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Title: Gas breakdown in electron cyclotron resonance ion sources

Abstract

The realization of the beta-beam project (http://beta-beam.web.cern.ch/beta-beam/) assumes the formation of a pulsed ion beam of helium and neon radioactive isotopes. A pulsed electron cyclotron resonance (ECR) source of multicharged ions has been proposed to produce such a beam [P. Sortais et al., Rev. Sci. Instrum. 75, 1610 (2004)]. The rising of plasma density up to a stationary level must be fast enough to actualize this approach. This condition is mandatory to avoid particle losses in the transmission line. In the presented work, the rising time of the plasma density in an ECR ion source from a background level up to 98% of a stationary level is calculated. A zero-dimensional model of plasma formation in a mirror trap [V. Semenov et al., Rev. Sci. Instrum. 73, 635 (2002)] is used, able to make calculation for a wide range of microwave frequencies. Plasma confinement regime can either be classic (Pastoukhov [Rev. Plasma Phys. 13, 203 (1987)]) or gas dynamic, depending on the plasma parameters. The calculations are in good agreement with the experimental results obtained at the SMIS'37 setup. Numerical calculations also show that particle losses can be significantly reduced by pumping effect; thanks to microwave frequency increase above 40 GHz.

Authors:
; ; ; ; ; ;  [1];  [2]
  1. Institute of Applied Physics of Russian Academy of Sciences, Nizhny Novgorod 603950 (Russian Federation)
  2. (France)
Publication Date:
OSTI Identifier:
20778965
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 77; Journal Issue: 3; Conference: 11. international conference on ion sources, Caen (France), 12-16 Sep 2005; Other Information: DOI: 10.1063/1.2166671; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ECR ION SOURCES; ELECTRON CYCLOTRON-RESONANCE; GHZ RANGE 01-100; HELIUM; HIGH-FREQUENCY DISCHARGES; MAGNETIC MIRRORS; MULTICHARGED IONS; NEON; PARTICLE LOSSES; PLASMA; PLASMA CONFINEMENT; PLASMA DENSITY; RADIOACTIVE ION BEAMS; RADIOISOTOPES

Citation Formats

Skalyga, V.A., Zorin, V.G., Izotov, I.V., Sidorov, A.V., Lamy, T., Sortais, P., Thuillier, T., and Laboratoire de Physique Subatomique et de Cosmologie UJF-IN2P3-CNRS, 53 Avenida Des Martyrs, 38026 Grenoble Cedex. Gas breakdown in electron cyclotron resonance ion sources. United States: N. p., 2006. Web. doi:10.1063/1.2166671.
Skalyga, V.A., Zorin, V.G., Izotov, I.V., Sidorov, A.V., Lamy, T., Sortais, P., Thuillier, T., & Laboratoire de Physique Subatomique et de Cosmologie UJF-IN2P3-CNRS, 53 Avenida Des Martyrs, 38026 Grenoble Cedex. Gas breakdown in electron cyclotron resonance ion sources. United States. doi:10.1063/1.2166671.
Skalyga, V.A., Zorin, V.G., Izotov, I.V., Sidorov, A.V., Lamy, T., Sortais, P., Thuillier, T., and Laboratoire de Physique Subatomique et de Cosmologie UJF-IN2P3-CNRS, 53 Avenida Des Martyrs, 38026 Grenoble Cedex. Wed . "Gas breakdown in electron cyclotron resonance ion sources". United States. doi:10.1063/1.2166671.
@article{osti_20778965,
title = {Gas breakdown in electron cyclotron resonance ion sources},
author = {Skalyga, V.A. and Zorin, V.G. and Izotov, I.V. and Sidorov, A.V. and Lamy, T. and Sortais, P. and Thuillier, T. and Laboratoire de Physique Subatomique et de Cosmologie UJF-IN2P3-CNRS, 53 Avenida Des Martyrs, 38026 Grenoble Cedex},
abstractNote = {The realization of the beta-beam project (http://beta-beam.web.cern.ch/beta-beam/) assumes the formation of a pulsed ion beam of helium and neon radioactive isotopes. A pulsed electron cyclotron resonance (ECR) source of multicharged ions has been proposed to produce such a beam [P. Sortais et al., Rev. Sci. Instrum. 75, 1610 (2004)]. The rising of plasma density up to a stationary level must be fast enough to actualize this approach. This condition is mandatory to avoid particle losses in the transmission line. In the presented work, the rising time of the plasma density in an ECR ion source from a background level up to 98% of a stationary level is calculated. A zero-dimensional model of plasma formation in a mirror trap [V. Semenov et al., Rev. Sci. Instrum. 73, 635 (2002)] is used, able to make calculation for a wide range of microwave frequencies. Plasma confinement regime can either be classic (Pastoukhov [Rev. Plasma Phys. 13, 203 (1987)]) or gas dynamic, depending on the plasma parameters. The calculations are in good agreement with the experimental results obtained at the SMIS'37 setup. Numerical calculations also show that particle losses can be significantly reduced by pumping effect; thanks to microwave frequency increase above 40 GHz.},
doi = {10.1063/1.2166671},
journal = {Review of Scientific Instruments},
number = 3,
volume = 77,
place = {United States},
year = {Wed Mar 15 00:00:00 EST 2006},
month = {Wed Mar 15 00:00:00 EST 2006}
}