Author: Thomas, J.
Paper Title Page
SUPAF05 Polarized Proton Beams From Laser-Induced Plasmas 46
 
  • M. Büscher, J. Böker, R. Engels, I. Engin, R. Gebel, A. Hützen, A. Lehrach
    FZJ, Jülich, Germany
  • A.M. Pukhov, J. Thomas
    HHUD, Dusseldorf, Germany
  • T. P. Rakitzis, D. Sofikitis
    University of Crete, Heraklion, Crete, Greece
 
  Laser-dri­ven par­ti­cle ac­cel­er­a­tion has un­der­gone im­pres­sive progress in re­cent years. Nev­er­the­less, one un­ex­plored issue is how the par­ti­cle spins are in­flu­enced by the huge mag­netic fields in­her­ently pre­sent in the plas­mas. In the frame­work of the JuS­PARC (Jülich Short-Pulse Par­ti­cle and Ra­di­a­tion Cen­ter) fa­cil­ity and of the ATHENA con­sor­tium, the laser-dri­ven gen­er­a­tion of po­lar­ized par­ti­cle beams in com­bi­na­tion with the de­vel­op­ment of ad­vanced tar­get tech­nolo­gies is being pur­sued. In order to pre­dict the de­gree of beam po­lar­iza­tion from a laser-dri­ven plasma ac­cel­er­a­tor, par­ti­cle-in-cell sim­u­la­tions in­clud­ing spin ef­fects have been car­ried out for the first time. For this pur­pose, the Thomas-BMT equa­tion, de­scrib­ing the spin pre­ces­sion in elec­tro­mag­netic fields, has been im­ple­mented into the VLPL (Vir­tual Laser Plasma Lab) code. A cru­cial re­sult of our sim­u­la­tions is that a tar­get con­tain­ing pre-po­lar­ized hy­dro­gen nu­clei is needed for pro­duc­ing highly po­lar­ized rel­a­tivis­tic pro­ton beams. For the ex­per­i­men­tal re­al­iza­tion, a po­lar­ized HCl gas-jet tar­get is under con­struc­tion the Forschungszen­trum Jülich where the de­gree of hy­dro­gen po­lar­iza­tion is mea­sured with a Lamb-shift po­larime­ter. The final ex­per­i­ments, aim­ing at the first ob­ser­va­tion of a po­lar­ized par­ti­cle beam from laser-gen­er­ated plas­mas, will be car­ried out at the 10 PW laser sys­tem SULF at SIOM/Shang­hai.  
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DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICAP2018-SUPAF05  
About • paper received ※ 19 October 2018       paper accepted ※ 24 October 2018       issue date ※ 26 January 2019  
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