Plasma and Fusion Research

Volume 21, 1201026 (2026)

Rapid Communications

Fluctuations-Based Calibration of Probe Radial Position in Linear Magnetized Plasmas
Donato DI MATTEO1), Takuma YAMADA2,4), Yuto IKEDA1), Yoshihiko NAGASHIMA3,4), Takashi NISHIZAWA3,4), Takamasa OGATA5), Chanho MOON3,4)
1)
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga 816-8580, Japan
2)
Faculty of Arts and Science, Kyushu University, Fukuoka 819-0395, Japan
3)
Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
4)
Research Center for Plasma Turbulence, Kyushu University, Kasuga 816-8580, Japan
5)
Departement of Interdisciplinary Engineering, School of Engineering, Kyushu University, Kasuga 816-8580, Japan
(Received 22 December 2025 / Accepted 4 February 2026 / Published 19 May 2026)

Abstract

To properly study plasma fluctuations and to develop new plasma processing technologies, precise calibration of probes is required. We exploit plasma fluctuations properties to develop a novel simple method for calibrating the radial position of a probe in a linear magnetized plasma device. We determine the probe radial position with respect to the plasma column axis by using a previously calibrated reference probe. This study provides the experimental evidence that plasma fluctuations can be used not only to investigate plasma physics but also to determine the radial position of probes.

Keywords

magnetized plasma, probe, calibration, radial position, high-frequency, fluctuations, coherence

DOI: 10.1585/pfr.21.1201026

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