Experimental studies and modeling of complete H-mode divertor detachment in ASDEX Upgrade

被引：74

作者：

Reimold, F. ^{[1
]}

Wischmeier, M. ^{[1
]}

Bernert, M. ^{[1
]}

Potzel, S. ^{[1
]}

Coster, D. ^{[1
]}

Bonnin, X. ^{[3
]}

Reiter, D. ^{[2
]}

Meisl, G. ^{[1
]}

Kallenbach, A. ^{[1
]}

Aho-Mantila, L. ^{[4
]}

Stroth, U. ^{[1
]}

机构：

[1] Max Planck Inst Plasma Phys, D-85748 Garching, Germany

[2] Forschungszentrum Julich, Inst Energie & Klimaforsch Plasmaphys, D-52425 Julich, Germany

[3] Univ Paris 13, CNRS LSPM, Sorbonne Paris Cite, F-93430 Villetaneuse, France

[4] VTT, FI-02044 Espoo, Finland

来源：

JOURNAL OF NUCLEAR MATERIALS | 2015年 / 463卷

关键词：

PLASMA EDGE; PHYSICS;

D O I：

10.1016/j.jnucmat.2014.12.019

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Power exhaust in future fusion devices is critical and operation with a detached divertor is foreseen for ITER and DEMO. The evolution of detachment in nitrogen seeded H-mode discharges at ASDEX Upgrade is categorized in four phases. Complete detachment of the outer target is found to be correlated with a strongly localized radiation at the X-point and a pressure loss at the pedestal top at almost constant core plasma pressure. SOLPS modeling shows that enhanced radial transport in the divertor region is necessary to reconcile the experimental profiles with the simulations. The modeling supports the experimental observation of the correlation of complete detachment with an X-point radiation and a reduction of the pedestal top pressure. A remaining discrepancy are significantly lower neutral densities in the divertor compared to experiment. The effects of wall pumping, the particle reflection model and the boundary conditions on the plasma solution are discussed. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：128 / 134

页数：7

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