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 ›› 2016, Vol. 27 ›› Issue (5): 119 doi: 10.1007/s41365-016-0124-4


A QTC-based signal readout for position-sensitive multi-output detectors

Wei Zhou 1,2,3  ,Zhi-Ming Zhang 1,2 , Dao-Wu Li 1,2 , Pei-Lin Wang 1,2 ,  Bao-Tong Feng 1,2 , Xian-Chao Huang 1,2 , Ting-Ting Hu 1,2 , Xiao-Hui Li 1,2 , Yan Chen 1,2 , Ying-Jie Wang 1,2 , Yan-Tao Liu 1,2 , Yi-Wen Zhang 1,2 , Shi-Feng Sun 1,2,3 , Xiao-Yue Gu 1,2,3 , Ming-Jie Yang 1,2,3 , Xiong Xiao 1,2,3 , Long Wei 1,2   

  1. 1 Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
    2 Beijing Engineering Research Center of Radiographic Techniques and Equipment, Beijing 100049, China
    3 University of Chinese Academy of Sciences, Beijing 100049, China 123
  • Contact: Long Wei
  • Supported by:

    This work was supported by the National Key Scientific Instrument and Equipment Development Project (No. 2011YQ120096), National Instrumentation Program (No. 2013YQ030629) and the National Natural Science Foundation of China (Nos. 11475206, 11175200 and 11205170).

PDF ShareIt Export Citation
Wei Zhou, Zhi-Ming Zhang, Dao-Wu Li, Pei-Lin Wang, Bao-Tong Feng, Xian-Chao Huang, Ting-Ting Hu, Xiao-Hui Li, Yan Chen, Ying-Jie Wang, Yan-Tao Liu, Yi-Wen Zhang, Shi-Feng Sun, Xiao-Yue Gu, Ming-Jie Yang, Xiong Xiao, Long Wei. A QTC-based signal readout for position-sensitive multi-output detectors.Nuclear Science and Techniques, 2016, 27(5): 119     doi: 10.1007/s41365-016-0124-4


A new signal readout method for position-sensitive multi-output detectors, such as those in high-energy spectroscopy measurement and nuclear imaging, was developed by combining the charge division circuit, summing circuit and charge-to-time conversion (QTC) circuit. The 64 outputs of a Hamamatsu H8500 position-sensitive photomultiplier tube were processed, and three digital pulses were generated. The widths of digital pulses were determined using the time-to-digital converter in an field programmable gate array. The energy and position information of incident c-rays is estimated based on the proportionality between the width of digital pulses and input charge created by c-photons. A prototype was built using discrete components and tested, and the energy and position resolutions were improved compared with that obtained with standard ADCs. This method greatly simplifies the front-end electronics and the digital interface. It enables a compact electronics system and an easy integration into an ASIC.

Key words: Signal readout, Charge-to-time conversion, Time-to-digital converter, H8500 PSPMT