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 (8): 121 doi: 10.1007/s41365-019-0647-6


Design and Off-line Processing of an ultra-fast digitizer based on Internal Cascaded DRS4

Ya-Fei Du1, 2,  Jun Wu2 , Chen Yuan2 , Bo Yang2 , Cen-Ming Ye2 , Chuan-Fei Zhang2, Yi-Nong Liu1   

  1. 1 Department of Engineering Physics, Tsinghua University, Beijing 100084, China
    2 Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621999, China
  • Received:2019-01-02 Revised:2019-04-04 Accepted:2019-04-11
  • Contact: Ya-Fei Du
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Ya-Fei Du, Jun Wu, Chen Yuan , Bo Yang , Cen-Ming Ye , Chuan-Fei Zhang, Yi-Nong Liu. Design and Off-line Processing of an ultra-fast digitizer based on Internal Cascaded DRS4.Nuclear Science and Techniques, 2019, 30(8): 121     doi: 10.1007/s41365-019-0647-6

Abstract: In this paper, we present an ultrafast digitizer utilizing the DRS4 switched capacitor array applicationspecific integrated circuit to achieve an ultrafast sampling speed of at most 5 GS/s. We cascaded all eight channels (sub-channels) of a single DRS4 chip for increased storage depth. The digitizer contains four DRS4 chips, a quadchannel analog-to-digital converter, a controlling fieldprogrammable gate array, a PXI interface, and an SFP? connector. Consequently, each DRS4 channel has a depth of 8192 points and a vertical resolution of 14 bits. The readout sequences should be broken into several segments and then reordered to obtain the correct sequential data sets, and this offline procedure varies in different readout modes. This paper describes the design and implementation of the hardware; in particular, the respective processing procedures are described in detail. Furthermore, the offset error is calibrated and corrected to improve the precision of the captured waveform in both single-channel and highresolution modes.

Key words: Ultrafast, Digitizer, DRS4, Cascade, Readout