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Title: The influence of magnetic fields on the wake field and stopping power of an ion-beam pulse in plasmas

We performed two-dimensional particle-in-cell simulations to investigate how a magnetic field affects the wake field and stopping power of an ion-beam pulse moving in plasmas. The corresponding density of plasma electrons is investigated. At a weak magnetic field, the wakes exhibit typical V-shaped cone structures. As the magnetic field strengthens, the wakes spread and lose their typical V-shaped structures. At a sufficiently strong magnetic field, the wakes exhibit conversed V-shaped structures. Additionally, strengthening the magnetic field reduces the stopping power in regions of low and high beam density. However, the influence of the magnetic field becomes complicated in regions of moderate beam density. The stopping power increases in a weak magnetic field, but it decreases in a strong magnetic field. At high beam density and moderate magnetic field, two low-density channels of plasma electrons appear on both sides of the incident beam pulse trajectory. This is because electrons near the beam pulses will be attracted and move along with the beam pulses, while other electrons nearby are restricted by the magnetic field and cannot fill the gap.
Authors:
; ; ; ;  [1] ;  [2] ;  [1] ;  [3]
  1. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China and Joint Laboratory of Atomic and Molecular Physics of NWNU and IMPCAS, Northwest Normal University, Lanzhou 730070 (China)
  2. Software Center for High Performance Numerical Simulation, China Academy of Engineering Physics, Beijing 100088 (China)
  3. (China)
Publication Date:
OSTI Identifier:
22493764
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 9; 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 PULSERS; CONES; ELECTRONS; ION BEAMS; MAGNETIC FIELDS; PLASMA; PLASMA SIMULATION; STOPPING POWER; TRAJECTORIES; TWO-DIMENSIONAL CALCULATIONS