Atomic Energy Science and Technology ›› 2020, Vol. 54 ›› Issue (7): 1287-1293.DOI: 10.7538/yzk.2019.youxian.0372

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Influence of Beam Drift on Measurement with Silicon Strip Detector Array

SUN Haohan;LIN Chengjian;MA Nanru;WANG Dongxi;JIA Huiming;YANG Lei;YANG Feng;ZHONG Fupeng;WEN Peiwei;YAO Yongjin   

  1. China Institute of Atomic Energy, Beijing 102413, China;National Innovation Center of Radiation Application, Beijing 102413, China;Guangxi Normal University, Guilin 541004, China; Beihang University, Beijing 100083, China
  • Online:2020-07-20 Published:2020-07-20

束流漂移对硅条探测器阵列测量的影响

孙浩瀚;林承键;马南茹;王东玺;贾会明;杨磊;杨峰;钟福鹏;温培威;姚永进   

  1. 中国原子能科学研究院,北京102413;国防科技工业抗辐照应用技术创新中心,北京102413;广西师范大学,广西 桂林541004;北京航空航天大学,北京100083

Abstract:

The influence of beam drifts on the measurement with silicon strip detector array was discussed, which was characterized by compact structure and large solidangle coverage. Monte Carlo method was used to simulate the effects of beam drifts in different directions and distances on the angular distribution of the decayed α from the fusion-evaporation residual nuclei and the Rutherford scattering. The results indicate that when the beam drift distance is less than 3.0 mm, the symmetry of the detector array can constrain the count error within 10%. The experimental measurements of 6Li+209Bi system at energy of 25 MeV and 40 MeV were performed, and the beam drift was studied using data recorded by the monitor detectors. The results show that the beam drift distances of all runs are less than 3.0 mm. After correcting the beam drifts, the elastic scattering angular distribution at 40 MeV was obtained by three different solid-angle calibration methods, and the result is consistent with the existing data.

Key words: silicon strip detector array, Monte Carlo simulation, beam drift, angular distribution

摘要:

为研究束流漂移对结构紧凑、覆盖立体角较大的硅条探测器阵列测量的影响,利用蒙特卡罗方法,模拟了不同方向、不同大小的束流漂移对熔合蒸发残余核α衰变和卢瑟福散射角分布的影响,表明束流漂移距离小于3.0 mm时,探测器阵列的对称性能将计数误差控制在10%以下。开展了25 MeV和40 MeV 6Li+209Bi体系的实验测量,利用监视器数据研究了束流漂移的情况,结果表明,所有轮次的束流漂移均未超过3.0 mm。对束流漂移进行修正后,用3种不同的立体角刻度方法得到了弹性散射角分布,感兴趣的40 MeV数据与文献数据基本一致。

关键词: 硅条探测器阵列, 蒙特卡罗模拟, 束流漂移, 角分布