Paper | Title | Page |
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TUPH26 | Numerical Assessment of Beam Diagnostic Calorimeter for East Neutral Beam Injector | 162 |
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Funding: This work has been supported by The National Natural Science Foundation of China (NNSFC) (Contract No. 11575240) and the Foundation of ASIPP (Contract No. DSJJ-15-GC03). Neutral beam injection is one of the most effective means of plasma heating and has been also verified to be applicable for current driving. In order to support the physical research of EAST, two neutral beam injectors (NBI, 80 keV, 4 MW) have been developed and constructed in Institute of Plasma Physics, CAS. In order to evaluate beam intensity distribution and divergence, a moveable sophisticated copper short-pulse beam diagnostic calorimeter is designed and installed on the NBI test stand. In this article, the structure of calorimeter, the operating parameters are introduced. The new diagnostic calorimeter plate bombarded by the beam adopts blocking design and there is no heat transfer between adjacent block. Thermocouples are installed into the block, so the temperature can be measured precisely. Based on the data obtained by thermocouples, the beam pattern can be plotted. In order to ensure the diagnostic calorimeter work safely, the operating parameters are explored using FEM. As the new beam diagnostic calorimeter solve the problem of mutual interference due to the heat transfer of each block, it can give more precise beam property comparing with the present calorimeter. |
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DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-SAP2017-TUPH26 | |
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