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Title: ECR-Driven Multicusp Volume H- Ion Source

Abstract

We studied the negative ion current extracted from the plasma created by seven elementary ECR sources, operating at 2.45 GHz, placed in the magnetic multipole chamber 'Camembert III'. We varied the pressure from 1 to 4 mTorr, with a maximum power of 1 kW and studied the plasma created in this system by measuring the various plasma parameters, including the density and temperature of the negative hydrogen ions. We found that the electron temperature is optimal for negative hydrogen ion production at 9.5 cm from the ECR sources. The tantalum-covered wall surface pollution reduces the extracted negative ion current and enhances the electron current. Tantalum evaporation has a positive effect. The use of a grid and of a collar in front of the plasma electrode did not lead to any enhancement of the extracted negative ion current.

Authors:
; ; ; ; ;  [1]
  1. Laboratoire LPTP, Ecole Polytechnique, UMR 7648 du CNRS, 91128 Palaiseau (France)
Publication Date:
OSTI Identifier:
20630803
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 763; Journal Issue: 1; Conference: 10. international symposium on production and neutralization of negative ions and beams, Kiev (Ukraine), 14-17 Sep 2004; Other Information: DOI: 10.1063/1.1908296; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; 43 PARTICLE ACCELERATORS; ANIONS; ELECTRIC CURRENTS; ELECTRON CYCLOTRON-RESONANCE; ELECTRON TEMPERATURE; ELECTRONS; GHZ RANGE; HYDROGEN IONS; ION DENSITY; ION SOURCES; ION TEMPERATURE; PLASMA; PLASMA DIAGNOSTICS; RF SYSTEMS; TANTALUM

Citation Formats

Bacal, M, Ivanov, Jr, A A, Rouille, C, Svarnas, P, Bechu, S, Pelletier, J, and Laboratoire EPM, ENSHMG, BP 95, 38402 Saint Martin d'Heres Cedex. ECR-Driven Multicusp Volume H- Ion Source. United States: N. p., 2005. Web. doi:10.1063/1.1908296.
Bacal, M, Ivanov, Jr, A A, Rouille, C, Svarnas, P, Bechu, S, Pelletier, J, & Laboratoire EPM, ENSHMG, BP 95, 38402 Saint Martin d'Heres Cedex. ECR-Driven Multicusp Volume H- Ion Source. United States. https://doi.org/10.1063/1.1908296
Bacal, M, Ivanov, Jr, A A, Rouille, C, Svarnas, P, Bechu, S, Pelletier, J, and Laboratoire EPM, ENSHMG, BP 95, 38402 Saint Martin d'Heres Cedex. 2005. "ECR-Driven Multicusp Volume H- Ion Source". United States. https://doi.org/10.1063/1.1908296.
@article{osti_20630803,
title = {ECR-Driven Multicusp Volume H- Ion Source},
author = {Bacal, M and Ivanov, Jr, A A and Rouille, C and Svarnas, P and Bechu, S and Pelletier, J and Laboratoire EPM, ENSHMG, BP 95, 38402 Saint Martin d'Heres Cedex},
abstractNote = {We studied the negative ion current extracted from the plasma created by seven elementary ECR sources, operating at 2.45 GHz, placed in the magnetic multipole chamber 'Camembert III'. We varied the pressure from 1 to 4 mTorr, with a maximum power of 1 kW and studied the plasma created in this system by measuring the various plasma parameters, including the density and temperature of the negative hydrogen ions. We found that the electron temperature is optimal for negative hydrogen ion production at 9.5 cm from the ECR sources. The tantalum-covered wall surface pollution reduces the extracted negative ion current and enhances the electron current. Tantalum evaporation has a positive effect. The use of a grid and of a collar in front of the plasma electrode did not lead to any enhancement of the extracted negative ion current.},
doi = {10.1063/1.1908296},
url = {https://www.osti.gov/biblio/20630803}, journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 763,
place = {United States},
year = {Wed Apr 06 00:00:00 EDT 2005},
month = {Wed Apr 06 00:00:00 EDT 2005}
}