NEUTRAL PARTICLE-TRANSPORT IN A TOKAMAK TOROIDAL BELT PUMP LIMITER

被引：12

作者：

CORBETT, WJ ^{[1
]}

CONN, RW ^{[1
]}

REITER, D ^{[1
]}

DIPPEL, KH ^{[1
]}

FINKEN, KH ^{[1
]}

机构：

[1] FORSCHUNGSZENTRUM JULICH, W-5170 JULICH 1, GERMANY

来源：

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A | 1990年 / 8卷 / 03期

关键词：

D O I：

10.1116/1.576846

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The Advanced Limiter Test-II (ALT-II) is an experimental toroidal belt pump limiter in the TEXTOR tokamak. This configuration is designed to study power and particle removal capabilities of the toroidal limiter during the long pulse (4 s), high power (7 MW) tokamak discharges. Probe measurements of plasma parameters in the limiter shadow are used to calibrate the incident ion flux. Neutral gas pressure and particle throughput to the pumps are measured with Bayard-Alpert gauges. In the ohmic phase, the plasma density in the limiter scoops is 3 to 8X1011 cm −3, electron temperatures are 8 to 12 eV, and the neutral pressure can reach 0.5 mTorr. Numerical calculations show that the background plasma influences atomic and molecular gas transport in the scoops, and the estimated particle removal rates agree with experimental measurements under ohmic (0.1-0.2 Torr l/s) and high flux conditions with neutral beam injection (NBI) (> 1.0 Torr l/s). © 1990, American Vacuum Society. All rights reserved.

引用

页码：1772 / 1777

页数：6

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