By studying the relationship among discharge current, discharge voltage and air pressure, we find that the dc HCD operates in a special glow mode, which is an intergrade between normal and abnormal glow discharge.

• 通过对直流空心阴极放电过程的研究,证明其是一种介于正常辉光放电与反常辉光放电之间的一种特殊的辉光放电形式。