Investigation of inter-ELM pedestal profiles in ASDEX Upgrade

被引：23
|
作者：
Wolfrum, E. [1 ]
Burckhart, A. [1 ]
Fischer, R. [1 ]
Hicks, N. [1 ]
Konz, C. [1 ]
Kurzan, B. [1 ]
Langer, B. [1 ]
Puetterich, T. [1 ]
Zohm, H. [1 ]
机构：
[1] Max Planck Inst Plasma Phys, EURATOM Assoc, D-85748 Garching, Germany
来源：
PLASMA PHYSICS AND CONTROLLED FUSION | 2009年 / 51卷 / 12期
关键词：
H-MODE PEDESTAL; DIII-D; PHYSICS;
D O I：
10.1088/0741-3335/51/12/124057
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：
Integrated data analysis and equilibrium reconstruction on a millisecond time base are used to gain edge profiles with high spatial and temporal resolution. The measured radial electric field profiles for a series of discharges with different gas fuelling levels show their minimum at the position of maximal ratio of pressure gradient and density (del p/n). The analysis of electron density and temperature profiles in between edge localized modes (ELMs) reveals a characteristic sequence of phases, starting with a fast recovery phase, a quiet pressure build-up phase and a strongly fluctuating phase before the next ELM breaks out. These phases are described in terms of profile development, the behaviour of maximal gradients as well as their positions.
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页数：9
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