研制出了一种用于强脉冲γ射线能谱测量的能谱仪, 在感应电压叠加器实验平台上, 测量了阳极杆箍缩二极管产生的强脉冲γ射线能谱。选择适合强脉冲γ射线测量的Si-PIN探测器阵列和铅过滤片作为测量系统, 通过在能谱仪的前部放置不同厚度的铅衰减片, 测量了感应电压叠加器的强脉冲γ射线的强度。理论计算了不同能量的光子经过不同厚度的铅衰减片以后在探测器阵列上的能量沉积, 得到了探测器的灵敏度曲线。利用探测器上的理论计算的电荷量和实验波形的对应关系, 求解了该加速器的能谱。光子的最高能量约为1.44 MeV, 平均能量为0.68 MeV, 其中能量在0.4~0.8 MeV范围内的光子数最多, 占74.3%。

An energy spectrometer use to measured the intense γ-ray was developed and preliminary experimental results was obtained at rod pinch diode on inductive voltage adder(IVA). Si-PIN detectors array and Pb attenuato were used to design the energy spectrometer. The intensity of pulse γ-ray on IVA was measured by placing different thickness Pb plate in front of the energy spectrometer. Using the Monte-Carlo code, the energy deposition in sensitive region of Si-PIN detectors was calculated when the photons of different energies transmitted throngh the Pb plate. The sensitive curve of the detectors was obtained. Using correlation of theoretical quantity of electric charge and experimental waveform, the primal energy spectrum was calculated. The highest energy of the photons on IVA was 1.44 MeV and the average energy was 0.68 MeV, in which the number ratio of the 0.4～0.8 MeV photons was 0.74．