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Title: Highly collimated monoenergetic target-surface electron acceleration in near-critical-density plasmas

Optimized-quality monoenergetic target surface electron beams at MeV level with low normalized emittance (0.03π mm mrad) and high charge (30 pC) per shot have been obtained from 3 TW laser-solid interactions at a grazing incidence. The 2-Dimension particle-in-cell simulations suggest that electrons are wake-field accelerated in a large-scale, near-critical-density preplasma. It reveals that a bubble-like structure as an accelerating cavity appears in the near-critical-density plasma region and travels along the target surface. A bunch of electrons are pinched transversely and accelerated longitudinally by the wake field in the bubble. The outstanding normalized emittance and monochromaticity of such highly collimated surface electron beams could make it an ideal beam for fast ignition or may serve as an injector in traditional accelerators.
Authors:
 [1] ;  [2] ;  [1] ;  [3] ; ; ; ; ; ;  [1] ;  [1] ;  [3] ;  [4] ;  [5]
  1. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, CAS, Beijing 100190 (China)
  2. (Germany)
  3. (China)
  4. Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, Kaiserslautern 67663 (Germany)
  5. Laboratory for Laser Plasmas (Ministry of Education) and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240 (China)
Publication Date:
OSTI Identifier:
22398800
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 13; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 43 PARTICLE ACCELERATORS; ACCELERATION; BEAM EMITTANCE; COMPUTERIZED SIMULATION; ELECTRON BEAMS; ELECTRONS; INCIDENCE ANGLE; LASER TARGETS; LASER-PRODUCED PLASMA; LASERS; MEV RANGE; PLASMA DENSITY; PLASMA SIMULATION; SOLIDS; SURFACES; TERAWATT POWER RANGE; WAKEFIELD ACCELERATORS