相对论电子探测谱仪的设计及标定

Designing and scaling a relativistic electrons magnetic spectrometer

考虑电子的相对论效应,根据电磁学理论和相对论公式建立了电子磁谱仪的原理;按照该原理设计了电子的磁谱仪,用补偿磁路改善了磁场的均匀性;按照磁谱仪的结构对其进行了测试和标定;以LiF热释光探测器作为记录元件,可获得相对论电子的能量分布.实验上典型的测量结果与国外计算机模拟的结果较好地一致,从而证明电子磁谱仪的可靠性.

A principle of the relativistic electrons magnetic spectrometer has been established by the theo- ry of electromagnetism and relativity. This spectrometer has been designed and improved by using a compensatory magnet. The results of testing and scaling show that the magnetic field of spectrometer is uniform. An energy distribution of the relativistic electrons can be obtained by using a LiF thermolumi- nescent dosimeter （TLD）. The experimental result from the spectrometer is almost in agreement with that from 2D particle in cell （PIC） simulation, which reveals that the designed spectrometer is credible.