Time Evolution of the Rotational Transform Profile in Current-Carrying LHD Plasmas

Yuji NAKAMURA; Kiyomasa WATANABE; Yoshiro NARUSHIMA; Katsumi IDA; Mikiro YOSHINUMA; Satoru SAKAKIBARA; Hisamichi FUNABA; Kazuo KAWAHATA; Masayuki YOKOYAMA; Noriyoshi NAKAJIMA; Atsushi FUKUYAMA

doi:10.1585/pfr.3.S1058

Regular Articles

Time Evolution of the Rotational Transform Profile in Current-Carrying LHD Plasmas

Yuji NAKAMURA, Kiyomasa WATANABE, Yoshiro NARUSHIMA, Katsumi IDA, Mikiro YOSHINUMA, Satoru SAKAKIBARA, Hisamichi FUNABA, Kazuo KAWAHATA, Masayuki YOKOYAMA, Noriyoshi NAKAJIMA, Atsushi FUKUYAMA

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Keywords: stellarator/heliotron, Large Helical Device, net plasma current, rotational transform, bootstrap current, Ohkawa current, inductive current

JOURNAL FREE ACCESS

2008 Volume 3 Pages S1058

DOI https://doi.org/10.1585/pfr.3.S1058

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Abstract

Numerical analysis is performed for a low beta neutral beam heated plasma and a superdense core plasma in the Large Helical Device (LHD) to investigate the time evolution of the rotational transform profile, which is calculated consistently with the three-dimensional magnetohydrodynamics equilibrium. Although there is a considerable amount of noninductive current flow, such as the bootstrap and Ohkawa currents, the inductive current component prevents a rapid change of the rotational transform profile in these plasmas.

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