Divertor detachment and exhaust on the TdeV tokamak
Divertor detachment and exhaust on the TdeV tokamak
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TdeV 托卡马克上的偏滤器拆卸和排气
DOI：
10.1088/0741-3335/38/12a/010
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发表时间：
1996
影响因子：
2.2
通讯作者：
W Zuzak
中科院分区：
文献类型：
--
作者：
R Décostebec;B L Stansfield;J L Gauvreau;G W Pacher;F. Meo;G. Abel;C. Boucher;B C Gregorynergie;Matériaux;J P Gunn;E. Haddad;J.;J. Mailloux;R. Marchand;F. Martin;N. Richard;M M Shoucri;B. Terreault;W Zuzak
实验数据，分析和模拟被用来描述的物理偏滤器分离和分离条件下，在TDeV的He排气。随着密度的增加，等离子体被发现逐渐脱离外侧偏滤器板与显着减少的离子通量的板，电离前沿和目标板之间的压力梯度的产生，和强交叉场运输偏滤器。偏滤器等离子体和板之间的局部相互作用进行了描述，偏滤器板附近的碳溅射和分子过程的证据。通过分离，偏滤器排气和滞留继续增加，尽管偏滤器He富集度保持较低但恒定在约0.2，但He排气不受影响。适当的密度似乎足以有效地降低偏滤器板处的峰值功率负荷，并使He排气通过偏滤器。用B2/EIRENE和DIVIMP程序对边缘和偏滤器等离子体进行了模拟，结果与测量值吻合较好，并指出了可能的偏滤器几何改进
Experimental data, analysis and simulations are used to describe the physics of divertor detachment and He exhaust under detached conditions in TdeV. With increasing density, the plasma is found to detach progressively from the outboard divertor plates with a marked reduction of the ion flux to the plates, the generation of a pressure gradient between an ionization front and the target plate, and strong cross-field transport in the divertor. Local interactions between the divertor plasma and the plates are described, with evidence for carbon sputtering and molecular processes near the divertor plates. Divertor exhaust and retention continue to increase through detachment and He exhaust is not affected although the divertor He enrichment remains low but constant at about 0.2. A moderate density of seems to be sufficient both for efficient peak power load reduction at the divertor plate and good He exhaust through the divertor. Simulations of the edge and divertor plasmas using the B2/EIRENE and DIVIMP codes give reasonable agreement with the measurements and indicate possible divertor geometry improvements