摘要
利用双水电极介质阻挡放电装置 ,采用光谱方法测量了大气压氩气介质阻挡放电微放电通道中的电子温度的时间演化 .选取波长为 6 96 5 4nm(2P2 → 1S5) ,76 3 5 1nm(2P6 → 1S5) ,772 4 2nm(2P2 → 1S3)的氩原子谱线进行了时间分辨测量 .实验发现在放电期间 ,电压波形开始下降 ,在放电熄灭后又开始上升 .高能级为 2P2 的跃迁 (772 4 2nm和6 96 5 4nm)比 2P6 的跃迁 76 3 5 1nm要延迟几十ns.根据其时间分辨谱 ,估算了微放电中的电子激发温度的时间演化 ,结果表明 ,电子激发温度并不是一个恒定值 ,而是随时间变化的 .当放电电流达到最大值 ,即电子密度达到最大值时 ,其电子温度并未达到最大值 ,而经过 2 0 0ns后才达到最大值 .
The temporal evolution of electron excited temperature of micro-discharge in dielectric barrier discharge (DBD) in argon at atmospheric pressure is studied by spectroscopy method. The time-resolved spectra of 696.54nm (P-2(2)-1S(5)), 763.51 nm (2P(6)→ 1S(5)) and 772.42nm (2P(2)→ 1S(3)) Ar are measured. It is found that the voltage decreases during the discharge, and increases after the discharge quenched. The transition of lower level 2P(6)(763.51nm) is some dozens of ns ahead of the transitions of higher level 2P(2) (772.42nm and 696.54nm). According to the time-resolved spectrum, the electron excited temperature is estimated during the discharges. It is shown that the temperature is not a constant. It is variable with the time. The peak value of temperature exists about two hundred ns time-delay after the peak value of the discharge current. It is shown that the electron excited temperature does not reach its peak value when the electron density is at the peak value. And the electron excited temperature reaches the peak value 200ns late.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第5期2167-2171,共5页
Acta Physica Sinica
基金
国家自然科学基金 (批准号 :10 3 75 0 15 )
教育部重点科学研究项目 (批准号 :0 2 0 2 0 )
河北省科学攻关项目 (批准号 :0 12 12 180 )
河北省教育厅博士基金 (批准号 :B2 0 0 1112 )
河北省自然科学基金 (批准号 :A2 0 0 40 0 0 0 86)资助的课题 .~~
关键词
大气压介质阻挡放电
发射光谱
电子激发温度
微放电通道
等离子体
dielectric barrier discharge at atmospheric pressure
emission spectrum
electron-excited temperature
micro-discharge channel
