METHOD OF DETERMINING PLASMA GENERATION THRESHOLD UNDER ACTION OF MONOPULSE LASER RADIATION ON POLISHED METALLIC SURFACE

摘要

Usage: to determine the plasma formation threshold at action mono2 pulsed laser light on the polished metal surface, in particular to determine the radiation resistance of the metal mirror surface. SUMMARY: land surface under study monopulse sequentially irradiated with laser radiation while increasing the laser pulse energy and energy density are recorded simultaneously in claim THe, then after each examined surface portions monopulse additionally probed elliptically polarized monochromatic radiation with a wavelength in the visible spectrum at an angle QH50-75 degrees, measured phase shift A reflected radiation relative to the incident, plotting a graph of shear energy Dot density n phases laser radiation, and a plasma formation threshold is judged by the magnitude of the laser radiation energy density, corresponding to the maximum hopping parameter on the curve at which dA / dE On d D / dE 0, where ue energy density of the laser radiation .5 yl. JV with oo Oh oh yu yu 4