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Mass dependency of high-wavenumber turbulence in a linear partially magnetized plasma

We investigated the mass dependency of the high-wavenumber turbulence, which occurs at scales smaller than the ion effective Larmor radius, in a partially magnetized plasma column. In this system, two different types of fluctuations were observed: one exhibiting a coherent discrete spectrum, while t...

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Published in:Physics of plasmas 2024-04, Vol.31 (4)
Main Authors: Kawachi, Yuichi, Sasaki, Makoto, Nishizawa, Takashi, Kosuga, Yusuke, Terasaka, Kenichiro, Inagaki, Shigeru, Yamada, Takuma, Kasuya, Naohiro, Moon, Chanho, Nagashima, Yoshihiko, Fujisawa, Akihide
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container_title Physics of plasmas
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creator Kawachi, Yuichi
Sasaki, Makoto
Nishizawa, Takashi
Kosuga, Yusuke
Terasaka, Kenichiro
Inagaki, Shigeru
Yamada, Takuma
Kasuya, Naohiro
Moon, Chanho
Nagashima, Yoshihiko
Fujisawa, Akihide
description We investigated the mass dependency of the high-wavenumber turbulence, which occurs at scales smaller than the ion effective Larmor radius, in a partially magnetized plasma column. In this system, two different types of fluctuations were observed: one exhibiting a coherent discrete spectrum, while the other displaying a broadband continuous spectrum. The phase velocities of both types showed a similar mass dependency, approximately matching the ion sound velocity or electron diamagnetic drift velocity. Additionally, we found that the discrete spectrum has a peak interval frequency comparable to the ion cyclotron frequency, which is consistent with ion cyclotron ranges of fluctuations, including ion Bernstein waves.
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subjects Acoustic velocity
Bernstein waves
Broadband
Cyclotron frequency
Cyclotrons
Diamagnetism
Larmor radius
Turbulence
Wavelengths
title Mass dependency of high-wavenumber turbulence in a linear partially magnetized plasma
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