Two dimensional density fluctuation measurements during the non-inductive current ramp-up phase in the compact plasma wall interaction experimental device CPD

H. Zushi, T. Ryoukai, K. Kikukawa, T. Morisaki, R. Bhattacharyay, T. Yoshinaga, Kazuaki Hanada, T. Sakimura, Hiroshi Idei, K. Dono, N. Nishino, H. Honma, S. Tashima, T. Mutoh, S. Kubo, K. Nagasaki, M. Sakamoto, Y. Nakashima, Y. Higashizono, K. N. Sato & 5 others Kazuo Nakamura, Makoto Hasegawa, S. Kawasaki, H. Nakashima, A. Higashijima

Research output: Contribution to journalArticle

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Abstract

Two-dimensional structure of density fluctuations is examined during the current jump phase, indicating a change from the open magnetic fields to the closed ones. During the smooth current ramp-up phase the two-dimensional contour of the LiI intensity shows vertically alignment, consistent with the magnetic surfaces. At the inflection point in Ip ramp-up the LiI intensity contour becomes flat in the observation regime and then suddenly a steep gradient and higher intensity regime are formed in the vertical direction. This higher intensity corresponds to a burst of LiI waveform. According to these changes in the contour, it is found that, within 1 ms around the burst of LiI, a low frequency coherent wave with a long wavelength rapidly grows. The relations with other signals (magnetic flux and microwave stray power) are discussed with respect to the topological change in the magnetic configuration and mode conversion of the incident electromagnetic waves.

Original languageEnglish
Pages (from-to)397-401
Number of pages5
JournalPlasma Science and Technology
Volume11
Issue number4
DOIs
Publication statusPublished - Dec 11 2009

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ramps
bursts
interactions
inflection points
magnetic flux
electromagnetic radiation
waveforms
alignment
low frequencies
microwaves
gradients
configurations
magnetic fields
wavelengths

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

Two dimensional density fluctuation measurements during the non-inductive current ramp-up phase in the compact plasma wall interaction experimental device CPD. / Zushi, H.; Ryoukai, T.; Kikukawa, K.; Morisaki, T.; Bhattacharyay, R.; Yoshinaga, T.; Hanada, Kazuaki; Sakimura, T.; Idei, Hiroshi; Dono, K.; Nishino, N.; Honma, H.; Tashima, S.; Mutoh, T.; Kubo, S.; Nagasaki, K.; Sakamoto, M.; Nakashima, Y.; Higashizono, Y.; Sato, K. N.; Nakamura, Kazuo; Hasegawa, Makoto; Kawasaki, S.; Nakashima, H.; Higashijima, A.

In: Plasma Science and Technology, Vol. 11, No. 4, 11.12.2009, p. 397-401.

Research output: Contribution to journalArticle

Zushi, H, Ryoukai, T, Kikukawa, K, Morisaki, T, Bhattacharyay, R, Yoshinaga, T, Hanada, K, Sakimura, T, Idei, H, Dono, K, Nishino, N, Honma, H, Tashima, S, Mutoh, T, Kubo, S, Nagasaki, K, Sakamoto, M, Nakashima, Y, Higashizono, Y, Sato, KN, Nakamura, K, Hasegawa, M, Kawasaki, S, Nakashima, H & Higashijima, A 2009, 'Two dimensional density fluctuation measurements during the non-inductive current ramp-up phase in the compact plasma wall interaction experimental device CPD', Plasma Science and Technology, vol. 11, no. 4, pp. 397-401. https://doi.org/10.1088/1009-0630/11/4/06
Zushi, H. ; Ryoukai, T. ; Kikukawa, K. ; Morisaki, T. ; Bhattacharyay, R. ; Yoshinaga, T. ; Hanada, Kazuaki ; Sakimura, T. ; Idei, Hiroshi ; Dono, K. ; Nishino, N. ; Honma, H. ; Tashima, S. ; Mutoh, T. ; Kubo, S. ; Nagasaki, K. ; Sakamoto, M. ; Nakashima, Y. ; Higashizono, Y. ; Sato, K. N. ; Nakamura, Kazuo ; Hasegawa, Makoto ; Kawasaki, S. ; Nakashima, H. ; Higashijima, A. / Two dimensional density fluctuation measurements during the non-inductive current ramp-up phase in the compact plasma wall interaction experimental device CPD. In: Plasma Science and Technology. 2009 ; Vol. 11, No. 4. pp. 397-401.
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AU - Morisaki, T.

AU - Bhattacharyay, R.

AU - Yoshinaga, T.

AU - Hanada, Kazuaki

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AU - Dono, K.

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AU - Tashima, S.

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AU - Sakamoto, M.

AU - Nakashima, Y.

AU - Higashizono, Y.

AU - Sato, K. N.

AU - Nakamura, Kazuo

AU - Hasegawa, Makoto

AU - Kawasaki, S.

AU - Nakashima, H.

AU - Higashijima, A.

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