论文标题
磁场对HPGE跟踪检测器的影响
Effects of Magnetic Fields on HPGe Tracking Detectors
论文作者
论文摘要
我们介绍了磁场对超辉石探测器的位置分辨率和能量响应的影响。我们的结果提供了对与大光谱仪一起操作时（边缘）磁场的追踪阵列解决能力的潜在影响的现实估计。通过在存在电场和磁场的情况下求解电子和孔的运动方程，我们分析了电荷载体的漂移轨迹，以确定轨迹终点处的位置的偏差，以及影响能量分辨率和由于陷阱而影响能量分辨率和峰值变化的漂移长度的变化。我们的结果表明，主要效果在于横向（到电场方向）位置的偏差，并表明，如果在脉搏形状和跟踪数据分析程序中未采取纠正措施，则野外强度$ \ gtrsim $ 0.1 T将开始影响2 mm（RMS）的内在位置分辨率（RMS）。在高于$ \ sim $ 1 t的字段上，能量响应的降解变得可观察到。
We present a study of magnetic fields effects on the position resolution and energy response of hyper-pure germanium detectors. Our results provide realistic estimates of the potential impact on the resolving power of tracking-arrays from (fringe) magnetic fields present when operating together with large spectrometers. By solving the equations of motion for the electron and holes in the presence of both electric and magnetic fields, we analyzed the drift trajectories of the charge carriers to determine the deviations in the positions at the end point of the trajectories, as well as changes in drift lengths affecting the energy resolution and peak shift due to trapping. Our results show that the major effect is in the deviation of the transverse (to the electric field direction) position and suggest that, if no corrective action is taken in the pulse-shape and tracking data analysis procedures, a field strength $\gtrsim$ 0.1 T will start to impact the intrinsic position resolution of 2 mm (RMS). At fields above $\sim$1 T, the degradation of the energy response becomes observable.
