A Compact Spectrometer for Heavy Ion Experiments in the Fermi energy regime

• Published in: Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2021-09, Vol.1011, p.165592, Article 165592
• Main Authors: Guan, Fenhai, Diao, Xinyue, Wang, Yijie, Qin, Yuhao, Qin, Zhi, Wu, Qianghua, Guo, Dong, Wei, Xianglun, Yang, Herun, Ma, Peng, Hu, Rongjiang, Duan, Limin, Liu, Wenbo, Su, Wanqing, Ma, Chun-Wang, Hou, Yikai, Xiao, Zhigang
• Format: Article
• Language: English
• Subjects: CSHINE; Fission fragments; Light charged particles; Particle identification; PPACs; Si-Si-CsI telescopes
• ISSN: 0168-9002; 1872-9576
• DOI: 10.1016/j.nima.2021.165592

A Compact Spectrometer for Heavy IoN Experiments (CSHINE) has been recently built for the studies of heavy ion reactions at intermediate energies. CSHINE consists of a Si-Si-CsI telescope array and a parallel plate avalanche counter (PPAC) array. Each telescope consists of a thin single-sided silicon strip detector and a thick double-sided silicon strip detector backed by a 3 × 3 CsI(Tl) crystal hodoscope. The thicknesses of the silicon detectors are optimized in order to identify various types of light charged particles in a wide energy range. PPAC is a large-area two-dimensional position-sensitive gas detector, which records fission fragments with the intrinsic efficiency of approximately 100% but filters out light charged particles at properly selected working conditions. In the phase-II run, four Si-Si-CsI telescopes and three PPACs have been installed and operated in the beam experiment with 25 MeV/u Kr+Pb reactions. Particle identification for isotopes from Hydrogen to Boron has been achieved with the Si-Si-CsI telescopes, while excellent timing and position resolution have been achieved with the PPACs.