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Analysis of Energy Deposition on Ion Source Components of EAST Neutral Beam Injector

Xiang Li, Yongjian Xu, Chundong Hu, Ling Yu, Yu Chen, NBI Group

Fusion Science and Technology / Volume 70 / Number 3 / November 2016 / Pages 429-434

Technical Paper / dx.doi.org/10.13182/FST15-251

First Online Publication:August 25, 2016
Updated:November 2, 2016

Neutral beam injection is one of the main auxiliary heating methods in controllable nuclear fusion experiments. During the operation of the EAST neutral beam injector, a large amount of energy is deposited on the ion source components, especially the electron dump (ED). In this paper, the energy deposited on the ion source components was analyzed in arc discharge mode and beam extraction mode indirectly by calculating the energy taken away by the cooling water. The results show that the ED has a large heat load: the average power density is almost 4.5 MW/m2 when the beam power is 3.3 MW. This research may lay the foundation for increasing the heat transfer capacity and guide the optimization of the ion source components in future work.

 
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