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Optical emission spectroscopy and fast, time-resolved imaging are used to assess the plasma parameters in the plasma channel of a pulsed power electrical discharge in gas bubbles. Gas bubbles are produced at the tip of a needle electrode submerged in water. The discharge in Ar, O2, and air bubbles is generated by applying 1 ??s long, 8-20 kV rectangular voltage pulses to the needle electrode. Spectroscopic...
Summary form given only. Pulsed electrical discharges in water have been investigated for water decontamination and decoloration. The optimization of the cleaning process requires detailed knowledge of the discharge process, particularly in terms of the formation of active species such as OH, O, and other radicals. Rectangular voltage pulses of 1 mus duration are applied to single Ar or oxygen bubbles...
Summary form only given. Electrical discharges in gas bubbles in water are investigated by applying microsecond long rectangular pulses of 10-20 kV to needle-to-plane electrodes submerged in water. Gas is bubbled into the water through the high voltage Pt needle electrode. The voltage across the electrodes and the current to the ground are measured. Electrical measurements suggest that a corona-type...
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