新型望远镜带电粒子探测系统结构设计与理论模拟

摘要

为了在兰州重离子加速器国家实验室（HIRFL）的放射性束流线（RIBLL1）上开展基于完全运动学测量的远离β稳定线奇异核反应机制的研究，需研制一套由多个独立的望远镜系统（探测模块）组成的带电粒子探测阵列。每个探测模块包含1块16×16的厚65μm的双面硅条探测器、1块4×4的厚1000μm的像素硅探测器和由雪崩光二极管（APD）读出的4×4 CsI（Tl）阵列探测器。该探测阵列可实现大的能量测量范围、高能量分辨率和位置分辨，同时具备大立体角覆盖和粒子关联测量的能力。通过Geant4探测器模拟软件对单个探测模块进行模拟，结合对探测模块各部分的实验测试，给出了探测模块的设计方案和整体性能指标。%In order to study the reaction mechanism of exotic nuclei far from β stability line based on complete kinematic measurement on the Radioactive Ion Beam Line in Lanzhou (RIBLL1) at the Heavy‐Ion Research Facility in Lanzhou (HIRFL) ,a charged particle detector array ,which is composed of multiple identical telescope systems ,is needed to be developed .Each telescope ,a full function detector module ,consists of a double‐side silicon strip‐detector (16 × 16 ) with thickness of 65 μm , a pixel‐silicon detector with 16 (4 × 4) pixels with thickness of 1 000μm ,and an array of 4 × 4 CsI(Tl) crystals with length of 5 cm which are read out by avalanche photo diodes (APD) .The detector array has performance characteristics of high energy resolution over a wide dynamic range in energy ,reasonable position resolution and large solid‐angle coverage . It also can detect multiple particles simultaneously .In this work ,a detailed simulation of the detector module was performed based on Geant4 .With the simulation and the experimental tests of each part of the detector module ,the design construction and a whole predicting performance of the detector module were given .