从紧凑型14GHz微波离子源中提取负氢离子。

Extraction of negative hydrogen ions from a compact 14 GHz microwave ion source.

作者信息

Wada M, Kasuya T, Kenmotsu T, Maeno S, Nishida T, Nishiura M, Shinto K, Yamaoka H

机构信息

Faculty of Life and Medical Sciences, Doshisha University, Kyoto 610-0321, Japan.

出版信息

Rev Sci Instrum. 2012 Feb;83(2):02A716. doi: 10.1063/1.3672473.

DOI:10.1063/1.3672473

PMID:22380225

Abstract

A pair of permanent magnets has formed enough intensity to realize electron cyclotron resonance condition for a 14 GHz microwave in a 2 cm diameter 9 cm long alumina discharge chamber. A three-electrode extraction system assembled in a magnetic shielding has formed a stable beam of negative hydrogen ions (H(-)) in a direction perpendicular to the magnetic field. The measured H(-) current density was about 1 mA∕cm(2) with only 50 W of discharge power, but the beam intensity had shown saturation against further increase in microwave power. The beam current decreased monotonically against increasing pressure.

摘要

一对永久磁铁产生了足够的强度，以在直径2厘米、长9厘米的氧化铝放电室中实现14吉赫兹微波的电子回旋共振条件。安装在磁屏蔽中的三电极引出系统在垂直于磁场的方向上形成了稳定的负氢离子（H(-)）束。在仅50瓦的放电功率下，测得的H(-)电流密度约为1毫安∕平方厘米，但束流强度随着微波功率的进一步增加而出现饱和。束流随着压力的增加而单调下降。