Morphology determination of multi-needle-to-plate positive corona discharge

作者：Su Peng hao; Zhu Yi min^*; Chen Hai feng

来源：Spectroscopy and Spectral Analysis, 2008, 28(9): 1998-2002.

DOI：10.3964/j.issn.1000-0593(2008)09-1998-05

• emission spectrum
• glow discharge
• streamer discharge
• ionization region
• streamer channel
• electron avalanche
• energetic electron
• N-2 second positive band's intensity

Using the method of OES (optical emission spectrum) for measuring N-2 emission spectrum, the distribution of the energetic electrons in multi-needle-to-plate positive corona discharge at atmospheric pressure was investigated, and compared with that in negative corona discharge. According to the distribution of N-2 second positive band's intensity I-SPB, the outline of the ionization region in glow discharge and the streamer channel were drawn rather accurately. The relationship between I-SPB and the discharge current I in glow discharge can be obtained through the volume integral of the I-SPB. In glow discharge, both the ionization region scale and I-SPB are smaller than in negative corona discharge, the electron avalanche develops farther along the radius direction of needle than along axis direction, and only the arrange along axis direction is enhanced slightly with the rise of the applied voltage U. The integral of I-SPB is second order linear to 1. In streamer discharge, the discharge channels develop from needlepoint to the plate, while the shape of the region in which I-SPB is higher looks like a bullet. The density of energetic electron in the channel farther away from the needlepoint is relatively uniform along the axis direction, but first increases then decreases along the radius direction.

• 出版日期2008-9
• 单位大连海事大学