Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2019, Vol. 30 ›› Issue (10): 152 doi: 10.1007/s41365-019-0676-1


Electrostatic-lenses position-sensitive TOF MCP detector for beam diagnostics and a new scheme of mass measurements at HIAF

Jun-Hao Liu,1, 2 Zhuang Ge,1, 2 Qian Wang,1, 2 Geng Wang,1, 2 Li-Na Sheng,1, 2 Wen-Wen Ge,1, 2 Xing Xu,1, 2 Peng Shuai,1, 2 Qi Zeng,3  Bo Wu1, 2   

  1. 1University of Chinese Academy of Sciences, Beijing 100049, China
    2Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
    3School of Nuclear Science and Engineering, East China University of Technology, Nanchang 330013, China
  • Received:2019-03-04 Revised:2019-05-21 Accepted:2019-05-23
  • Contact: Zhuang Ge
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Jun-Hao Liu, Zhuang Ge, Qian Wang, Geng Wang, Li-Na Sheng, Wen-Wen Ge, Xing Xu, Peng Shuai, Qi Zeng, Bo Wu. Electrostatic-lenses position-sensitive TOF MCP detector for beam diagnostics and a new scheme of mass measurements at HIAF.Nuclear Science and Techniques, 2019, 30(10): 152     doi: 10.1007/s41365-019-0676-1

Abstract: A foil–microchannel plate (MCP) detector, which uses electrostatic lenses and possesses both good position and timing resolutions, has been designed and simulated for beam diagnostics and mass measurements at the next-generation heavy-ion-beam facility HIAF in China. Characterized by low energy loss and good performances of timing and position measurements, it would be located at focal planes in fragment separator HFRS for position monitoring, beam turning, Br measurement, and trajectory reconstruction. Moreover, it will benefit the building-up of a magnetic-rigidity–energy-loss–time-of-flight (Br–DE–TOF) method at HFRS for high-precision in-flight particle identification (PID) of radioactive isotope (RI) beams on an event-by-event basis. Most importantly, the detector can be utilized for in-ring TOF and position measurements, beam-line TOF measurements at two achromatic foci, and position measurements at a dispersive focus of HFRS, thus making it possible to use two complementary mass measurement methods (isochronous mass spectrometry (IMS) at the storage ring SRing and magnetic-rigidity–time-of-flight (Br-TOF) at the beam-line HFRS) in one single experimental run.

Key words: Microchannel plate, Electrostatic lenses, Detector, Position-sensitive, Time-of-flight, Mass measurements, HIAF