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Title: Suppression of cyclotron instability in Electron Cyclotron Resonance ion sources by two-frequency heating

Multiple frequency heating is one of the most effective techniques to improve the performance of Electron Cyclotron Resonance (ECR) ion sources. The method increases the beam current and average charge state of the extracted ions and enhances the temporal stability of the ion beams. It is demonstrated in this paper that the stabilizing effect of two-frequency heating is connected with the suppression of electron cyclotron instability. Experimental data show that the interaction between the secondary microwave radiation and the hot electron component of ECR ion source plasmas plays a crucial role in mitigation of the instabilities.
Authors:
 [1] ;  [2] ; ;  [1] ; ; ; ; ; ;  [3]
  1. Institute of Applied Physics of Russian Academy of Sciences, 46 Ulyanova st., Nizhny Novgorod (Russian Federation)
  2. (UNN), 23 Gagarina st., Nizhny Novgorod (Russian Federation)
  3. Department of Physics, University of Jyväskylä, Jyväskylä (Finland)
Publication Date:
OSTI Identifier:
22490094
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 8; 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 CURRENTS; CHARGE STATES; CYCLOTRON INSTABILITY; ECR ION SOURCES; ELECTRON CYCLOTRON-RESONANCE; EXPERIMENTAL DATA; HEATING; ION BEAMS; MICROWAVE RADIATION; PLASMA