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神光Ⅱ装置精密化功率平衡要求8路子光束的输出能量平衡和脉冲波形一致,即每条放大链的增益和透过率相同。但装置因日常打靶工作需要,8路子光束放大链中同级放大器的增益能力差异较大。针对该问题,利用一种精度优于1％的小能量测量系统,对神光Ⅱ装置8路四级放大器的小信号增益进行在线测量,分别得到了40,70棒状放大器,100片状放大器和200双层片状放大器在正常工作电压下的小信号增益值,掌握了每路各级放大器的增益特性,精确量化了各路同级放大器的差异,为神光Ⅱ精密化功率平衡调试提供了宝贵的实验数据。
The precision power balance of SG2 requires that the output energy balance of the 8-way beam be consistent with the pulse waveform, that is, the gain and the transmittance of each amplification chain are the same. However, due to the daily shooting equipment needs, 8-way sub-beam amplifier chain amplification gain at the same level larger differences. In order to solve this problem, a small energy measurement system with accuracy better than 1% is used to measure the small signal gain of SG8 amplifier of Class 4 and 4, 70, 70 and 100 respectively 200 double-layer chip amplifier in the normal operating voltage of the small signal gain value, grasping the gain characteristics of each amplifier at all levels, accurately quantify the difference between the same amplifier, SGT II precision power balance debugging provided Valuable experimental data.