| Original Articles |
|
|
|
|
Ohmic Radio-Frequency Synergy Current Drive and Transformer Recharging Experiments in the HT-7 Tokamak |
| CHEN Zhong-Yong;WAN Bao-Nian;SHI Yue-Jiang; HU Li-Qun;XU Han-Dong |
| Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031 |
|
| Cite this article: |
|
CHEN Zhong-Yong, WAN Bao-Nian, SHI Yue-Jiang et al 2005 Chin. Phys. Lett. 22 1721-1724 |
|
|
|
Abstract Lower hybrid current drive (LHCD) experiments for investigating the interaction between lower hybrid (LH) wave and residual dc electric field were performed in extensive plasma parameter ranges in the HT-7 superconducting tokamak. The experimental results are well fitted to the Karney--Fisch theory on the efficiency of LH waves energy converted to poloidal magnetic field energy. The fraction of absorbed LH power is about 0.75 for the HT-7 machine, and the upshift of the LH-wave parallel refraction index during LHCD experiments have been derived by the optimizing fitting parameters. The LH wave is also used for the transformer recharging when the plasma current is maintained unchanged. The highest efficiency about 7% has been achieved in HT-7 machine.
|
| Keywords:
52.55.Fa
52.35.Hr
52.50.Sw
52.50.Nr
|
|
|
Published: 01 July 2005
|
|
| PACS: |
52.55.Fa
|
(Tokamaks, spherical tokamaks)
|
| |
52.35.Hr
|
(Electromagnetic waves (e.g., electron-cyclotron, Whistler, Bernstein, upper hybrid, lower hybrid))
|
| |
52.50.Sw
|
(Plasma heating by microwaves; ECR, LH, collisional heating)
|
| |
52.50.Nr
|
(Plasma heating by DC fields; ohmic heating, arcs)
|
|
|
|
|
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
