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Chinese Physics, 2006, Vol. 15(10): 2368-2373    DOI: 10.1088/1009-1963/15/10/030
PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES Prev   Next  

Observation of hydrogen pellet ablation material flow by tomography

Dong Jia-Fu(董贾福), Wang Shi-Qing(王世庆), and Li Wen-Zhong(郦文忠)
College of Engineering and Technical, Chengdu University of Technology, Leshan 614007, China
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.
Keywords:  hydrogen pellet      H$\alpha$ emission      ablation rate      tomography  
Received:  02 July 2005      Revised:  22 October 2005      Accepted manuscript online: 
PACS:  52.38.Mf (Laser ablation)  
  52.30.Gz (Gyrokinetics)  
  52.55.Fa (Tokamaks, spherical tokamaks)  
  52.70.-m (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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