关键词: 偏滤器运行模式, 中性化靶板, 嵌入式平面探针组

Abstract:

In the HL-2A divertor experiments, the profiles of the electron temperature, density and floating potential on divertor plates are measured with the flush probe arrays fixed on the four divertor neutralization plates at the same toroidal cross-section in the HL-2A tokamak. The edge electron temperature during divertor configuration is higher than that during limiter one. Temperature asymmetry between the outer target plate and the inner one is compared. The result of magnetic surface reconstructed from signals of the 18 Mirnov coils is presented. Neutral gas pressure in the divertor chamber measured with fast ionization gauge during divertor discharge is given. The divertor experiment results indicate that the recycle of edge particles is reduced and the level of impurity flux is decreased in the main vacuum chamber.

Key words: Divertor running model, Neutralizer target plates, Flush plane probe array