Abstract An H$\alpha$ emission measurement array with 25 detection channels has been built on HL-1M tokamak. Reconstruction maps of H$\alpha$ emission distribution in plasma cross-section have been obtained by using tomography, with a hydrogen pellet injected into the plasma. The dimension, the shape and the rotation characteristic of the cross-section of the pellet ablation material flow tube have been observed. These results have been analysed and explained tentatively by using the `tail' model and the linear expansion model.
Received: 02 July 2005
Revised: 22 October 2005
Accepted manuscript online:
(Plasma diagnostic techniques and instrumentation)
Cite this article:
Dong Jia-Fu(董贾福), Wang Shi-Qing(王世庆), and Li Wen-Zhong(郦文忠) Observation of hydrogen pellet ablation material flow by tomography 2006 Chinese Physics 15 2368
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