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Title: Plasma ignition and steady state simulations of the Linac4 H{sup −} ion source

The RF heating of the plasma in the Linac4 H{sup −} ion source has been simulated using a particle-in-cell Monte Carlo collision method. This model is applied to investigate the plasma formation starting from an initial low electron density of 10{sup 12} m{sup −3} and its stabilization at 10{sup 18} m{sup −3}. The plasma discharge at low electron density is driven by the capacitive coupling with the electric field generated by the antenna, and as the electron density increases the capacitive electric field is shielded by the plasma and induction drives the plasma heating process. Plasma properties such as e{sup −}/ion densities and energies, sheath formation, and shielding effect are presented and provide insight to the plasma properties of the hydrogen plasma.
Authors:
; ;  [1] ; ; ;  [2]
  1. CERN, 1211 Geneva 23 (Switzerland)
  2. Graduate School of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kouhoku-ku, Yokohama 223-8522 (Japan)
Publication Date:
OSTI Identifier:
22253885
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 2; Conference: ICIS 2011: 14. international conference on ion sources, Giardini-Naxos, Sicily (Italy), 12-16 Sep 2011; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ANTENNAS; ELECTRIC FIELDS; ELECTRON DENSITY; ION COLLISIONS; ION DENSITY; ION SOURCES; MONTE CARLO METHOD; PLASMA; PLASMA HEATING; SHIELDING; SIMULATION; STABILIZATION; STEADY-STATE CONDITIONS