Speaker
Dr
Shinsuke OHSHIMA
(Kyoto University)
Description
The hydrogen/deuterium (H/D) isotope effects on fluctuations and its configuration dependence are studied in a helical device, Heliotron J. The isotope dependence of a toroidally symmetric fluctuation in low frequency range of <~4kHz,, which is considered as a zonal flow, is observed in low-density ECH plasmas in Heliotron J. The long-range toroidal correlation of the low frequency range become higher on D dominant plasmas in standard configuration of Heliotron J. Interestingly, however, different dependence on isotope ratios, smaller amplitude and coherence in the frequency range, is observed in D plasmas in the magnetic configuration with low-bumpiness. The configuration dependence can be one of factors to explain the difference in isotope effect between tokamaks and helical devices.
| Country or International Organization | Japan |
|---|---|
| Paper Number | EX/P3-3 |
Primary author
Dr
Shinsuke OHSHIMA
(Kyoto University)
Co-authors
Dr
Hiroyuki Okada
(Institute of Advanced Energy, Kyoto University)
Prof.
Kazunobu Nagasaki
(Institute of Advanced Energy, Kyoto University)
Dr
Linge Zang
(Southwestern Institute of Physics)
Dr
Satoshi Yamamoto
(Institute of Advanced Energy, Kyoto University)
Dr
Shinichiro KADO
(Institute of Advanced Energy, Kyoto University)
Dr
Shinji Kobayashi
(IAE, Kyoto Univ.)
Dr
Takashi Minami
(Institute of Advanced Energy, Kyoto University)
Dr
Tohru MIZUUCHI
(Institute of Advanced Energy, Kyoto University)
