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

The two dimensional sensitive detector based on 10B film is a newly developed thermal neutron detector with the advantages of large sensitive area, good time and position resolution, high n/ 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 arriving signals on both sides of delay-line, the original position can be well recovered. By applying a hardwire filter in FPGA, the data 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.