Spectrometry in radiation fields generated by high power lasers is challenging, since the radiation is created in ultra short pulses (10^-14–10^-12 s) and thus standard spectrometric methods cannot be applied. The electromagnetic calorimeter developed within this study is an active system that can be used for such spectrometry in the energy range from tens of keV to tens of MeV; even for high repetition rate petawatt class laser systems (10 Hz). The calorimeter comprises of a set of scintillators that are wrapped in PTFE and placed into a 3D printed holder. Scintillation light is detected by a CMOS camera, the acquired dose-depth curve is then evaluated by a dedicated unfolding algorithm. In this paper, the calibration of the calorimeter using Cs-137 and Co-60 radioactive sources is presented. The results demonstrate the developed calorimeter is able to determine energy of impinging radiation with an uncertainty of approximately 10%.

高功率激光器产生的辐射场中的光谱测定具有挑战性，因为辐射是在超短脉冲 (10 ^-14 –10 ^-12s)，因此不能应用标准光谱方法。在这项研究中开发的电磁量热仪是一个有源系统，可用于从几十 ​​keV 到几十 MeV 的能量范围内的这种光谱测量；即使对于高重复频率拍瓦级激光系统 (10 Hz)。热量计由一组闪烁体组成，这些闪烁体用 PTFE 包裹并放置在 3D 打印支架中。闪烁光由 CMOS 相机检测，然后通过专用展开算法评估获取的剂量深度曲线。在本文中，介绍了使用 Cs-137 和 Co-60 放射源校准量热仪。结果表明，开发的热量计能够以大约 10% 的不确定性确定撞击辐射的能量。