Readout of the time signals of the MWPC detector with boron sensitive thermal neutron

摘要

The two dimensional sensitive detector based on 1 0 B film is a newly developed thermal neutron detector with the advantages of large sensitive area,good time and position resolution,high n/γ inhibition ability,strong ability of anti-radiation, two-dimensional readout and good resistance to the count rate capability.So it is important to carry out the study of the readout method of the two-dimensional position sensitive neutron detector based on the B neutron transfer layer and MWPC structure.In this paper,a readout board based on delay-line readout method is presented.By measuring the time difference between the arri-ving signals on both sides of delay-line,the original position can be well recovered.By applying a hardwire filter in FPGA,the da-ta rate needs to be transferred can be reduced remarkably.The RMS of the TDC is less than 50 ps.The integral nonlinearity is better than 1.1 LSB,the differential non-linearity is better than 0.5 LSB.The board achieves event rates of 1.3 MHz for periodic signals and the data can be transferred by Gbit ethernet daughter board simultaneously.

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