Abstract
A new method of producing high-current plasma which emits intense flashes of light ranging front visible to VUV wavelengths, possibly even to soft x-ray, is proposed for applications to gas laser excitation and preionization, using amorphous filaments formed on ferrite materials as a leading guide for creating a linear plasma channel. This kind of light source, which we call the formed-ferrite flash (FFF), is different in the plasma creation mechanism from surface discharge types that are based essentially on direct gaseous breakdown in the vicinity of the substrates. In FFF, the conductive amorphous formed-ferrite filament has a nonlinear voltage-current characteristic followed by switching to plasma at a threshold voltage Vt, as shown in Fig. 1. When an impulse voltage is applied above the threshold between both ends of the formed-ferrite filament, rapid switching occurs as a consequence of creating high-current plasma along the amorphous filament.
© 1986 Optical Society of America
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