中文摘要：

为了能减小放电装置的体积,以应用于便携式仪器,设计了线-筒型大气压直流辉光放电装置,放电间隙仅1.92mm。它主要由内线电极、外筒电极组成,线电极直径为0.16mm,筒电极直径为4mm。观察并说明了从电晕放电向辉光放电过渡的过程。通过放电波形和图像验证了其处于辉光放电状态。推导了利用氮气第二正带系计算振动温度和转动温度的算法,并利用光谱仪（Acton Spectrapro 2500i）采集所产生的等离子体的发射光谱,计算得到该等离子体的振动温度在2 360K左右,转动温度在830K左右。将该装置作为离子源应用于敞开式质谱中,实验结果表明,该直流大气压辉光放电形成的等离子体可以很好地离子化甲酸、乙酸、苯酚等物质。

英文摘要：

In order to reduce the volume and be used in portable instruments,a line-cylinder atmospheric glow discharge device with a 1.92 mm discharge gap is designed.It mainly consists of an inner line electrode and an outer cylinder electrode.The diameters of the line and cylinder electrodes are 0.16 and 4 mm,respectively.The transition from corona discharge to glow discharge is observed and explained.By using discharge waveform and photo,it has been verified that it is a glow discharge.The calculation methods of vibrational temperature and rotational temperature are deduced by use of the N2 second positive band system.The emission spectrum of the plasma is collected by spectrometer（Acton Spectrapro 2500i）.From calculation,it is found that the vibrational temperature of the plasma is about 2 360 K and the rotational temperature of the plasma is about 830 K.The device is used as an ion source in the ambient mass spectrometer.The experiment results show that the plasma generated by DC glow discharge can well ionize the formic acid,acetic acid,and phenol,etc.