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Title: Transport and spatial energy deposition of relativistic electrons in copper-doped fast ignition plasmas

Fast electron transport and spatial energy deposition are investigated in integrated cone-guided Fast Ignition experiments by measuring fast electron induced copper K-shell emission using a copper tracer added to deuterated plastic shells with a geometrically reentrant gold cone. Experiments were carried out at the Laboratory for Laser Energetics on the OMEGA/OMEGA-EP Laser where the plastic shells were imploded using 54 of the 60 OMEGA60 beams (3ω, 20 kJ), while the high intensity OMEGA-EP (BL2) beam (1 ω, 10 ps, 500 J, I peak > 10 19 W/cm 2) was focused onto the inner cone tip. Here, a retrograde analysis using the hybrid-PIC electron transport code, ZUMA, is performed to examine the sensitivity of the copper Kα spatial profile on the laser-produced fast electrons, facilitating the optimization of new target point designs and laser configurations to improve the compressed core areal density by a factor of 4 and the fast electron energy coupling by a factor of 3.5.
Authors:
ORCiD logo [1] ; ORCiD logo [2] ;  [2] ;  [3] ;  [3] ;  [2] ;  [3] ;  [3] ;  [4] ; ORCiD logo [3] ;  [4] ;  [5] ;  [3] ;  [6] ;  [6] ;  [4] ;  [5] ;  [3] ; ORCiD logo [4] ;  [3] more »;  [4] ;  [7] ; ORCiD logo [8] ; ORCiD logo [5] ;  [6] ;  [5] « less
  1. Univ. of California San Diego, La Jolla, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of California San Diego, La Jolla, CA (United States)
  3. Univ. of Rochester, Rochester, NY (United States)
  4. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  5. General Atomics, San Diego, CA (United States)
  6. Osaka Univ., Osaka (Japan)
  7. Univ. of Bordeaux, Talence (France)
  8. Univ. of Nevada, Reno, NV (United States)
Publication Date:
Report Number(s):
LLNL-JRNL-736430
Journal ID: ISSN 1070-664X
Grant/Contract Number:
AC52-07NA27344; FC02-04ER54789; FG02-05ER54834; NA0000854
Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 24; Journal Issue: 10; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 70 PLASMA PHYSICS AND FUSION
OSTI Identifier:
1411681
Alternate Identifier(s):
OSTI ID: 1402528