Discharge ignition characteristics of pulsed radio-frequency glow discharges in atmospheric helium

作者：Shi Jianjun^*; Cai Yeqing; Zhang Jie; Ding Ke; Zhang Jing

来源：Physics of Plasmas, 2009, 16(7): 070702.

DOI：10.1063/1.3184824

• glow discharges
• helium
• high-frequency discharges
• ignition
• spatiotemporal phenomena
• time resolved spectra

An experimental study of radio-frequency (15 MHz) glow discharges in atmospheric helium modulated by pulses with repetition frequency of 500 kHz and duty cycle of 6% and 8% is presented in this paper. In each discharge burst, the discharge is restricted to operate in ignition phase with duration of one or two radio-frequency cycles. The ignition characteristics in terms of spatial-temporal evolution of discharge interelectrode structure and optical emission intensity are investigated by time resolved imaging. Optical emission intensities at lines of 706 and 777 nm are used to capture clearly the temporal evolution of energetic electrons and active specie of atom oxygen generated in discharge.

• 出版日期2009-7
• 单位东华大学