| Original Articles |
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Evolution of Wave Energy Deposition Profile in HT-7 Lower Hybrid Current Drive Experiment |
| FANG Yu-De;SHI Yue-Jiang;KUANG Guang-Li;LIU Yue-Xiu;SHEN Wei-Ci;DING Bo-Jiang |
| Institute of Plasma Physics, Chinese Academe of Sciences, P.
O. Box 1126, Hefei 230031
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| Cite this article: |
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FANG Yu-De, SHI Yue-Jiang, KUANG Guang-Li et al 2001 Chin. Phys. Lett. 18 1487-1489 |
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Abstract Lower hybrid waves (LHWs) with a selected n|| spectrum have been used to control the energy deposition profiles, and then the wave driven current profiles effectively in tokamak discharges. In our lower hybrid current drive experiment in HT-7 tokamak, it was found that the setup of the wave energy deposition profile is a graduation process. In the beginning phase of the wave injection duration, the waves (with different n|| spectrum) deposit their energy almost all in the central region of the plasma column, even if their n|| are very different. Up to around one hundred milliseconds, the wave energy deposition profiles just can take their corresponding shapes according to the n|| spectrum of LHWs. It also shown that this evolution process is affected obviously by the LHW driven current profile, which has been formed early.
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| Keywords:
52.55.Fa
52.50.Gj
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Published: 01 November 2001
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| PACS: |
52.55.Fa
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(Tokamaks, spherical tokamaks)
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52.50.Gj
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(Plasma heating by particle beams)
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