Quantitative visualization of gas temperature distribution in atmospheric DC glow corona by spectral image processing

Sasamoto, Ryo; Matsumoto, Takao; Orii, Hideaki; Izawa, Yasuji; Nishijima, Kiyoto

doi:10.1109/ceidp.2016.7785532

Cited by 2 publications

(7 citation statements)

References 8 publications

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“…Figure 5 shows the intensity ratio of SPS(0, 2)tail/SPS(0, 2)head as a function of the T g . 26) The spectra of SPS(0, 2)tail and SPS(0, 2)head were acquired, which can be represented by the following approximation:…”

Section: Resultsmentioning

confidence: 99%

“…T g of Hermstein's glow corona discharge was acquired from the intensity ratio between the tail and head of the N 2 second positive system band (0, 2) [SPS(0, 2)tail/SPS(0, 2)head]. 25,26) The rotation temperature of N 2 is usually equivalent to the T g under atmospheric conditions. SPS(0, 2)tail/SPS(0, 2)head was calculated for each pixel to acquire the T g distribution of Hermstein's glow corona discharge based on the previously determined relationship between SPS(0, 2)tail/SPS(0, 2)head and T g .…”

Section: Spectral Image Processing Methodsmentioning

confidence: 99%

“…SPS(0, 2)tail/SPS(0, 2)head was calculated for each pixel to acquire the T g distribution of Hermstein's glow corona discharge based on the previously determined relationship between SPS(0, 2)tail/SPS(0, 2)head and T g . 25,26) This experiment was adopted to the ultra-narrow band pass filters. The center wavelength and full width at half maximum of the filter for SPS(0, 2)tail were 379.2 nm and 1.17 nm, respectively, while those for SPS(0, 2)head were 380.5 nm and 1.07 nm, respectively.…”

Section: Spectral Image Processing Methodsmentioning

confidence: 99%

“…Spectral image processing can be applied to the spatial distributions of specific spectra. [22][23][24][25][26] In this study, we acquired spectral images by using an intensified chargecoupled device (ICCD) camera with ultra-narrow band pass filters. This method is advantageous for revealing the fine details of distributions at which discharge occurs, and the measurement time is shorter than for OES.…”

Section: Introductionmentioning

confidence: 99%

“…Fig.5. (Color online) Intensity ratio of SPS(0, 2)tail/SPS(0, 2)head as a function of the gas temperature T g 26). …”

mentioning

confidence: 99%

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Estimation of electric field distribution of Hermstein’s glow corona discharge by spectral image processing

Sasamoto

Shirouzu²,

Orii³

et al. 2023

Jpn. J. Appl. Phys.

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We present a spectral image processing method for estimating the distribution of the reduced electric field E/N for Hermstein’s glow corona discharge. This method analyzes spectral images of the discharge taken by an intensified charge-coupled device camera with ultra-narrow bandpass filters at the pixel level. The method requires a shorter measurement time than optical emission spectrometry and can reveal finer details of the spatial distribution. Experiments showed that E/N of discharge at the tip of the electrode locally increases with an increase in the applied voltage. In particular, E/N at the tip of the electrode reaches a high value just before breakdown. Based on the maximum acquired values, breakdown of discharge is estimated to occur when E/N ≥ 270 × 10−21–340 × 10−21 V m2. This study is expected to contribute to monitoring the discharge state of electrical equipment to prevent breakdown and ensure safety.

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Section: Resultsmentioning

confidence: 99%

Section: Spectral Image Processing Methodsmentioning

confidence: 99%

Section: Spectral Image Processing Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Fig.5. (Color online) Intensity ratio of SPS(0, 2)tail/SPS(0, 2)head as a function of the gas temperature T g 26). …”

mentioning

confidence: 99%

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Estimation of electric field distribution of Hermstein’s glow corona discharge by spectral image processing

Sasamoto

Shirouzu²,

Orii³

et al. 2023

Jpn. J. Appl. Phys.

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Investigating the Influence of Free-Electron Pulses and Neutral Excited Species Formation on Discharge Development: By PD Quantum Optics Analysis and Plasma Simulation

Feng,

Cai,

Yuan

et al. 2024

IEEE Access

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Previous studies on discharge dynamics have primarily focused on the generation and migration of the charged particles and neglecting the influence of neutral excited-state particles. In this study, an integrated approach combining experiment and simulation was used to investigate the effect of neutral excited particles on discharge development. Firstly, partial discharge was induced by applying voltage to a pin-plate electrode in a darkroom environment and the emission spectrum of discharge was captured using an ultra-sensitive spectrometer. Then the formation mechanism of the main neutral excited particles in air corona discharge was analyzed based on the principle of quantum optics, and the collision cross-section data of the non-local thermodynamic equilibrium (NLTE) plasma chemical model for air was updated accordingly. Simulations revealed the process of electron pulses initiates the electron avalanche, which leads to dielectric breakdown. Results indicated that overvoltage can lead to the formation of electron avalanches at defect sites, which is capable of causing dielectric breakdown within the nanosecond time scale. The competitive mechanism of the excitation reactions to ionization reactions results in the dissipation of free electrons' energy, effectively suppressing the development of electron avalanches and preventing electrical breakdown.

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Quantitative visualization of gas temperature distribution in atmospheric DC glow corona by spectral image processing

Cited by 2 publications

References 8 publications

Estimation of electric field distribution of Hermstein’s glow corona discharge by spectral image processing

Estimation of electric field distribution of Hermstein’s glow corona discharge by spectral image processing

Investigating the Influence of Free-Electron Pulses and Neutral Excited Species Formation on Discharge Development: By PD Quantum Optics Analysis and Plasma Simulation

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