Development of a multi-channel readout ASIC for a fast neutron spectrometer based on GEM-TPC

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HE Li, DENG Zhi, LIU Yi-Nong and LI Yu-Lan. Development of a multi-channel readout ASIC for a fast neutron spectrometer based on GEM-TPC[J]. Chinese Physics C, 2014, 38(10): 106101. doi: 10.1088/1674-1137/38/10/106101
HE Li, DENG Zhi, LIU Yi-Nong and LI Yu-Lan. Development of a multi-channel readout ASIC for a fast neutron spectrometer based on GEM-TPC[J]. Chinese Physics C, 2014, 38(10): 106101.  doi: 10.1088/1674-1137/38/10/106101 shu
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Received: 2013-11-05
Revised: 2014-02-25
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Development of a multi-channel readout ASIC for a fast neutron spectrometer based on GEM-TPC

    Corresponding author: HE Li,
    Corresponding author: DENG Zhi,

Abstract: A multi-channel front-end ASIC has been developed for a fast neutron spectrometer based on Gas Electron Multiplier (GEM)-Time Projection Chamber (TPC). Charge Amplifier and Shaping Amplifier for GEM (CASAGEM) integrates 16+1 channels: 16 channels for anodes and 1 channel for cathode. The gain and the shaping time are adjustable from 2 to 40 mV/fC and from 20 to 80 ns, respectively. The prototype ASIC is fabricated in 0.35 μ CMOS process. An evaluation Print Circuit Board (PCB) was also developed for chip tests. In total 20 chips have been tested. The integrated nonlinearity is less than 1%. The equivalent noise electrons is less than 2000e when the input capacitor is 50 pF. The time jitter is less than 1 ns. The design and the test results are presented in the paper.

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