Electrode biasing experiment in the Large Helical Device

S. Kitajima; H. Takahashi; K. Ishii; J. Sato; T. Ambo; M. Kanno; A. Okamoto; M. Sasao; S. Inagaki; M. Takayama; S. Masuzaki; M. Shoji; N. Ashikawa; M. Tokitani; M. Yokoyama; Y. Suzuki; T. Shimozuma; T. Ido; A. Shimizu; Y. Nagayama; T. Tokuzawa; K. Nishimura; T. Morisaki; S. Kubo; H. Kasahara; T. Mutoh; H. Yamada; Y. Tatematsu

doi:10.1088/0029-5515/51/8/083029

Electrode biasing experiment in the Large Helical Device

S. Kitajima, H. Takahashi, K. Ishii, J. Sato, T. Ambo, M. Kanno, A. Okamoto, M. Sasao, S. Inagaki, M. Takayama, S. Masuzaki, M. Shoji, N. Ashikawa, M. Tokitani, M. Yokoyama, Y. Suzuki, T. Shimozuma, T. Ido, A. Shimizu, Y. NagayamaT. Tokuzawa, K. Nishimura, T. Morisaki, S. Kubo, H. Kasahara, T. Mutoh, H. Yamada, Y. Tatematsu

SCI - Chemistry

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

6 Citations (Scopus)

Abstract

The transition to the improved confinement mode by electrode biasing was observed for the first time in the Large Helical Device (LHD). A negative resistance was observed in the confinement mode sustained by the cold electrode biasing. The electrode current showed a clear decrease against an increase in the electrode voltage and was characterized by a hysteresis in the transition phenomena. The decrease in the electrode current suggested an improvement in the radial particle transport. An increase in the energy confinement time and remarkable suppression of density fluctuations, which correspond to the transition, were also observed. These results indicated that the electrode biased plasma in LHD showed similar improvements in confinement to those in the H-mode plasmas in tokamaks and stellarators.

Original language	English
Article number	083029
Journal	Nuclear Fusion
Volume	51
Issue number	8
DOIs	https://doi.org/10.1088/0029-5515/51/8/083029
Publication status	Published - 2011 Aug

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Kitajima, S., Takahashi, H., Ishii, K., Sato, J., Ambo, T., Kanno, M., Okamoto, A., Sasao, M., Inagaki, S., Takayama, M., Masuzaki, S., Shoji, M., Ashikawa, N., Tokitani, M., Yokoyama, M., Suzuki, Y., Shimozuma, T., Ido, T., Shimizu, A., ... Tatematsu, Y. (2011). Electrode biasing experiment in the Large Helical Device. Nuclear Fusion, 51(8), Article 083029. https://doi.org/10.1088/0029-5515/51/8/083029

@article{b179ea47e64a46b9ad34d6d80ff6b979,

title = "Electrode biasing experiment in the Large Helical Device",

abstract = "The transition to the improved confinement mode by electrode biasing was observed for the first time in the Large Helical Device (LHD). A negative resistance was observed in the confinement mode sustained by the cold electrode biasing. The electrode current showed a clear decrease against an increase in the electrode voltage and was characterized by a hysteresis in the transition phenomena. The decrease in the electrode current suggested an improvement in the radial particle transport. An increase in the energy confinement time and remarkable suppression of density fluctuations, which correspond to the transition, were also observed. These results indicated that the electrode biased plasma in LHD showed similar improvements in confinement to those in the H-mode plasmas in tokamaks and stellarators.",

author = "S. Kitajima and H. Takahashi and K. Ishii and J. Sato and T. Ambo and M. Kanno and A. Okamoto and M. Sasao and S. Inagaki and M. Takayama and S. Masuzaki and M. Shoji and N. Ashikawa and M. Tokitani and M. Yokoyama and Y. Suzuki and T. Shimozuma and T. Ido and A. Shimizu and Y. Nagayama and T. Tokuzawa and K. Nishimura and T. Morisaki and S. Kubo and H. Kasahara and T. Mutoh and H. Yamada and Y. Tatematsu",

year = "2011",

month = aug,

doi = "10.1088/0029-5515/51/8/083029",

language = "English",

volume = "51",

journal = "Nuclear Fusion",

issn = "0029-5515",

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Kitajima, S, Takahashi, H, Ishii, K, Sato, J, Ambo, T, Kanno, M, Okamoto, A, Sasao, M, Inagaki, S, Takayama, M, Masuzaki, S, Shoji, M, Ashikawa, N, Tokitani, M, Yokoyama, M, Suzuki, Y, Shimozuma, T, Ido, T, Shimizu, A, Nagayama, Y, Tokuzawa, T, Nishimura, K, Morisaki, T, Kubo, S, Kasahara, H, Mutoh, T, Yamada, H & Tatematsu, Y 2011, 'Electrode biasing experiment in the Large Helical Device', Nuclear Fusion, vol. 51, no. 8, 083029. https://doi.org/10.1088/0029-5515/51/8/083029

TY - JOUR

T1 - Electrode biasing experiment in the Large Helical Device

AU - Kitajima, S.

AU - Takahashi, H.

AU - Ishii, K.

AU - Sato, J.

AU - Ambo, T.

AU - Kanno, M.

AU - Okamoto, A.

AU - Sasao, M.

AU - Inagaki, S.

AU - Takayama, M.

AU - Masuzaki, S.

AU - Shoji, M.

AU - Ashikawa, N.

AU - Tokitani, M.

AU - Yokoyama, M.

AU - Suzuki, Y.

AU - Shimozuma, T.

AU - Ido, T.

AU - Shimizu, A.

AU - Nagayama, Y.

AU - Tokuzawa, T.

AU - Nishimura, K.

AU - Morisaki, T.

AU - Kubo, S.

AU - Kasahara, H.

AU - Mutoh, T.

AU - Yamada, H.

AU - Tatematsu, Y.

PY - 2011/8

Y1 - 2011/8

N2 - The transition to the improved confinement mode by electrode biasing was observed for the first time in the Large Helical Device (LHD). A negative resistance was observed in the confinement mode sustained by the cold electrode biasing. The electrode current showed a clear decrease against an increase in the electrode voltage and was characterized by a hysteresis in the transition phenomena. The decrease in the electrode current suggested an improvement in the radial particle transport. An increase in the energy confinement time and remarkable suppression of density fluctuations, which correspond to the transition, were also observed. These results indicated that the electrode biased plasma in LHD showed similar improvements in confinement to those in the H-mode plasmas in tokamaks and stellarators.

AB - The transition to the improved confinement mode by electrode biasing was observed for the first time in the Large Helical Device (LHD). A negative resistance was observed in the confinement mode sustained by the cold electrode biasing. The electrode current showed a clear decrease against an increase in the electrode voltage and was characterized by a hysteresis in the transition phenomena. The decrease in the electrode current suggested an improvement in the radial particle transport. An increase in the energy confinement time and remarkable suppression of density fluctuations, which correspond to the transition, were also observed. These results indicated that the electrode biased plasma in LHD showed similar improvements in confinement to those in the H-mode plasmas in tokamaks and stellarators.

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DO - 10.1088/0029-5515/51/8/083029

M3 - Article

AN - SCOPUS:80051650295

SN - 0029-5515

VL - 51

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 8

M1 - 083029

ER -

Electrode biasing experiment in the Large Helical Device

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