Local island divertor experiments on CHS

A. Komori; N. Ohyabu; S. Masuzaki; T. Morisaki; H. Suzuki; C. Takahashi; S. Sakakibara; K. Watanabe; T. Watanabe; T. Minami; S. Morita; K. Tanaka; S. Ohdachi; S. Kubo; N. Inoue; H. Yamada; K. Nishimura; S. Okamura; K. Matsuoka; O. Motojima; M. Fujiwara; A. Iiyoshi; C. C. Klepper; J. F. Lyon; A. C. England; D. E. Greenwood; D. K. Lee; D. R. Overbey; J. A. Rome; D. E. Schechter; C. T. Wilson

doi:10.1016/s0022-3115(97)80175-4

Local island divertor experiments on CHS

A. Komori, N. Ohyabu, S. Masuzaki, T. Morisaki, H. Suzuki, C. Takahashi, S. Sakakibara, K. Watanabe, T. Watanabe, T. Minami, S. Morita, K. Tanaka, S. Ohdachi, S. Kubo, N. Inoue, H. Yamada, K. Nishimura, S. Okamura, K. Matsuoka, O. MotojimaM. Fujiwara, A. Iiyoshi, C. C. Klepper, J. F. Lyon, A. C. England, D. E. Greenwood, D. K. Lee, D. R. Overbey, J. A. Rome, D. E. Schechter, C. T. Wilson

Diagnostics and Control

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Abstract

A local island divertor (LID) was installed on the Compact Helical System (CHS) to demonstrate the principle of LID and to study its effects on the edge plasma. The particle flow was observed to be guided to the back side of the externally created magnetic island along field lines, and pumped out by a cryogenic pump with high pumping efficiency. As a result, a factor of about 2 reduction in the average core density was seen compared with non-LID discharges at the same gas puff rate. In addition to the demonstration of these fundamental divertor functions, we observed a modest improvement of energy confinement, which could be due to the edge plasma control by the local island divertor.

Original language	English
Pages (from-to)	967-971
Number of pages	5
Journal	Journal of Nuclear Materials
Volume	241-243
DOIs	https://doi.org/10.1016/s0022-3115(97)80175-4
State	Published - Feb 11 1997

Keywords

Active pumping
CHS
Divertor plasma
Improved confinement mode
Island divertor

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10.1016/s0022-3115(97)80175-4

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Komori, A., Ohyabu, N., Masuzaki, S., Morisaki, T., Suzuki, H., Takahashi, C., Sakakibara, S., Watanabe, K., Watanabe, T., Minami, T., Morita, S., Tanaka, K., Ohdachi, S., Kubo, S., Inoue, N., Yamada, H., Nishimura, K., Okamura, S., Matsuoka, K., ... Wilson, C. T. (1997). Local island divertor experiments on CHS. Journal of Nuclear Materials, 241-243, 967-971. https://doi.org/10.1016/s0022-3115(97)80175-4

@article{317ffd9c01574ab8817d98ff25b8d407,

title = "Local island divertor experiments on CHS",

abstract = "A local island divertor (LID) was installed on the Compact Helical System (CHS) to demonstrate the principle of LID and to study its effects on the edge plasma. The particle flow was observed to be guided to the back side of the externally created magnetic island along field lines, and pumped out by a cryogenic pump with high pumping efficiency. As a result, a factor of about 2 reduction in the average core density was seen compared with non-LID discharges at the same gas puff rate. In addition to the demonstration of these fundamental divertor functions, we observed a modest improvement of energy confinement, which could be due to the edge plasma control by the local island divertor.",

keywords = "Active pumping, CHS, Divertor plasma, Improved confinement mode, Island divertor",

