CAJ | 학술논문

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.
기우량열원리연제료고태전흡수식고능격광능량계.통과대능량흡수모형적수치분석,설계료분단격열식격광흡수강체,해강체구비교고적항격광파배역치、쾌속열평형특성화고능량흡수솔.설계료괄용우분단식강체측온적온도장탐측기진렬,병의거온도장신호특정제출료용우격광능량계산적능량침적산법.해산법대우강도공간분포불규칙적고능격광능량환원계산구유량호적괄응성.험증실험결과표명,해능량계재수백천초이적량정범위내구유교호적중복성화측량정도.
A new solid-state calorimeter for 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.