[Table of Contents]

Plasma and Fusion Research

Volume 2, S1099 (2007)

Regular Articles

Electron Loss Cross Sections for a Heavy Ion Beam Probe
M. NISHIURA, T. IDO, A. SHIMIZU, R. K. JANEV1), T. KATO, V. P. SHEVELKO2), S. KATO, K. TSUKADA, M. YOKOTA, H. OGAWA, T. INOUE, H. NAKANO, Y. HAMADA and LHD Experimental Group
National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi, Toki, Gifu, 509-5292 Japan
1)
Macedonian Academy of Sciences and Arts, P.O. Box 428, 1000 Skopje, Macedonia
2)
P.N. Lebedev Physical Institute, Leninskii prospect 53, 119991 Moscow, Russia
(Received 6 December 2006 / Accepted 10 May 2007 / Published 20 November 2007)

Abstract

Electron loss cross sections of Au+ and Au2+ by electron and proton impact are calculated by using respectively the Lotz formula and the LOSS and CAPTURE computer codes. The corresponding rate coefficients have also been calculated. Using this information, the signal levels of heavy ion beam probe in the Large Helical Device are estimated. The calculated beam currents at the detector position are compared with the detected beam currents in the MeV energy range for a plasma electron density of 1 × 1019 m-3 and electron temperature of 1.5 keV. The obtained cross section / rate coefficient data can also be used for reconstruction of electron density and temperature profiles.

Keywords

heavy ion beam probe, plasma potential, electric field, electron loss cross section, gold

DOI: 10.1585/pfr.2.S1099

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References

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This paper may be cited as follows:

M. NISHIURA, T. IDO, A. SHIMIZU, R. K. JANEV, T. KATO, V. P. SHEVELKO, S. KATO, K. TSUKADA, M. YOKOTA, H. OGAWA, T. INOUE, H. NAKANO, Y. HAMADA and LHD Experimental Group, Plasma Fusion Res. 2, S1099 (2007).