Inference of the microwave absorption coefficient from stray radiation measurements in Wendelstein 7-X

被引：9

作者：

Moseev, D. ^{[1
]}

Laqua, H. P. ^{[1
]}

Marsen, S. ^{[1
]}

Marushchenko, N. ^{[1
]}

Stange, T. ^{[1
]}

Braune, H. ^{[1
]}

Gellert, F. ^{[1
,2
]}

Hirsch, M. ^{[1
]}

Hoefel, U. ^{[1
]}

Knauer, J. ^{[1
]}

Oosterbeek, J. W. ^{[1
,3
]}

Turkin, Y. ^{[1
]}

机构：

[1] Max Planck Inst Plasma Phys, Greifswald, Germany

[2] Ernst Moritz Arndt Univ Greifswald, Greifswald, Germany

[3] Eindhoven Univ Technol, Eindhoven, Netherlands

来源：

NUCLEAR FUSION | 2017年 / 57卷 / 03期

关键词：

Wendelstein; 7-X; O2; absorption; stray radiation; plasma startup; CURRENT DRIVE; POWER; W7-X; ECRH;

D O I：

10.1088/1741-4326/aa4f13

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：

The efficiency of electron cyclotron heating is determined by the microwave absorption of the plasma. Good microwave absorption is also crucial for the machine safety. In this paper we present a method of evaluating the microwave absorption coefficient from stray radiation measurements. The discussed method is computationally simple and can be applied potentially in real time. Evolution of the second harmonic extraordinary mode (X2) microwave absorption coefficient in Wendelstein 7-X during the start-up phase is presented, as well as an estimate of the absorption coefficient for the second harmonic ordinary mode (O2) wave.

引用

页数：7

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