Scaling Law for the Temperature and Energy of X-Ray in Laser Cavity Targets and in Comparison with Experimental Measurements

Abstract

The dependence of the radiation temperature on the X-ray energy produced by the laser in the cavity targets is investigated in theory according to the information given by the numerical simulation of the laser X-ray conversion, and the corresponding scaling law of them is obtained. The method estimates the X-ray conversion efficiency of the cavity targets. According to the yielded scaling law, the X-ray conversion efficiency of the cavity targets can be determined by the laser absorption efficiency and the radiation temperature measured experimentally. By the method the X-ray conversion efficiency about 45-50%, is obtained for the cavity experiment conducted in 1989,1990, the calculated radiation temperatures about 140-150 ev are in agreement with ones measured for two beam targets, laser energy each beam ≈ 350-650J, pulse width ≈ 0.6-1.1ns.