摘要:
高能激光会造成吸收体材料表面的温度急剧升高甚至损坏,同时造成吸收体上长期存在较大的温度梯度,这给温度的准确测量造成了很大的难度,为解决上述问题,提出了一种阶梯状镀金反射锥和V型槽结构的吸收体,通过对镀金锥的设计将能量分配到吸收体各部分上,研究了V型槽的几种设计方法对温度场和表面温度的影响,研究表明通过对吸收体各部分的质量和V型槽的参数控制可以大幅降低吸收体各部分的温度梯度、吸收体表面温度和吸收体的平衡时间,从而提高高能激光能量计的激光损伤阈值,并降低温度准确测量难度和减少热损失,最终达到提高准确度的目的。
Abstract:
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.
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