CAJ | 학술논문

利用针-板介质阻挡放电装置，在4 mm长的气隙中产生了大气压氩气射流等离子体。利用电学方法实现了对放电电流和电荷量的同时测量，并且对放电脉冲数和放电功率进行了研究；利用发射光谱法对放电等离子体进行了空间分辨测量，并根据ArⅠ696.54 nm的Stark展宽计算了等离子体的电子密度。结果发现：随着外加电压的增加，每个周期内的放电脉冲数增加，放电功率也增加。随着针头距离的增加，电子密度由2.94×1015 cm-3逐渐减小到2.28×1015 cm-3。实验结果表明：电场强度对放电脉冲数和电子密度的空间分布起重要作用。
이용침-판개질조당방전장치，재4 mm장적기극중산생료대기압아기사류등리자체。이용전학방법실현료대방전전류화전하량적동시측량，병차대방전맥충수화방전공솔진행료연구；이용발사광보법대방전등리자체진행료공간분변측량，병근거ArⅠ696.54 nm적Stark전관계산료등리자체적전자밀도。결과발현：수착외가전압적증가，매개주기내적방전맥충수증가，방전공솔야증가。수착침두거리적증가，전자밀도유2.94×1015 cm-3축점감소도2.28×1015 cm-3。실험결과표명：전장강도대방전맥충수화전자밀도적공간분포기중요작용。
An atmospheric argon plasma jet was obtained with a needle-plate dielectric barrier dis-charge system. The discharge gap was kept at 4 mm and the argon gas flow rate was 0. 5 L/min. A test capacitor and a test resistance were connected in series in the circuit, and the discharge current and the transport charge were measured simultaneously. The average discharge power in a period of the applied voltage was calculated by Lissajous figure. The plasma jet was investigated spatially by optical emission spectroscopy, and the electron density was estimated by Stark broadening of ArⅠ696. 54 nm. It is found that the discharge is asymmetric at different discharge phases, and more dis-charge current pulses are generated during the positive half cycle of the applied voltage. In addition, with the increasing of the applied voltage, the pulse number and the discharge power increase. Mo-reover, the plasma density is in an order of 1015 cm-3 . With the increasing of the distance from the needle tip, the electron density of the plasma jet decreases from 2. 94 × 1015 cm-3 to 2. 28 × 1015 cm-3 . The results show that the electric field plays an important role in the discharge current num-ber and the spatial distribution of the electron density.