9:30 AM - 9:45 AM
△ [20a-KD-2] Quantification of N2 Rotational Temperature Distribution obtained by Spectral Imaging
Keywords:Spectroscopic imaging method,Rotational temperature,quantification
Spectroscopic method which gives no disturbance to the measuring object has been used as a reliable diagnostic technique for non-thermal plasma. However, plasma parameter measured by spectroscopic method is only a spatially averaged data in a photometric point. Therefore, revealing a spatial distribution of plasma parameter still remains an open research problem.
An experimental method of determining a two-dimensional (2D) image of the N2 rotational temperature in stationary atmospheric non-thermal plasma by spectroscopic imaging was presented. In the experiment, a steady-state glow corona discharge was generated by applying a positive DC voltage to a rod-plane electrode in synthetic air (N2: 79%, O2: 21%). The diameter of rod electrode was 20 mm.
Spectral images of a positive DC glow corona were taken using a gated Intensified Charge-Coupled Device (ICCD) camera with ultra narrow band-pass filters, corresponding to the head and tail of a N2 second positive system band (0-2). The qualitative N2 rotational temperature was obtained from the emission intensity ratio between the head and tail of the N2 second positive system band (0-2).
In this work, the calibration date of the emission intensity ratio between the head and tail of the (0-2) band of nitrogen second positive system (IA2Phead/IA2Ptail) for the absolute gas temperature was accumulated. IA2Phead and IA2Ptail were intensity area of head and tail of N2 second positive system band (0,2), respectively. On the basis of the calibration date, a spectroscopically-imaged qualitative 2D I2Ptail/I2Phead distribution in positive DC steady-state glow corona was converted to a quantitative 2D image of gas rotational temperature.
An experimental method of determining a two-dimensional (2D) image of the N2 rotational temperature in stationary atmospheric non-thermal plasma by spectroscopic imaging was presented. In the experiment, a steady-state glow corona discharge was generated by applying a positive DC voltage to a rod-plane electrode in synthetic air (N2: 79%, O2: 21%). The diameter of rod electrode was 20 mm.
Spectral images of a positive DC glow corona were taken using a gated Intensified Charge-Coupled Device (ICCD) camera with ultra narrow band-pass filters, corresponding to the head and tail of a N2 second positive system band (0-2). The qualitative N2 rotational temperature was obtained from the emission intensity ratio between the head and tail of the N2 second positive system band (0-2).
In this work, the calibration date of the emission intensity ratio between the head and tail of the (0-2) band of nitrogen second positive system (IA2Phead/IA2Ptail) for the absolute gas temperature was accumulated. IA2Phead and IA2Ptail were intensity area of head and tail of N2 second positive system band (0,2), respectively. On the basis of the calibration date, a spectroscopically-imaged qualitative 2D I2Ptail/I2Phead distribution in positive DC steady-state glow corona was converted to a quantitative 2D image of gas rotational temperature.