Bright betatron radiation from direct-laseraccelerated electrons at moderate relativistic laser intensity

作     者：O.N.Rosmej X.F.Shen A.Pukhov L.Antonelli F.Barbato M.Gyrdymov M.M.Gunther S.Zahter V.S.Popov N.G.Borisenko N.E.Andreev 

作者机构：GSI Helmholtzzentrum fur Schwerionenforschung GmbHPlanckstraße164291 DarmstadtGermany Goethe UniversityFrankfurtMax-von-Laue-Straße 160438 Frankfurt am MainGermany Helmholtz Forschungsakademie Hessen fur FAIR(HFHF)Campus Frankfurt am MainMax-von-Laue-Straße 1260438 Frankfurt am MainGermany Heinrich-Heine-University DusseldorfUniversitatsstraße 1DusseldorfGermany York Plasma InstituteUniversity of YorkChurch LaneHeslingtonYork YO105DQUnited Kingdom University of BordeauxCNRSCEACELIAUMR 5107F-33405 TalenceFrance Joint Institute for High TemperaturesRASIzhorskaya St.13Bldg.2125412 MoscowRussia Moscow Institute of Physics and Technology(State University)Institutskiy Pereulok 9141700 DolgoprudnyMoscow RegionRussia P.N.Lebedev Physical InstituteRASLeninsky Prospekt 53119991 MoscowRussia 

出 版 物：《Matter and Radiation at Extremes》 (极端条件下的物质与辐射（英文）)

年 卷 期：2021年第6卷第4期

页      面：10-17页

核心收录：

学科分类：080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0803[工学-光学工程] 

基　　金：the DFG(Project No.PU 213/9),EPSRC Grant No.EP/P026796/1 the Ministry of Science and Higher Education of the Russian Federation(Agreement with Joint Institute for High Temperatures RAS No 075-15-2020-785,dated September 23,2020) 

主　　题：intensity relativistic critical 

摘      要：Direct laser acceleration(DLA)of electrons in a plasma of near-critical electron density(NCD)and the associated synchrotron-like radiation are discussed for moderate relativistic laser intensity(normalized laser amplitude a0≤4.3)and ps length *** regime is typical of kJ PW-class laser facilities designed for high-energy-density(HED)*** experiments at the PHELIX facility,it has been demonstrated that interaction of a 1019 W/cm2 sub-ps laser pulse with a sub-mm length NCD plasma results in the generation of high-current well-directed superponderomotive electrons with an effective temperature ten times higher than the ponderomotive potential[Rosmej et al.,Plasma *** Fusion 62,115024(2020)].Three-dimensional particle-in-cell simulations provide good agreement with the measured electron energy distribution and are used in the current work to study synchrotron radiation from the DLA-accelerated *** resulting x-ray spectrum with a critical energy of 5 keV reveals an ultrahigh photon number of 731011 in the 1–30 keV photon energy range at the focused laser energy of 20 *** simulations of betatron x-ray phase contrast imaging based on the DLA process for the parameters of a PHELIX laser are *** results are of interest for applications in HED experiments,which require a ps x-ray pulse and a high photon flux.