Transition phenomena observed during edge electron cyclotron heating in the Heliotron-E helical device

K. Nagasaki; H. Zushi; T. Mizuuchi; K. Kondo; F. Sano; S. Besshou; H. Okada; M. Iima; S. Kobayashi; K. Sakamoto; T. Obiki; Y. Kurimoto; H. Takada; T. Nakayama; M. Sato; T. Bigelow; M. Murakami; J. Lyon

doi:10.1016/0920-3796(94)00181-6

Transition phenomena observed during edge electron cyclotron heating in the Heliotron-E helical device

K. Nagasaki, H. Zushi, T. Mizuuchi, K. Kondo, F. Sano, S. Besshou, H. Okada, M. Iima, S. Kobayashi, K. Sakamoto, T. Obiki, Y. Kurimoto, H. Takada, T. Nakayama, M. Sato, T. Bigelow, M. Murakami, J. Lyon

Fusion Technology

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3 Scopus citations

Abstract

An edge electron cyclotron heating (ECH) experiment has been performed on the Heliotron-E helical device using 35 GHz and 53 GHz gyrotrons. Transition phenomena have been observed during the 53 GHz edge ECH. The Hα emission and the outflux to the wall dropped, and then the core electron density increased by 20%-60%. The electron stored energy seems to be improved up to 20% after the transition. This phenomenon is found to depend strongly on the edge heating power, the target plasma density and the limiter position. A possible mechanism is discussed in terms of high energy electrons produced by the edge ECH.

Original language	English
Pages (from-to)	159-165
Number of pages	7
Journal	Fusion Engineering and Design
Volume	26
Issue number	1-4
DOIs	https://doi.org/10.1016/0920-3796(94)00181-6
State	Published - Jan 1 1995

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Nagasaki, K., Zushi, H., Mizuuchi, T., Kondo, K., Sano, F., Besshou, S., Okada, H., Iima, M., Kobayashi, S., Sakamoto, K., Obiki, T., Kurimoto, Y., Takada, H., Nakayama, T., Sato, M., Bigelow, T., Murakami, M., & Lyon, J. (1995). Transition phenomena observed during edge electron cyclotron heating in the Heliotron-E helical device. Fusion Engineering and Design, 26(1-4), 159-165. https://doi.org/10.1016/0920-3796(94)00181-6

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title = "Transition phenomena observed during edge electron cyclotron heating in the Heliotron-E helical device",

abstract = "An edge electron cyclotron heating (ECH) experiment has been performed on the Heliotron-E helical device using 35 GHz and 53 GHz gyrotrons. Transition phenomena have been observed during the 53 GHz edge ECH. The Hα emission and the outflux to the wall dropped, and then the core electron density increased by 20%-60%. The electron stored energy seems to be improved up to 20% after the transition. This phenomenon is found to depend strongly on the edge heating power, the target plasma density and the limiter position. A possible mechanism is discussed in terms of high energy electrons produced by the edge ECH.",

author = "K. Nagasaki and H. Zushi and T. Mizuuchi and K. Kondo and F. Sano and S. Besshou and H. Okada and M. Iima and S. Kobayashi and K. Sakamoto and T. Obiki and Y. Kurimoto and H. Takada and T. Nakayama and M. Sato and T. Bigelow and M. Murakami and J. Lyon",

year = "1995",

month = jan,

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doi = "10.1016/0920-3796(94)00181-6",

language = "English",

volume = "26",

pages = "159--165",

journal = "Fusion Engineering and Design",

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Nagasaki, K, Zushi, H, Mizuuchi, T, Kondo, K, Sano, F, Besshou, S, Okada, H, Iima, M, Kobayashi, S, Sakamoto, K, Obiki, T, Kurimoto, Y, Takada, H, Nakayama, T, Sato, M, Bigelow, T, Murakami, M & Lyon, J 1995, 'Transition phenomena observed during edge electron cyclotron heating in the Heliotron-E helical device', Fusion Engineering and Design, vol. 26, no. 1-4, pp. 159-165. https://doi.org/10.1016/0920-3796(94)00181-6

TY - JOUR

T1 - Transition phenomena observed during edge electron cyclotron heating in the Heliotron-E helical device

AU - Nagasaki, K.

AU - Zushi, H.

AU - Mizuuchi, T.

AU - Kondo, K.

AU - Sano, F.

AU - Besshou, S.

AU - Okada, H.

AU - Iima, M.

AU - Kobayashi, S.

AU - Sakamoto, K.

AU - Obiki, T.

AU - Kurimoto, Y.

AU - Takada, H.

AU - Nakayama, T.

AU - Sato, M.

AU - Bigelow, T.

AU - Murakami, M.

AU - Lyon, J.

PY - 1995/1/1

Y1 - 1995/1/1

N2 - An edge electron cyclotron heating (ECH) experiment has been performed on the Heliotron-E helical device using 35 GHz and 53 GHz gyrotrons. Transition phenomena have been observed during the 53 GHz edge ECH. The Hα emission and the outflux to the wall dropped, and then the core electron density increased by 20%-60%. The electron stored energy seems to be improved up to 20% after the transition. This phenomenon is found to depend strongly on the edge heating power, the target plasma density and the limiter position. A possible mechanism is discussed in terms of high energy electrons produced by the edge ECH.

AB - An edge electron cyclotron heating (ECH) experiment has been performed on the Heliotron-E helical device using 35 GHz and 53 GHz gyrotrons. Transition phenomena have been observed during the 53 GHz edge ECH. The Hα emission and the outflux to the wall dropped, and then the core electron density increased by 20%-60%. The electron stored energy seems to be improved up to 20% after the transition. This phenomenon is found to depend strongly on the edge heating power, the target plasma density and the limiter position. A possible mechanism is discussed in terms of high energy electrons produced by the edge ECH.

UR - http://www.scopus.com/inward/record.url?scp=0029205911&partnerID=8YFLogxK

U2 - 10.1016/0920-3796(94)00181-6

DO - 10.1016/0920-3796(94)00181-6

M3 - Article

AN - SCOPUS:0029205911

SN - 0920-3796

VL - 26

SP - 159

EP - 165

JO - Fusion Engineering and Design

JF - Fusion Engineering and Design

IS - 1-4

ER -

Transition phenomena observed during edge electron cyclotron heating in the Heliotron-E helical device

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