Raw datasets of the response of 10B-doped MCP to neutrons from eV to MeV

B-MCP with 10 mol% 10B was tested for its response to wide-energy neutrons from eV to MeV at the Back-n white neutron source at the China Spallation Neutron Source. The experiment used the common electronics and data acquisition systems of the Back-n facility. The output signals of the preamplifier were digitized by the readout electronics system with a 12 bit folding-ADC and a 1 GHz sampling rate. The system was triggered by the T0 signal from the proton beam monitor, and the threshold was set to 14.6 mV to filter the electronic noise. The sampling duration was set from 2 μs before the T0 trigger to 8 μ s after the T0 trigger, and the waveform of each neutron event was recorded. Because it is difficult for MCPs to distinguish between dark counts and neutron events, the B-MCP uses a voltage of -1750 V to keepthe dark counts below 0.1 cps/cm2. Each measurement took 10800 s to obtain accurate statistics. The data analysis was performed using the ROOT program developed by CERN.

本研究在中国散裂中子源的Back-n白中子源上，对掺10摩尔%硼-10的B-MCP开展了宽能区中子响应测试，测试覆盖从电子伏特（eV）到兆电子伏特（MeV）的中子能段。实验采用Back-n装置的通用电子学与数据获取系统。前置放大器的输出信号通过搭载12位折叠模数转换器（folding-ADC）与1 GHz采样率的读出电子学系统完成数字化。该系统由质子束流监测器输出的T0信号触发，并将阈值设置为14.6 mV以滤除电子学噪声。采样时长设置为T0触发前2微秒至T0触发后8微秒，并记录每个中子事件的波形。由于微通道板（Microchannel Plate, MCP）难以区分暗计数与中子事件，该B-MCP采用-1750 V的工作电压，将暗计数压制至0.1 cps/cm²以下。单次测量时长为10800秒，以获取足够精确的统计数据。数据分析采用欧洲核子研究中心（CERN）开发的ROOT程序完成。