Controlling technology of temperature field for absorbers of gilded-reflection-cone high energy laser energy meter

High energy laser will sharply increase the surface temperature of the absorbers until the surfaces of them are damaged, meanwhile, there is a large temperature gradient for a long time, which makes it difficult to accurately measure the temperature of the absorbers. In order to solve this problem, this paper presents a stepped gilded-reflection-cone absorber with V-grooves. Energy was allocated to various parts of the absorbent body with the design of gilded cone, the effects of two designs of V-groove absorber on the temperature field and the surface temperature were studied. It is shown that the temperature gradient of each part of the absorber, the surface temperature and the equilibration time were decreased by controlling the quality of the absorbers and parameters of the V-cone absorbers, so as to improve laser damage threshold of high-energy laser energy meter and reduce the difficulty of temperature measurement and heat loss, and ultimately improve the accuracy of measurement.