The Accumulation Effect in Opaque W Under Repeated Exposure to Grazing Laser Radiation

The laser strength of many materials under multipulse irradiation is usually significantly lower than their laser strength under single-pulse irradiation. The ‘accumulation’ effect reduces the impurity composition and mass of the evaporated substance from the surface of the solid and increases the laser resistance of the solid, the maximum ion charge ratio W in the subthreshold and above the threshold region of the laser power density, without requiring additional laser radiation energy.

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