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Title: Note: A monoenergetic proton backlighter for the National Ignition Facility

Here, a monoenergetic, isotropic proton source suitable for proton radiography applications has been demonstrated at the National Ignition Facility (NIF). A deuterium and helium-3 gas-filled glass capsule was imploded with 39 kJ of laser energy from 24 of NIF’s 192 beams. Spectral, spatial, and temporal measurements of the 15-MeV proton product of the 3He(d,p)4He nuclear reaction reveal a bright (1010 protons/sphere), monoenergetic (ΔE/E = 4%) spectrum with a compact size (80 µm) and isotropic emission (~13% proton fluence variation and <0.4% mean energy variation). Simultaneous measurements of products produced by the D(d,p)T and D(d,n)3He reactions also show 2 × 1010 isotropically distributed 3-MeV protons.
Authors:
 [1] ; ORCiD logo [2] ;  [3] ;  [1] ;  [1] ; ORCiD logo [4] ;  [4] ;  [4] ;  [3] ;  [1] ; ORCiD logo [3] ;  [4] ; ORCiD logo [3] ;  [5] ;  [6] ;  [1] ; ORCiD logo [3]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  4. Univ. of Rochester, Rochester, NY (United States)
  5. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  6. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Univ. of Rochester, Rochester, NY (United States)
Publication Date:
OSTI Identifier:
1225816
Grant/Contract Number:
NA0001857; AC52-07NA27344; NA0002949
Type:
Published Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 86; Journal Issue: 11; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Research Org:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; protons; Helium-3; x-ray imaging; emission spectra; plasma temperature