{'fraction_non_alphanumeric': 0.0192, 'fraction_numerical': 0.0064, 'mean_word_length': 5.255, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Design and performance evaluation of thermal neutron detector based on SiPM

As a traditional neutron detector, 3He proportional counter tube has the advantages of high thermal neutron detection sensitivity and good energy resolution. However, due to its high cost, difficult fabrication, and poor anti-interference ability, it is necessary to find better alternative products. In this paper, based on the principle of nuclear reaction neutron detection, a small thermal neutron detector is fabricated by coupling a silicon photomultiplier (SiPM) and a 6Li glass scintillator. The characteristics of its output signal are verified by experiments, and the influence of bias voltage and temperature on the output signal is studied. The experimental results show that the detection unit has a reasonable design and can effectively realize the detection of neutrons. The output signal pulse amplitude is -2.80V and the pulse width is 325ns, which meets the requirements of back-end acquisition. With the change of temperature and bias voltage, the noise amplitude of the output signal of the detection unit shows an opposite trend, which provides a solution for the problem of stable operation of the detection unit in different temperature environments.