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《Chinese Journal of Lasers》 2005-01
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Study on Low Pressure Discharge Character of Capillary Discharge

CHENG Yuan-li 1, ZHAO Yong-peng 1, GAO Ying-jian 1, XIAO Yi-fan 1, LIU peng 1, WANG Qi 1, Yang Da-wei 2 1National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China 2China Institute of Atomic Energy, Beijing 102413, China  
The breakdown characteristics of capillary discharge are measured in Ar and He gases within the pressure range from 120 Pa to 10 Pa, which is the range for lasing by capillary discharge. The experimental results indicate that at least ~10 kV of discharge voltage is required for the breakdown of gas filled in a capillary of 3 mm in diameter and 90 mm in length, which is much higher than that needed in parallel electrode system. The breakdown voltage is also greatly affected by the surface shape of electrode in low pressure. Studies show that the impedances of capillary for different lengths of gas column under the different discharge voltages represent the same character. The impedances reach the same minimum of ~5 Ω when the discharge currents reach the peak value, which makes it possible to obtain the same current peak value at the same discharge voltage for different lengths of capillary.
【Fund】: 国家自然科学基金(60038010);; 国家863计划(2002AA84ts23)资助项目
【CateGory Index】: TN248.6
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