Nuclear Techniques ›› 2016, Vol. 39 ›› Issue (4): 40403-040403.doi: 10.11889/j.0253-3219.2016.hjs.39.040403


Development of a fan-in and delay module for MWDC based on Flash-ADC acquisition scheme

CHENG Wenjing, ZHANG Zhao, YI Han, LYU Liming, XIAO Zhigang   

  1. Department of Physics, Tsinghua University, Beijing 100084, China
  • Received:2016-01-18 Revised:2016-03-03 Online:2016-04-10 Published:2016-04-08
  • Supported by:

    Supported from the National Basic Research Program of China(973) Project(No.2014CB845405, No.2015CB856903), Natural Science Foundation of China(No.U1332207)


Background: Multi Wire Drift Chamber(MWDC) array is the tracking detector at Cooling storage ring External-target Experiment(CEE) under design at Heavy Ion Research Facility at Lanzhou-Cooling Storage Ring(HIRFL-CSR). The physical goal of CEE aims at the studies of the equation of state of nuclear matter at low temperature but high baryon density. The MWDC array needs a large amount of front end electronics followed by a scalable data acquisition system, which are all costly. Purpose: The aim is to design a readout scheme which can lower the cost but keep the performance of the array rarely degraded, and to test the system and demonstrate the feasibility of the design. Methods: Based on the Flash Analog-to-Digital Converter(ADC) acquisition scheme, a fan-in and delay module has been designed in order to record three signals from X, U and V sense wires simultaneously in each Flash-ADC channel. Results: By this means the total number of channels for MWDC is reduced by 60%. The performance of this fan-in and delay module is tested with a MWDC detector using 55Fe X-ray source. The amplitude signal and the timing signal are smeared by less than 1% and 500 ps, respectively. Conclusion: Both specifications show that the fan-in and delay module can be used in MWDC with the event rate ranging in 1-10kHz.

Key words: MWDC, Flash-ADC, Fan-in and delay, Time resolution, Energy resolution

CLC Number: 

  • O571.6