Volume recombination in divertor I of ASDEX Upgrade

被引：42
|
作者：
Wenzel, U [1 ]
Behringer, K
Carlson, A
Gafert, J
Napiontek, B
Thoma, A
机构：
[1] Max Planck Inst Plasmaphys, EURATOM Assoc, Berlin, Germany
[2] Max Planck Inst Plasmaphys, EURATOM Assoc, Garching, Germany
来源：
NUCLEAR FUSION | 1999年 / 39卷 / 07期
关键词：
D O I：
10.1088/0029-5515/39/7/304
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
High density operation in the ASDEX Upgrade divertor I with horizontal target plates is reported. Density rampup experiments were carried out to characterize detached plasma conditions in the divertor. During the detached phases, hydrogen continue and spectral line emission from high-n shells were observed in the divertor due to the volume recombination. The spectroscopic measurements provide a consistent picture of the evolution of the divertor plasma parameters during the density ramp. By means of the ADAS atomic physics program package, the rate of volume recombination was evaluated, including the effect of opacity. The relative importance of volume recombination in comparison with the target plasma sink is discussed. Observations indicating differences in Volume recombination between the two divertor legs are presented, and the connection of volume recombination to divertor detachment is addressed.
引用
收藏
页码：873 / 882
页数：10
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