快平衡全吸收式高能激光能量计  

Fast thermal balancing full absorbing HEL calorimeter

作　　者：戢运峰[1,2] 刘卫平[1] 段刘华[1,2] 姜畅[1] 何中敏[1] 徐作冬[1] 王飞[1,2] 王莉[1] 

机构地区：[1]西北核技术研究所,陕西西安710024 [2]激光与物质相互作用国家重点实验室,陕西西安710024

出　　处：《红外与激光工程》2013年第2期387-391,共5页Infrared and Laser Engineering

基　　金：国防预研基金(22111004)

摘　　要：基于量热原理研制了固态全吸收式高能激光能量计。通过对能量吸收模型的数值分析,设计了分段隔热式激光吸收腔体,该腔体具备较高的抗激光破坏阈值、快速热平衡特性和高能量吸收率。设计了适用于分段式腔体测温的温度场探测器阵列,并依据温度场信号特征提出了用于激光能量计算的能量沉积算法。该算法对于强度空间分布不规则的高能激光能量还原计算具有良好的适应性。验证实验结果表明,该能量计在数百千焦耳的量程范围内具有较好的重复性和测量精度。A new solid-state calorimeter fo r intense lasers was presented.A numerical calculation model was setup to study the laser absorbed procedure.An energy absorbing cavity,constructed with several segments that were nearly heat insulating from each other,was designed,which had characteristics of high threshold on laser induced damage,fast thermal balancing and higher energy absorbed ratio.A detector array was designed for temperatures measurements.According to the temperatures response characteristics of the segmented cavity,a calculating method,based on energy deposition,was developed to obtain the accurate laser energy,which had good adaptability on irregular laser energy intensity distributions.The results of validating experiments show that the calorimeter has good repetition and accuracy within the range of hundreds of kilo-joules.

关 键 词：全吸收 能量计 高能激光 

分 类 号：TN247[电子电信—物理电子学]