Author: Gaikwad, A.S.
Paper Title Page
WEZE6
 Characterization of the Fields Inside the CO2-Laser-Driven Wakefield Accelerators Using Relativistic Electron Beams  
 
  • I. Petrushina
    SUNY SB, Stony Brook, New York, USA
  • M. Babzien, M.G. Fedurin, K. Kusche, M.A. Palmer, I. Pogorelsky, M.N. Polyanskiy
    BNL, Upton, New York, USA
  • M. Downer, R. Zgadzaj
    The University of Texas at Austin, Austin, Texas, USA
  • A.S. Gaikwad, V. Litvinenko, N. Vafaei-Najafabadi
    Stony Brook University, Stony Brook, USA
  • C. Joshi, W.B. Mori, C. Zhang
    UCLA, Los Angeles, California, USA
  • R. Kupfer
    LLNL, Livermore, USA
  • V. Samulyak
    SBU, Stony Brook, USA
  
  The CO2 laser at the Ac­cel­er­a­tor Test Fa­cil­ity of Brookhaven Na­tional Lab­o­ra­tory is a unique source gen­er­at­ing 2-ps-long, multi-TW pulses in the mid-IR regime. This rapidly evolv­ing sys­tem opens an op­por­tu­nity for the gen­er­a­tion of large bub­bles in low-den­sity plas­mas (~1016 cm-3) that are ideal for ac­cel­er­a­tion of ex­ter­nally in­jected elec­tron beams. A new gen­er­a­tion of di­ag­nos­tic tools is needed to char­ac­ter­ize the fields in­side such struc­tures and to im­prove the means of ex­ter­nal in­jec­tion. In re­cent years, the elec­tron beam prob­ing tech­nique has shown to be suc­cess­ful in di­rect vi­su­al­iza­tion of the plasma wake­fields. Here we pre­sent a new method uti­liz­ing the elec­tron beam prob­ing and Trans­mis­sion Elec­tron Mi­croscopy (TEM) grids that will allow us to se­lec­tively il­lu­mi­nate dif­fer­ent por­tions of the wake and to char­ac­ter­ize the elec­tric field strength within the wake based on the lo­ca­tion of the focal point of the probe beam­lets. The an­a­lyt­i­cal eval­u­a­tion of the ap­proach and sup­port­ing sim­u­la­tion re­sults will be pre­sented and dis­cussed.  
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