Pure ion current collection in ion sensitive probe measurement with a metal mesh guard electrode for evaluation of ion temperature in magnetized plasma

Journal Article · Fri Feb 15 00:00:00 EST 2013 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4790175· OSTI ID:22105404

Hsieh, Tung-Yuan; Kawamori, Eiichirou ^[1]; Nishida, Yasushi ^[2]

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1. Institute of Space, Astrophysical and Plasma Sciences, National Cheng Kung University, Taiwan (China)
2. Plasma and Space Science Center, National Cheng Kung University, Taiwan (China)

This paper presents a new design of ion sensitive probe (ISP) that enables collection of pure ion current for accurate measurement of the perpendicular ion temperature in magnetized plasmas. The new type of ISP resolves a longstanding issue widely observed in ISP type measurements, namely, that the current-voltage characteristic is smeared by an unexpected electron current in the standard ISP model. The new ISP is equipped with a fine scale metal mesh on the sensor entrance to prevent electrons from flowing to the sensor, a phenomenon considered to be caused by the space-charge effect. The new ISP successfully measured the ion temperature of electron cyclotron resonance plasmas.

• OSTI ID: 22105404
• Journal Information: Review of Scientific Instruments, Vol. 84, Issue 2; Other Information: (c) 2013 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
DESIGN
ELECTRODES
ELECTRON CYCLOTRON-RESONANCE
ELECTRONS
ION TEMPERATURE
METALS
PLASMA
TEMPERATURE MEASUREMENT