中国焊接
中國銲接
중국한접
CHINA WELDING
2014年
4期
13-17
,共5页
许建平%巩春志%吴明忠%田修波
許建平%鞏春誌%吳明忠%田脩波
허건평%공춘지%오명충%전수파
radio frequency discharge%discharge mode transition%hollow cathode%vacuum arc
The technique ofglow discharges in radio frequency configuration was applied to ignite hollow cathode vacuum arc discharge.The effect of discharge parameters on the building up of hollow cathode arc discharge was investigated.The emission spectrum during the vacuum arc ignition process was measured to disclose the discharge dynamics.There exists a threshold radio frequency power (300 W),beyond which hollow cathode is in γmode discharge status while radio frequency discharge changes into the arc discharge.With the increase of the radio frequency power,the plasma temperature and electronic density increase,and the discharge mode transits more rapidly.The ignition time ofhollow cathode vacuum arc discharge is less than 4 s with a radio frequency power of700 W.
