CAJ | 학술논문

在介质阻挡放电系统中，空气和氩气混合气体的实验条件下，第一次实现了只具有一个单元结构的白眼斑图。该斑图的结构从中心位置向外依次为：中心点，围绕中心点的环和环外六个点。由于出现该单晶胞白眼斑图时的电压较低，而本实验采用的水电极中的水的比热容大，具有良好的吸热性，这使斑图在放电过程中放电气隙间的气体的温度没有升高，并且放电现象没有发生变化。因此在实验过程中，单晶胞白眼斑图在长时间放电的情况下并没有使其等离子体状态发生改变。由普通照相机所拍摄的图片可以看到，单晶胞白眼斑图的中心点，围绕中心点的环和环外六个点的亮度有明显不同。在不同压强下该斑图的稳定性有所不同，并且中心点，围绕中心点的环和环外六个点的亮度随压强的变化有所不同。鉴于此，本实验采用了发射光谱法，研究了单晶胞白眼斑图中不同位置处（中心点、环及外围六个点）的等离子体温度随压强的变化关系。其中，分子振动温度使用氮分子第二正带系（ C3Πu → B3Πg ）的发射谱线来计算；电子激发温度利用氩原子763.26 nm （2 P6→1 S5）与772.13 nm （2 P2→1 S3）两条谱线强度值进行比较的方法进行研究；电子密度利用氩原子696.57 nm （2 P2→1 S5）谱线的展宽来测量。发现在同一实验条件下，单晶胞白眼斑图的中心点的电子激发温度、电子密度和分子振动温度均最低，环外六个点相应的电子激发温度、电子密度和分子振动温度次之，环相应的电子激发温度、电子密度和分子振动温度均最高；随着气体压强从40 kPa增大到60 kPa ，单晶胞白眼斑图不同位置处的电子密度增高但分子振动温度和电子激发温度均降低。本实验结果有助于进一步研究自组织斑图形成的机制。
재개질조당방전계통중，공기화아기혼합기체적실험조건하，제일차실현료지구유일개단원결구적백안반도。해반도적결구종중심위치향외의차위：중심점，위요중심점적배화배외륙개점。유우출현해단정포백안반도시적전압교저，이본실험채용적수전겁중적수적비열용대，구유량호적흡열성，저사반도재방전과정중방전기극간적기체적온도몰유승고，병차방전현상몰유발생변화。인차재실험과정중，단정포백안반도재장시간방전적정황하병몰유사기등리자체상태발생개변。유보통조상궤소박섭적도편가이간도，단정포백안반도적중심점，위요중심점적배화배외륙개점적량도유명현불동。재불동압강하해반도적은정성유소불동，병차중심점，위요중심점적배화배외륙개점적량도수압강적변화유소불동。감우차，본실험채용료발사광보법，연구료단정포백안반도중불동위치처（중심점、배급외위륙개점）적등리자체온도수압강적변화관계。기중，분자진동온도사용담분자제이정대계（ C3Πu → B3Πg ）적발사보선래계산；전자격발온도이용아원자763.26 nm （2 P6→1 S5）여772.13 nm （2 P2→1 S3）량조보선강도치진행비교적방법진행연구；전자밀도이용아원자696.57 nm （2 P2→1 S5）보선적전관래측량。발현재동일실험조건하，단정포백안반도적중심점적전자격발온도、전자밀도화분자진동온도균최저，배외륙개점상응적전자격발온도、전자밀도화분자진동온도차지，배상응적전자격발온도、전자밀도화분자진동온도균최고；수착기체압강종40 kPa증대도60 kPa ，단정포백안반도불동위치처적전자밀도증고단분자진동온도화전자격발온도균강저。본실험결과유조우진일보연구자조직반도형성적궤제。
The white‐eye pattern was firstly observed and investigated in a dielectric barrier discharge system in the mixture of argon and air whose content can be varied whenever necessary ,and the study shows that the white‐eye cell is an interleaving of three different hexagonal sub‐structures :the center spot ,the halo ,and the ambient spots .The white‐eye pattern is observed at a lower applied voltage .In this experiment ,the heat capacity of water is high so that the water in water electrode is good at ab‐sorbing heat .In the process of pattern discharging the gas gap didn’t increase its temperature ,and the discharging phenomenon of this pattern has not changed .The temperature of the water electrodes almost keeps unchanged during the whole experiment , which is advantageous for the long term stable measurement .Pictures recorded by ordinary camera with long exposure time in the same argon content condition show that the center spot ,the halo ,and the ambient spots og the white‐eye pattern have differ‐ent brightness ,which may prove that their plasma states are different .And ,it is worth noting that there are obvious differences of brightness not only on the center spot ,the halo ,and the ambient spots at the same pressure but also at the different pressure , which shows that its plasma state also changed with the variation of the pressure .Given this ,in this experiment plasma tempera‐tures of the central spot ,halo ,and ambient spots in a white‐eye pattern at different gas pressure were studied by using optical emission spectra .The molecular vibration temperature is investigated by the emission spectra of nitrogen band of second positive system ( C3Πu → B 3Πg ) .The electron excitation temperature is researched by the relative intensity ratio method of spectral linesofArⅠ763.51nm(2P6 →1S5)andArⅠ772.42nm(2P2 →1S3).Theelectronicdensityisinvestigatedbythebroadening of spectral line 696 .5 nm .Through the analysis of experimental results ,it is found that the molecular vibration temperature , electron excitation temperature and electronic density of the central spot are lowest ,and the plasma parameters of the ambient spots are second ,while the plasma parameters of the halo are highest at the same condition .The molecular vibration temperature and the electron excitation temperature of the three different parts of the pattern (central spot ,halo ,and ambient spots) de‐crease with the pressure increasing from 40 to 60 kPa ,but the electronic density increases .These results are of great important to the formation mechanism of the patterns in dielectric barrier discharge .