Diagnostics of the cesium amount in an RF negative ion source and the correlation with the extracted current density

被引：34

作者：

Fantz, U ^{[1
]}

Falter, HD ^{[1
]}

Franzen, P ^{[1
]}

Bandyopadhyay, A ^{[1
]}

Heinemann, B ^{[1
]}

Kraus, W ^{[1
]}

McNeely, P ^{[1
]}

Riedl, R ^{[1
]}

Speth, E ^{[1
]}

Tanga, A ^{[1
]}

Wilhelm, R ^{[1
]}

机构：

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

来源：

FUSION ENGINEERING AND DESIGN | 2005年 / 74卷 / 1-4期

关键词：

cesium; current density; RF discharge;

D O I：

10.1016/j.fusengdes.2005.06.184

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 [核科学与技术]; 082701 [核能科学与工程];

摘要：

The formation of negative ions in plasma sources by the surface process requires covering the extraction grid with a material of low work function. This can be achieved by cesium evaporation but for operational reasons the consumption of cesium should be minimised. In order to quantify the amount of cesium in the RF discharge optical emission spectroscopy is used as diagnostic tool. Suitable diagnostic lines and their analysis to obtain particle densities and particle fluxes are described. Influences of argon admixtures to hydrogen and deuterium discharges on cesium emission are shown. A correlation of the cesium emission with the extracted negative ion current density is discussed. (c) 2005 Published by Elsevier B.V.

引用

页码：299 / 303

页数：5

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