Edge transport and its interconnection with main chamber recycling in ASDEX Upgrade

被引：48

作者：

Kallenbach, A ^{[1
]}

Dux, R ^{[1
]}

Gafert, J ^{[1
]}

Haas, G ^{[1
]}

Horton, LD ^{[1
]}

Jakobi, M ^{[1
]}

Kurzan, B ^{[1
]}

Müller, HW ^{[1
]}

Neu, R ^{[1
]}

Neuhauser, J ^{[1
]}

Pugno, R ^{[1
]}

Pütterich, T ^{[1
]}

Rohde, V ^{[1
]}

Sandmann, W ^{[1
]}

Yoon, SW ^{[1
]}

机构：

[1] EURATOM, Max Planck Inst Plasmaphys, D-85748 Garching, Germany

来源：

NUCLEAR FUSION | 2003年 / 43卷 / 07期

关键词：

D O I：

10.1088/0029-5515/43/7/310

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：

Edge profiles of electron temperature and density are measured in ASDEX Upgrade with a high spatial resolution of 2-3 mm with Thomson scattering. In the region of the edge transport barrier in ELMy H-mode, the gradient lengths of T-e and n(e) are found closely coupled, with the temperature decay length two times shorter than the density decay length corresponding to eta(e) approximate to 2. The eta(e) constraint allows us to calculate the electron temperature and density profiles from the pressure profile if the density and temperature values are known at one spatial position. The edge density in the region of the barrier foot is closely coupled to the main chamber recycling, with no strong dependence on other parameters. In contrast, the density rise from the outer barrier foot to the pedestal exhibits pronounced dependence on plasma current and shaping, indicating quite different mechanisms determining the absolute density and its gradient.

引用

页码：573 / 578

页数：6

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