author = "A. Komori and N. Ohyabu and S. Masuzaki and T. Morisaki and H. Suzuki and C. Takahashi and S. Sakakibara and K. Watanabe and T. Watanabe and T. Minami and S. Morita and K. Tanaka and S. Ohdachi and S. Kubo and N. Inoue and H. Yamada and K. Nishimura and S. Okamura and K. Matsuoka and O. Motojima and M. Fujiwara and A. Iiyoshi and Klepper, \{C. C.\} and Lyon, \{J. F.\} and England, \{A. C.\} and Greenwood, \{D. E.\} and Lee, \{D. K.\} and Overbey, \{D. R.\} and Rome, \{J. A.\} and Schechter, \{D. E.\} and Wilson, \{C. T.\}",

year = "1997",

month = feb,

day = "11",

doi = "10.1016/s0022-3115(97)80175-4",

language = "English",

volume = "241-243",

pages = "967--971",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier",

}

Komori, A, Ohyabu, N, Masuzaki, S, Morisaki, T, Suzuki, H, Takahashi, C, Sakakibara, S, Watanabe, K, Watanabe, T, Minami, T, Morita, S, Tanaka, K, Ohdachi, S, Kubo, S, Inoue, N, Yamada, H, Nishimura, K, Okamura, S, Matsuoka, K, Motojima, O, Fujiwara, M, Iiyoshi, A, Klepper, CC, Lyon, JF, England, AC, Greenwood, DE, Lee, DK, Overbey, DR, Rome, JA, Schechter, DE & Wilson, CT 1997, 'Local island divertor experiments on CHS', Journal of Nuclear Materials, vol. 241-243, pp. 967-971. https://doi.org/10.1016/s0022-3115(97)80175-4

TY - JOUR

T1 - Local island divertor experiments on CHS

AU - Komori, A.

AU - Ohyabu, N.

AU - Masuzaki, S.

AU - Morisaki, T.

AU - Suzuki, H.

AU - Takahashi, C.

AU - Sakakibara, S.

AU - Watanabe, K.

AU - Watanabe, T.

AU - Minami, T.

AU - Morita, S.

AU - Tanaka, K.

AU - Ohdachi, S.

AU - Kubo, S.

AU - Inoue, N.

AU - Yamada, H.

AU - Nishimura, K.

AU - Okamura, S.

AU - Matsuoka, K.

AU - Motojima, O.

AU - Fujiwara, M.

AU - Iiyoshi, A.

AU - Klepper, C. C.

AU - Lyon, J. F.

AU - England, A. C.

AU - Greenwood, D. E.

AU - Lee, D. K.

AU - Overbey, D. R.

AU - Rome, J. A.

AU - Schechter, D. E.

AU - Wilson, C. T.

PY - 1997/2/11

Y1 - 1997/2/11

N2 - A local island divertor (LID) was installed on the Compact Helical System (CHS) to demonstrate the principle of LID and to study its effects on the edge plasma. The particle flow was observed to be guided to the back side of the externally created magnetic island along field lines, and pumped out by a cryogenic pump with high pumping efficiency. As a result, a factor of about 2 reduction in the average core density was seen compared with non-LID discharges at the same gas puff rate. In addition to the demonstration of these fundamental divertor functions, we observed a modest improvement of energy confinement, which could be due to the edge plasma control by the local island divertor.

AB - A local island divertor (LID) was installed on the Compact Helical System (CHS) to demonstrate the principle of LID and to study its effects on the edge plasma. The particle flow was observed to be guided to the back side of the externally created magnetic island along field lines, and pumped out by a cryogenic pump with high pumping efficiency. As a result, a factor of about 2 reduction in the average core density was seen compared with non-LID discharges at the same gas puff rate. In addition to the demonstration of these fundamental divertor functions, we observed a modest improvement of energy confinement, which could be due to the edge plasma control by the local island divertor.

KW - Active pumping

KW - CHS

KW - Divertor plasma

KW - Improved confinement mode

KW - Island divertor

UR - https://www.scopus.com/pages/publications/85087582705

U2 - 10.1016/s0022-3115(97)80175-4

DO - 10.1016/s0022-3115(97)80175-4

M3 - Article

AN - SCOPUS:85087582705

SN - 0022-3115

VL - 241-243

SP - 967

EP - 971

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

ER -

Local island divertor experiments on CHS

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Keywords

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