Properties of internal transport barrier formation in JT-60U

Sakamoto, Yoshiteru; Suzuki, Takahiro; Ide, Shunsuke; Koide, Yoshihiko; Takenaga, Hidenobu; Kamada, Yutaka; Fujita, Takaaki; Fukuda, Takeshi; Takizuka, Tomonori; Shirai, Hiroshi; et al.

Nuclear Fusion, 44(8), p.876 - 882, 2004/08

https://doi.org/10.1088/0029-5515/44/8/006

Response of the ion thermal diffusivity to the radial electric field Er shear has been investigated in JT-60U and the following results were found. (1) In the case of positive magnetic shear (PS) plasma, the ion thermal diffusivity in the core region shows L mode state, weak internal transport barrier (ITB), and strong ITB depending upon the heating power. In the case of reversed magnetic shear (RS) plasma, however, no power degradation of the ion thermal diffusivity is observed. (2) In the case of weak ITB, the ion thermal diffusivity decreases gradually with increasing the Er shear for both PS and RS plasmas. There exists a threshold of an effective Er shear to change its state from weak to strong ITBs. (3) The threshold of the effective Er shear in the case of RS plasma is small compared with that in the case of PS plasma.

Dynamic behavior of transport in normal and reversed shear plasmas with internal barriers in JT-60U

Neudatchin, S. V.; Takizuka, Tomonori; Shirai, Hiroshi; Fujita, Takaaki; Isayama, Akihiko; Kamada, Yutaka; Koide, Yoshihiko; Dnestrovskij, Y. N.*

JAERI-Research 2001-056, 32 Pages, 2001/12

JAERI-Research-2001-056.pdf:1.31MB

no abstracts in English

Test of canonical profiles and semi-empirical transport models with JT-60U plasmas

Dnestrovskij, Y. N.*; Lysenko, S. E.*; Tarasyan, N. T.*; Polevoi, A. R.*; Takizuka, Tomonori; Shirai, Hiroshi; Kikuchi, Mitsuru

Nuclear Fusion, 39(11Y), p.2089 - 2093, 1999/00

https://doi.org/10.1088/0029-5515/39/11Y/358

no abstracts in English