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Title: Numerically optimized structures for dielectric asymmetric dual-grating laser accelerators

Optical scale dielectric structures are promising candidates to realize future compact, low cost particle accelerators, since they can sustain high acceleration gradients in the range of GeV/m. Here, we present numerical simulation results for a dielectric asymmetric dual-grating accelerator. It was found that the asymmetric dual-grating structures can efficiently modify the laser field to synchronize it with relativistic electrons, therefore increasing the average acceleration gradient by ∼10% in comparison to symmetric structures. The optimum pillar height which was determined by simulation agrees well with that estimated analytically. The effect of the initial kinetic energy of injected electrons on the acceleration gradient is also discussed. Finally, the required laser parameters were calculated analytically and a suitable laser is proposed as energy source.
Authors:
 [1] ;  [2] ;  [2] ; ; ;  [1] ;  [3] ;  [2] ; ;  [3] ;  [2] ; ;  [4] ; ;  [5]
  1. Key Laboratory of Beam Technology and Materials Modification of the Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875 (China)
  2. (United Kingdom)
  3. Cockcroft Institute, Daresbury Sci-Tech, Warrington WA44AD (United Kingdom)
  4. Department of Nuclear Engineering and Management, The University of Tokyo, Tokai 319-1188 (Japan)
  5. High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801 (Japan)
Publication Date:
OSTI Identifier:
22252056
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 2; Other Information: (c) 2014 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; ACCELERATION; ACCELERATORS; ASYMMETRY; COMPUTERIZED SIMULATION; DIELECTRIC MATERIALS; ELECTRONS; GRATINGS; LASER RADIATION; LASERS; RELATIVISTIC RANGE