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  • Title: Laser-filament-induced corona discharges and remote measurements of electric fields.
    Author: Sugiyama K, Fujii T, Miki M, Yamaguchi M, Zhidkov A, Hotta E, Nemoto K.
    Journal: Opt Lett; 2009 Oct 01; 34(19):2964-6. PubMed ID: 19794783.
    Abstract:
    Femtosecond laser pulses were used to make plasma filaments near an isolated positively or negatively highly biased electrode. The electrode was well positioned to sustain a high voltage up to U(max)=+/-400 kV to avoid the induced breakdown or a glow discharge; the shape of the electrode was chosen to reduce the corona effects at the maximal voltage. The filament's UV emission is shown to be very sensitive to the voltage applied: it increases nonlinearly with the electrode potential. Along with nanosecond filament-induced flashes at both polarities, long, about a half microsecond, corona flashes were observed at the negative polarity.
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