATION #FEMTOSECOND #SHOCK |
Tipo |
contributionToPeriodical |