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Title: Effect of subdominant species on the evolution of intense primary beam in a low energy beam transport line

The dynamics of space-charge-dominated multispecies beam with different distributions has been studied in a solenoid based low energy beam transport line using a particle-in-cell simulation method. Results are presented in wide parameter regimes covering emittance dominated as well as space charge dominated multispecies beams consisting of p, H{sub 2}{sup +}, and H{sub 3}{sup +} beams. Simulation shows the formation of hollow distribution of H{sub 2}{sup +} and H{sub 3}{sup +} beams around the desired proton beam and separation is more distinct as the fraction of proton is increased. The hollow formation is almost independent of combination of H{sub 2}{sup +} and H{sub 3}{sup +} beams, once the fraction of proton beam is fixed. The emittance growth of proton is found to increase sharply in the space-charge-dominated regime and is more in the cases where proton fraction is low.
Authors:
; ;  [1]
  1. Variable Energy Cyclotron Centre, 1/AF, Bidhannagar, Kolkata-700064 (India)
Publication Date:
OSTI Identifier:
22220668
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 8; Other Information: (c) 2013 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 TRANSPORT; BEAM-PLASMA SYSTEMS; DISTRIBUTION; HYDROGEN; HYDROGEN IONS 2 PLUS; HYDROGEN IONS 3 PLUS; PLASMA; PLASMA SIMULATION; PROTON BEAMS; PROTONS; SOLENOIDS; SPACE CHARGE