Plasma and Fusion Research

Volume 17, 1201053 (2022)

Rapid Communications

Wave Number Dependence on Ion Mass Number of Resistive Drift Wave Instabilities
Naohiro KASUYA and Makoto SASAKI1)
Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
1)
College of Industrial Technology, Nihon University, Narashino, Chiba 275-8575, Japan
(Received 14 February 2022 / Accepted 24 March 2022 / Published 13 May 2022)

Abstract

Ion mass dependence of the resistive drift wave instability is investigated to understand wave number spectra in magnetized cylindrical plasmas. Modes with larger axial mode numbers are linearly unstable in the case of smaller mass ions as helium. Analytical expression is obtained, which shows that not only the azimuthal mode number but also the axial mode number has the preferable one depending on the mass number. Therefore, 3-D observation of the spatial structure is important to capture the variation including this parameter.

Keywords

resistive drift wave instability, ion mass dependence, wave number spectrum, linear device

DOI: 10.1585/pfr.17.1201053

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