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Title: Collective effects on the wakefield and stopping power of an ion beam pulse in plasmas

A two-dimensional (2D) particle-in-cell simulation is carried out to study the collective effects on the wakefield and stopping power for a hydrogen ion beam pulse propagation in hydrogen plasmas. The dependence of collective effects on the beam velocity and density is obtained and discussed. For the beam velocity, it is found that the collective effects have the strongest impact on the wakefield as well as the stopping power in the case of the intermediate beam velocities, in which the stopping power is also the largest. For the beam density, it is found that at low beam densities, the collective contribution to the stopping power increase linearly with the increase of the beam density, which corresponds well to the results calculated using the dielectric theory. However, at high beam densities, our results show that after reaching a maximum value, the collective contribution to the stopping power starts to decrease significantly with the increase of the beam density. Besides, at high beam densities, the wakefield loses typical V-shaped cone structures, and the wavelength of the oscillation wakefield increases as the beam density increases.
Authors:
 [1] ;  [2] ; ; ; ;  [1] ;  [1] ;  [2]
  1. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000 and Joint Laboratory of Atomic and Molecular Physics of NWNU and IMP CAS, Northwest Normal University, Lanzhou 730070 (China)
  2. (China)
Publication Date:
OSTI Identifier:
22410336
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 5; 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; BEAM DYNAMICS; BEAM PULSERS; COMPUTERIZED SIMULATION; CONES; DIELECTRIC MATERIALS; HYDROGEN IONS; ION BEAMS; OSCILLATIONS; PARTIAL DIFFERENTIAL EQUATIONS; PLASMA; STOPPING POWER; TWO-DIMENSIONAL CALCULATIONS; WAKEFIELD ACCELERATORS; WAVELENGTHS