Effects of core stochastization on particle and momentum transport

Nuclear Fushion

article

Yoshiaki Ohtani¹  Kenji Tanaka²  Hiroe Igami²  Katsumi Ida²  Yasuhiro Suzuki²  Yuki Takemura²  Hayato Tsuchiya²  Mike Sanders³  Mikirou Yoshinuma²  Tokihiko Tokuzawa²  Ichihiro Yamada²  Ryo Yasuhara²  Hisamichi Funaba²  Mamoru Shoji²  Takahiro Bando¹  LHD Experimental Group² 

[1] Naka Fusion Institute, National Institutes for Quantum and Radiological Science and Technology;National Institute for Fusion Science;Eindhoven University of Technology

关键词: stochastic magnetic field;    particle transport;    momentum transport;    helical device;    modulation experiment;   

DOI  :  10.1088/1741-4326/abd6b1

来源: Institute of Physics Publishing Ltd.

【 摘 要 】

The effects of the stochastic magnetic field in a plasma center produced by electron cyclotron current drive (ECCD) on transport have been revealed. Because the electron temperature profile is flat in the core region, in the case of counter-directed ECCD (ctr-ECCD) against the toroidal magnetic field, the magnetic field is stochastic in the core region with rotational transformᵼ∼ 1/3. The particle diffusion coefficient of the ctr-ECCD plasma is approximately 20 times as large as that of the plasma without the stochastic magnetic field produced by co-directed ECCD (co-ECCD) at the maximum. Furthermore, in the stochastic magnetic field with ctr-ECCD, counter-directed intrinsic rotation is observed in the plasma with balanced NBI discharge.

【 授权许可】

Unknown