論文

査読有り
2017年5月

Characteristics of electron internal transport barrier in Heliotron J

PLASMA PHYSICS AND CONTROLLED FUSION
  • N. Kenmochi
  • ,
  • T. Minami
  • ,
  • C. Takahashi
  • ,
  • S. Mochizuki
  • ,
  • K. Nishioka
  • ,
  • S. Kobayashi
  • ,
  • K. Nagasaki
  • ,
  • Y. Nakamura
  • ,
  • H. Okada
  • ,
  • S. Kado
  • ,
  • S. Yamamoto
  • ,
  • S. Ohshima
  • ,
  • S. Konoshima
  • ,
  • G. M. Weir
  • ,
  • Y. Otani
  • ,
  • T. Mizuuchi

59
5
開始ページ
055013
終了ページ
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1088/1361-6587/aa63cf
出版者・発行元
IOP PUBLISHING LTD

The formation of an electron internal transport barrier (eITB) has been observed for the first time with centrally focused electron cyclotron heating (ECH) microwaves injected into plasma in Heliotron J. When the heating power per electron density (P-ECH/(n) over bar (e)) exceeds a threshold of 250 x 10(-19) kW m(3), transient increases of both the central T-e and the core T-e gradients are observed. A neoclassical (NC) calculation using the Sugama-Nishimura moment method predicts that the large positive radial electric field (E-r) is formed in the core region. Heat transport analysis shows a significant reduction of the effective electron thermal diffusivity in the plasma with the eITB related to that without the eITB. The large gap between the experimentally obtained effective thermal diffusivity and the NC thermal diffusivity suggests that the suppression of anomalous transport contributes to the core improved confinement of the eITB plasma. The electron cyclotron emission measurement shows both the transient increase and the hysteresis phenomena during the eITB formation.

Web of Science ® 被引用回数 : 8

リンク情報
DOI
https://doi.org/10.1088/1361-6587/aa63cf
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000397908900001&DestApp=WOS_CPL
ID情報
  • DOI : 10.1088/1361-6587/aa63cf
  • ISSN : 0741-3335
  • eISSN : 1361-6587
  • Web of Science ID : WOS:000397908900001

エクスポート
BibTeX RIS