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Title: Guiding and collimating fast electron beam by the quasi-static electromagnetic field array

A guidance and collimation scheme for fast electron beam in a traverse periodic quasi-static electromagnetic field array is proposed with the semi-analytic method and the particle-in-cell simulation. The sheath electric fields on the surfaces of nanowires and the magnetic fields around the nanowires form a traverse periodic quasi-static electromagnetic field array. Therefore, most of the fast electrons are confined at the nanowire surfaces and transport forward. More importantly, due to the divergent property of the beams, the magnitudes of the generated fields decrease with the target depth. The lateral momenta of the electrons convert into the forward momenta through Lorenz force, and they cannot recover their initial values. Therefore, the fast electrons can be guided and collimated efficiently in the gaps between the nanowires. In our particle-in-cell simulations, the observed guiding efficiency exceeds 80% compared with the reference target.
Authors:
 [1] ;  [2] ; ; ; ; ; ; ; ; ;  [3] ;  [4]
  1. Physics Department, Fudan University, Shanghai 210433 (China)
  2. (China)
  3. Science and Technology on Plasma Physics Laboratory, Mianyang 621900 (China)
  4. Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China)
Publication Date:
OSTI Identifier:
22299708
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 10; 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; EFFICIENCY; ELECTRIC FIELDS; ELECTROMAGNETIC FIELDS; ELECTRON BEAMS; ELECTRONS; MAGNETIC FIELDS; QUANTUM WIRES; SIMULATION; SURFACES