【摘要】 FELiChEM光强测量系统用于测量IRFEL的宏脉冲,该系统包括光路设计、热释电探测器及电子学、衰减器等。对测量系统进行了离线和在线测试,离线测试和仿真分析表明热释电探测器电压灵敏度可调,最高为25 V/W,带宽能够满足不同测量需求,可测量亚μs到μs量级上升沿的脉冲波形;在线测试结果与CAEP THz装置的低温锗掺镓探测器测试结果相似。两个测试结果说明设计的光强测量系统可以满足将来FELiChEM装置饱和出光后的测量需求。更多还原

【Abstract】 The laser intensity measurement system of the FELiChEM is used to measure the macro-pulse of the IRFEL.The system includes designing of the optical path,pyroelectric detectors and electronics and attenuators.Measurement system has been tested offline and online respectively.The offline test and simulation results show that the pyroelectric detector has adjustable voltage responsivity(up to 25 V/W)and bandwidth to meet different measurement and test requirements(the sub-μs to μs rising edge of the pulse can be measured).The online test results are similar to the low temperature Ge:Ga detector in the CAEP THz-FEL facility.Two test results indicate that the laser intensity measurement system can meet the measurement requirements of the FELiChEM facility after saturation.更多还原