Study of transition mechanism based on poloidal ion viscosity using biasing electrode in heliotron J

H. Takahashi, S. Kitajima, K. Ishii, Y. Sato, J. Tachibana, S. Koike, T. Oku, M. Yokoyama, Y. Suzuki, S. Satake, S. Yamamoto, S. Ohshima, H. Okada, K. Nagasaki, S. Kobayashi, T. Minami, T. Mizuuchi, F. Sano

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

An improved confinement could be successfully achieved by an electrode biasing in the Heliotron J. The increases of ne and n eTe, the decrease of the potential fluctuation and the formation of strong negative Er were observed. The nonlinearity in the plasma resistance was found in the transition region and the clear hysteresis was observed. An intermittent transition phenomenon was found in the marginal-biasing condition. In the discharge, forward and backward transition repetitively occurred. This is considered due to the spontaneous change of the normalized poloidal torque around the transition threshold.

Original languageEnglish
Title of host publication40th EPS Conference on Plasma Physics, EPS 2013
PublisherEuropean Physical Society (EPS)
Pages794-797
Number of pages4
ISBN (Print)9781632663108
Publication statusPublished - 2013 Jan 1
Event40th EPS Conference on Plasma Physics, EPS 2013 - Espoo, Finland
Duration: 2013 Jul 12013 Jul 5

Publication series

Name40th EPS Conference on Plasma Physics, EPS 2013
Volume1

Other

Other40th EPS Conference on Plasma Physics, EPS 2013
CountryFinland
CityEspoo
Period13/7/113/7/5

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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