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在对空间带电粒子进行探测时,大量电子的混入会减少半导体探测器的寿命和工作效率,同时电子的噪声本底也是影响测量精度的重要因素.为了减少电子的影响,需要在离子探测器的探头中加上合适的偏转磁铁用来屏蔽电子的干扰.本文中,磁铁的结构设计借鉴了国外的成功经验,并通过有限元的方法来计算磁场的强度,选择合适的方案消除漏磁的影响以及模拟电子在磁场的轨迹来估计磁场对电子的偏转能力.并用理论计算的数据与实验结果进行了比对,得到了比较好的结果.最后针对空间粒子探测中的偏转磁铁设计提出了一些建议.加偏转磁场的技术也是我国在星载粒子探测器中的首次应用.
In the detection of charged particles in the space, a large number of electronic mixing will reduce the life of semiconductor detectors and work efficiency, while the electronic noise floor is also an important factor affecting the measurement accuracy.In order to reduce the impact of electrons in the ion detector In this paper, the magnet structure design draws on the successful experience of foreign countries, and through the finite element method to calculate the strength of the magnetic field, select the appropriate program to eliminate the impact of magnetic flux leakage As well as to simulate the trajectory of the electron in the magnetic field to estimate the deflection of the magnetic field on the electron.And the calculated data are compared with the experimental results to get the better results.Finally, some suggestions are put forward for the design of the deflection magnet in the space particle detection The technology of adding deflection magnetic field is also the first application of our country in spaceborne particle detector.