Evaluation of temperature in corona discharges in liquid argon (original) (raw)

Proceedings of 1999 IEEE 13th International Conference on Dielectric Liquids (ICDL'99) (Cat. No.99CH36213), 1999

Abstract

Previous studies of the electrical conduction phenomena in argon using point plane electrodes have shown that corona from low pressure gas (P∞>0.2 MPa) up to the liquid state. Moreover, electrical and transport parameters are mainly a function of fluid density N. For each density, above a threshold voltage Vk, the electric current I which is space charge limited is correlated to an intense light emission confined close to the tip needle. The spectral analysis of the emitted light can be used to evaluate some parameters of this non equilibrium weakly ionised region. For example, the kinetic temperature Tk in the corona region has been deduced from pressure broadening of several selected lines of argon

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