Effect of plasma current on magnetohydrodynamic modes in neutral beam heated plasmas in compact helical system

Satoru Sakakibara; Hiroshi Yamada; Kazuo Toi; Akira Ejiri; Akira Ando; Harukazu Lguchi; Keisuke Matsuoka; Shigeru Morita; Osamu Motojima; Kiyohiko Nishimura; Shoichi Okamura; Kenji Tanaka1

doi:10.1143/JJAP.34.L252

Effect of plasma current on magnetohydrodynamic modes in neutral beam heated plasmas in compact helical system

Satoru Sakakibara, Hiroshi Yamada, Kazuo Toi, Akira Ejiri, Akira Ando, Harukazu Lguchi, Keisuke Matsuoka, Shigeru Morita, Osamu Motojima, Kiyohiko Nishimura, Shoichi Okamura, Kenji Tanaka1

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

Effects of the net toroidal plasma currents on magnetohydrodynamic (MHD) modes have been investigated in neutral beam heated plasmas with the control of ohmic current. The characteristics of experimental observations are discussed in comparison with the calculated 3-D equilibria. The resonant modes are destabilized by the change of magnetic configuration due to the induced current in the co-direction. The modes with m/n = 2/l and 3/2 abruptly disappear at the specific current, which is consistent with the disappearance of the resonant surfaces. The behavior of these modes is phenomenologically consistent with that of the interchange mode.

Original language	English
Pages (from-to)	L252-L255
Journal	Japanese journal of applied physics
Volume	34
Issue number	2
DOIs	https://doi.org/10.1143/JJAP.34.L252
Publication status	Published - 1995 Feb
Externally published	Yes

Keywords

CHS
Interchange mode
MHD instability
Magnetic fluctuation
Ohmic heating current

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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10.1143/JJAP.34.L252

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Effect of plasma current on magnetohydrodynamic modes in neutral beam heated plasmas in compact helical system. / Sakakibara, Satoru; Yamada, Hiroshi; Toi, Kazuo; Ejiri, Akira; Ando, Akira; Lguchi, Harukazu; Matsuoka, Keisuke; Morita, Shigeru; Motojima, Osamu; Nishimura, Kiyohiko; Okamura, Shoichi; Tanaka1, Kenji.

In: Japanese journal of applied physics, Vol. 34, No. 2, 02.1995, p. L252-L255.

Research output: Contribution to journal › Article › peer-review

Sakakibara, Satoru ; Yamada, Hiroshi ; Toi, Kazuo ; Ejiri, Akira ; Ando, Akira ; Lguchi, Harukazu ; Matsuoka, Keisuke ; Morita, Shigeru ; Motojima, Osamu ; Nishimura, Kiyohiko ; Okamura, Shoichi ; Tanaka1, Kenji. / Effect of plasma current on magnetohydrodynamic modes in neutral beam heated plasmas in compact helical system. In: Japanese journal of applied physics. 1995 ; Vol. 34, No. 2. pp. L252-L255.

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abstract = "Effects of the net toroidal plasma currents on magnetohydrodynamic (MHD) modes have been investigated in neutral beam heated plasmas with the control of ohmic current. The characteristics of experimental observations are discussed in comparison with the calculated 3-D equilibria. The resonant modes are destabilized by the change of magnetic configuration due to the induced current in the co-direction. The modes with m/n = 2/l and 3/2 abruptly disappear at the specific current, which is consistent with the disappearance of the resonant surfaces. The behavior of these modes is phenomenologically consistent with that of the interchange mode.",

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AU - Sakakibara, Satoru

AU - Yamada, Hiroshi

AU - Toi, Kazuo

AU - Ejiri, Akira

AU - Ando, Akira

AU - Lguchi, Harukazu

AU - Matsuoka, Keisuke

AU - Morita, Shigeru

AU - Motojima, Osamu

AU - Nishimura, Kiyohiko

AU - Okamura, Shoichi

AU - Tanaka1, Kenji

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AB - Effects of the net toroidal plasma currents on magnetohydrodynamic (MHD) modes have been investigated in neutral beam heated plasmas with the control of ohmic current. The characteristics of experimental observations are discussed in comparison with the calculated 3-D equilibria. The resonant modes are destabilized by the change of magnetic configuration due to the induced current in the co-direction. The modes with m/n = 2/l and 3/2 abruptly disappear at the specific current, which is consistent with the disappearance of the resonant surfaces. The behavior of these modes is phenomenologically consistent with that of the interchange mode.

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KW - MHD instability

KW - Magnetic fluctuation

KW - Ohmic heating current

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