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论文类型：期刊论文

发表时间：2018-11-01

发表刊物：FUSION ENGINEERING AND DESIGN

收录刊物：SCIE、CPCI-S

卷号：136

期号：,SI

页面范围：1041-1046

ISSN号：0920-3796

关键字：Scrape-off layer; Gas puffing; Divertor; Fueling; Simulation

摘要：Plasma fueling by gas puffing on HL-2A tokamak is studied by using the SOLPS code package. The injected molecular D-2 is simulated by the kinetic neutral transport code Eirene and the plasma is modeled by the multi fluid plasma transport code B2.5. By adjusting the radial transport coefficients D-perpendicular to and chi(perpendicular to), the HL-2A experimental upstream plasma is well reproduced, which is taken as the initial state before gas puffing. The plasma and neutral evolution during the gas puffing and its impact on the divertor plasma are studied. It is found that the D-2 can only penetrate into a very shallow region, however, the atomic D produced mainly by the dissociation can enhance the neutral D penetration depth, thus fuels the core plasma. Moreover, the impact of the gas puffing rate on the plasma is presented and discussed.