Sensitivity analysis of upstream plasma condition for SST-1 X-Divertor configuration with SOLPS

10th Asia Plasma and Fusion Association Conference

Himabindu, M.^1 ; Tyagi, Anil K.^1 ; Sharma, Deepti^1 ; Sharma, Devendra^1 ; Srinivasan, R.^1

Institute for Plasma Research, Near Indira Bridge, Bhat, Gandhinagar

382428, India^1

关键词: Divertor region;    Down-stream plasmas;    Plasma conditions;    Plasma equilibria;    Plasma neutrals;    Plasma transport;    Scrape-off layer plasmas;    Separatrix density;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/823/1/012026/pdf
DOI  :  10.1088/1742-6596/823/1/012026

来源: IOP

【 摘 要 】

Extensive power exhausts and target heat loads are anticipated in reactor grade fusion devices. Prototyping of an X-Divertor based power exhaust scheme is being attempted by means of simulations of Scrape-off Layer plasma transport in the diverted plasma equilibria of SST-1 tokamak using SOLPS5.1. Evaluation of the relative advantages of an X-Divertor configuration involves simulating the SST-1 standard divertor scheme plasma transport for the reference and then achieving equivalent upstream plasma conditions in the X-divertor equilibrium to ensure equivalent core plasma in both the cases. The first optimization is to be achieved by simulating effects of an external gas puff in the SOL region for controlling separatrix density in the X-divertor configuration with visible modifications in the downstream plasma conditions. The present work analyzes sensitivity of the upstream SOL plasma conditions to the gas puff intensity and its effect on the plasma neutral transport in the divertor region.