COOLING OF EXTRACTION ELECTRODE OF AN ION-SOURCE IN LONG-PULSE OPERATION

被引：6

作者：

HORIIKE, H

KONDOH, U

MORITA, H

SHIRAKATA, H

SUGAWARA, T

TANAKA, S

机构：

[1] Division of Thermonuclear Fusion Research, Japan Atomic Energy Research Institute, Tokai, Ibaraki

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 1979年 / 50卷 / 11期

关键词：

D O I：

10.1063/1.1135738

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Experimental studies were made on the cooling of extraction electrodes of an ion source in the case of long-pulse operation. Copper electrodes with forced water cooling pipes were tested under the condition that an ion beam of 1 to 5 A at 30 keV was extracted for up to 10 s. The average heat loading to the grid are of the electrode was as high as 130 W/cm2. This high heat flux was obtained by a set of electrodes artificially arranged to produce poor beam optics, and hence the high heat loading. Temperature of the ground electrode was measured at two points by thermocouples buried and silver brazed in it, and was kept below 230°C due to a large boiling heat transfer coefficient of the cooling water. No evidences of deformation or deterioration of the electrodes was observed after repetitious beam extraction. This heat loading was still a half of that on the grid of the ion source for the JT-60 NBI.

引用

页码：1453 / 1457

页数：5