阴极有半圆柱形凹槽的非对称磁控管型H~-离子源的试验研究

AN EXPERIMENTAL STUDY ON ASYMMETRIC MAGNETRON H~- SOURCE WITH GROOVED CATHODE

摘要: <正> 一、前言国内唯一的一台标准磁控管型H~-离子源已在1983年完成了桌上试验研究,达到了预期的指标。试验中发现,该源按弧功率估算应能引出更多的H~-束流(>50mA),H~-束流的引出除受该装置引出电压(<18kV)的限制外,阴极表面利用系数低也限制了H~-束流的引出,为提高源的效率,引用了阴极-阳极引出狭缝形状聚焦技术,试制了一个带半圆
- 非对称磁控管型H~-离子源 ,
- 凹槽形阴极 ,
- 形状聚焦 ,
- 阴极表面利用系数
Abstract: An asymmetric magnetron H~- source with grooved cathode is built toreplace a standard-magnetron H~- source. This new cathode has a semi-cylindrical groove and its height is reduced so that the cathode-anode spacing in the back of the source increased from 1 mmto 3.6 mm. This leads to an improvement by a factor of three to four inreducing arc power, which depend on the utilization factor of the cathode area.In addition, arc starting was easier than the standard magnetron H~--source. Less influence of the arc current fluctuation and the deviation from thegrooved cathode-anode extracting slit are observed. Also, it is showed gas efficiencyis improved in our source. A new discharge arc chamber and the experimental results on the desk test ofthis device are reported in detail.
- Asymmetric magnetron H~- source ,
- ,
- Grooved cathode ,

[1]	Zhang H. S. et al., A surface-plasma H~-Ion Source. The second China-Japan Joint Symposium on Accelerators for Nuleat Science and Their Applications. Lao Zhou, 11-13,Oct., 1983.
[2]	Sternberg, Z. W., BNL Int. Report AGS 77-4,1977.
[3]	Prelec, K., BNL, AGs Division H~-Technical Note, No.52, 1980.
[4]	Alessi, J. and Sluyters.T., BNL, AGS Division H~-Technical Note, No. 55,1980．