基于多层吸收法的6 MeV电子能谱重建的研究

电子能谱的测量是电子加速器性能检测的重要环节。本文设计了一种新的测量方法--多层吸收法来对电子能谱进行测量，它是基于在辐照电子加速器上应用最多的射程法，加入Monte-Carlo模拟和迭代算法而重建出入射电子能谱的一种方法。该方法具有操作简便、测量准确、无需复杂设备等优点。本文用该方法对6 MeV加速器的电子能谱进行了测量，得到了较好的结果，且与磁谱仪的测量结果在误差范围内符合得很好，验证了其可行性。

Study on 6 MeV Electron Energy Spectrum Reconstruction Based on Multi-layer Absorption Method

The measurement of electron energy spectrum is an important part of the per-formance test of electron accelerator.A new method named multi-layer absorption method to measure the electron energy spectrum was designed in this paper.It is based on the depth-dose curves method,which can be used in most irradiation accelerators, and the Monte-Carlo simulation and iterative algorithm were added so as to reconstruct the electron energy spectrum.This method is easy,accurate and needs no complicated equipment.This method was used to measure the spectrum of 6 MeV electron accelera-tor,and the good results were obtained.The results agree well with the measurement results of magnetic spectrometer in the error range,and it proves that the credibility is very high.