Calculation of the Heat Flux on the First Wall During Disruption on Tokamak

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• 作者：Zhendong Yang ; Shuangbao Shu ; Kaifu Gan ; Jianan Fang ; Bin Zhang
• 关键词：Infrared camera ; Tokamak ; Plasma disruption ; Heat flux
• 刊名：Journal of Fusion Energy
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：36
• 期：1
• 页码：15-20
• 全文大小：
• 刊物类别：Engineering
• 刊物主题：Nuclear Fusion; Atoms and Molecules in Strong Fields, Laser Matter Interaction; Nuclear Energy; Sustainable Development; Energy Economics; Renewable and Green Energy;
• 出版者：Springer US
• ISSN：1572-9591
• 卷排序：36

文摘

Disruptions are the most dangerous instabilities in tokamak plasma. During plasma disruption, the large amounts of energy will be deposited on Plasma Facing Components (PFCs) which is a damaging threat for the divertor target and the first wall materials. Therefore, studying the characteristic of heat deposition on the first wall is very significant. The Infrared (IR) camera is an effective tool to measure the surface temperature profile on the first wall on the Experimental Advanced Superconducting Tokamak (EAST). With a finite difference method, the heat flux arrived to the divertor can be calculated from the surface temperature. However, the surface layer on the divertor has a great influence on the calculation of the heat flux on the divertor. The numerical method for solving heat conduction for semi-infinite model is given in this paper. And the thermal resistance of surface layers is considered in this numerical method. In addition, the distribution of heat flux on the divertor during disruption is also shown.