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Two-dimensional potential profile and density measurements by use of an improved gold neutral beam probe

Authors :
Akiyosi Itakura
Teruji Cho
Kojima Atsushi
K. Hagisawa
Yoshiaki Miyata
Takahide Yamaguchi
Kameo Ishii
Y. Masuda
Y. Takemura
Source :
Review of Scientific Instruments. 75:3649-3651
Publication Year :
2004
Publisher :
AIP Publishing, 2004.

Abstract

An improved gold neutral beam probe system has been developed in order to measure both the potential profile and the electron density profile simultaneously at the central cell of the tandem mirror GAMMA10. A gold film detector was also developed in order to measure the plasma density profile. The yield curves of secondary electrons were measured as a function of the incident angle and electron energy using both the gold neutral beam and ultraviolet ray injection. Time evolution of the plasma line density was measured by adjusting the incident angle and adding a beam chopping method. The result is in good agreement in comparison with the line density measured using a microwave interferometer. It was found that this film detector is very useful for simultaneous measurements of the electrostatic potential and plasma density.

Details

ISSN :
10897623 and 00346748
Volume :
75
Database :
OpenAIRE
Journal :
Review of Scientific Instruments
Accession number :
edsair.doi...........137e54fa81f939d5f7f94afae60d8171
Full Text :
https://doi.org/10.1063/1.1788862