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Trichel Pulse in Negative DC Corona discharge and Its Electromagnetic Radiations
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 Title & Authors
Trichel Pulse in Negative DC Corona discharge and Its Electromagnetic Radiations
Zhang, Yu; Liu, Li-Juan; Miao, Jin-Song; Peng, Zu-Lin; Ouyang, Ji-Ting;
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We investigate in this paper the radiated electromagnetic waves together with the discharge characteristics of Trichel pulse of negative DC corona discharge in air in pin-to-plate and wire-to-plate configurations. The feature of the current pulse and the frequency spectrum of the electromagnetic radiations were measured under various pressures and gas gaps. The results show that the repetition frequency and the amplitude of Trichel pulse current depend on the discharge conditions, but the rising time of the pulse relates only to the radius of needle or wire and keeps constant even if the other conditions (including the discharge current, the gas gap and the gas pressure) change. There exists the characterized spectrum of electromagnetic waves from negative corona discharge in Trichel pulse regime. These characterized radiations do not change their frequency at a given cathode geometry even if the averaged current, the gas gap or the air pressure changes, but the amplitude of radiations changes accordingly. The characterized electromagnetic radiations from Trichel pulse corona relate to the formation or the rising edge of current pulse. It confirms that the characterized radiations from Trichel pulse supply information of discharge system and provide a potential method for detecting charged targets.
Negative corona discharge;Trichel pulse;Electromagnetic radiation;Rising time;
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