Discovery of electric pulsation in a toroidal helical plasma

A. Fujisawa, H. Iguchi, H. Idei, S. Kubo, K. Matsuoka, S. Okamura, K. Tanaka, T. Minami, S. Ohdachi, S. Morita, H. Zushi, S. Lee, M. Osakabe, R. Akiyama, Y. Yoshimura, K. Toi, H. Sanuki, K. Itoh, A. Shimizu, S. TakagiA. Ejiri, C. Takahashi, M. Kojima, S. Hidekuma, K. Ida, S. Nishimura, M. Isobe, N. Inoue, R. Sakamoto, S. I. Itoh, Y. Hamada, M. Fujiwara

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Abstract

A pulsating behavior of the electrostatic potential has been discovered in a low-density, high-electron-temperature plasma of the CHS heliotron/torsatron. The potential profiles were observed to swing repeatedly between two distinctive states in a constant external magnetic field under a continuous supply of particles and energy. The change of the potential profile, which occurs on a much faster time scale (microseconds) than the diffusive time scale (milliseconds), is accompanied by changes in density and temperature. This discovery clearly demonstrates that even in a low beta regime a toroidal helical plasma can produce a self-sustaining dynamic steady state, like the sawtooth oscillation in tokamaks.

Original languageEnglish
Pages (from-to)2256-2259
Number of pages4
JournalPhysical Review Letters
Volume81
Issue number11
DOIs
Publication statusPublished - Sep 14 1998

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sustaining
profiles
electron energy
electrostatics
oscillations
magnetic fields
temperature
energy

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Fujisawa, A., Iguchi, H., Idei, H., Kubo, S., Matsuoka, K., Okamura, S., ... Fujiwara, M. (1998). Discovery of electric pulsation in a toroidal helical plasma. Physical Review Letters, 81(11), 2256-2259. https://doi.org/10.1103/PhysRevLett.81.2256

Discovery of electric pulsation in a toroidal helical plasma. / Fujisawa, A.; Iguchi, H.; Idei, H.; Kubo, S.; Matsuoka, K.; Okamura, S.; Tanaka, K.; Minami, T.; Ohdachi, S.; Morita, S.; Zushi, H.; Lee, S.; Osakabe, M.; Akiyama, R.; Yoshimura, Y.; Toi, K.; Sanuki, H.; Itoh, K.; Shimizu, A.; Takagi, S.; Ejiri, A.; Takahashi, C.; Kojima, M.; Hidekuma, S.; Ida, K.; Nishimura, S.; Isobe, M.; Inoue, N.; Sakamoto, R.; Itoh, S. I.; Hamada, Y.; Fujiwara, M.

In: Physical Review Letters, Vol. 81, No. 11, 14.09.1998, p. 2256-2259.

Research output: Contribution to journalArticle

Fujisawa, A, Iguchi, H, Idei, H, Kubo, S, Matsuoka, K, Okamura, S, Tanaka, K, Minami, T, Ohdachi, S, Morita, S, Zushi, H, Lee, S, Osakabe, M, Akiyama, R, Yoshimura, Y, Toi, K, Sanuki, H, Itoh, K, Shimizu, A, Takagi, S, Ejiri, A, Takahashi, C, Kojima, M, Hidekuma, S, Ida, K, Nishimura, S, Isobe, M, Inoue, N, Sakamoto, R, Itoh, SI, Hamada, Y & Fujiwara, M 1998, 'Discovery of electric pulsation in a toroidal helical plasma', Physical Review Letters, vol. 81, no. 11, pp. 2256-2259. https://doi.org/10.1103/PhysRevLett.81.2256
Fujisawa, A. ; Iguchi, H. ; Idei, H. ; Kubo, S. ; Matsuoka, K. ; Okamura, S. ; Tanaka, K. ; Minami, T. ; Ohdachi, S. ; Morita, S. ; Zushi, H. ; Lee, S. ; Osakabe, M. ; Akiyama, R. ; Yoshimura, Y. ; Toi, K. ; Sanuki, H. ; Itoh, K. ; Shimizu, A. ; Takagi, S. ; Ejiri, A. ; Takahashi, C. ; Kojima, M. ; Hidekuma, S. ; Ida, K. ; Nishimura, S. ; Isobe, M. ; Inoue, N. ; Sakamoto, R. ; Itoh, S. I. ; Hamada, Y. ; Fujiwara, M. / Discovery of electric pulsation in a toroidal helical plasma. In: Physical Review Letters. 1998 ; Vol. 81, No. 11. pp. 2256-2259.
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AU - Iguchi, H.

AU - Idei, H.

AU - Kubo, S.

AU - Matsuoka, K.

AU - Okamura, S.

AU - Tanaka, K.

AU - Minami, T.

AU - Ohdachi, S.

AU - Morita, S.

AU - Zushi, H.

AU - Lee, S.

AU - Osakabe, M.

AU - Akiyama, R.

AU - Yoshimura, Y.

AU - Toi, K.

AU - Sanuki, H.

AU - Itoh, K.

AU - Shimizu, A.

AU - Takagi, S.

AU - Ejiri, A.

AU - Takahashi, C.

AU - Kojima, M.

AU - Hidekuma, S.

AU - Ida, K.

AU - Nishimura, S.

AU - Isobe, M.

AU - Inoue, N.

AU - Sakamoto, R.

AU - Itoh, S. I.

AU - Hamada, Y.

AU - Fujiwara, M.

PY - 1998/9/14

Y1 - 1998/9/14

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