Forming time adaptive digital pulse filtering method and device and electronic equipment

Abstract

The invention discloses a digital pulse filtering method and device with self-adaptive forming time and electronic equipment, and relates to the technical field of nuclear radiation detection. The method comprises the following steps: acquiring rise time of an actual input signal; determining a time interval of adjacent incident pulses based on the rise time; on the basis of the time interval, the peak reaching time of the trapezoidal shaping filter which is randomly distributed according to the input pulse interval is independently determined for each detected X-ray signal, so that the higher pulse counting rate is realized; and based on the rise time, separately confirming the flat-top time of the trapezoidal shaping filter for each detected X-ray pulse signal, so as to compensate for the ballistic loss effect based on the flat-top time. The method is adaptive to the flattop time of the trapezoidal filter, and the flattop time of each detected X-ray is independently selected, so that higher energy resolution is realized.

Description

technical field [0001] The invention relates to the technical field of nuclear radiation detection, in particular to a shaping time adaptive digital pulse filtering method, device and electronic equipment. Background technique [0002] Nuclear radiation is ray particles emitted by a radioactive source, and the ray is incident on the detector to generate a pulse current signal. The preamplifier converts the pulse current signal into a voltage signal, and then the digital pulse processing system obtains information such as energy, time, and position. The goal of the digital pulse processing system is to accurately extract the pulse signal amplitude caused by the incident ray particles to achieve the best signal-to-noise ratio and high energy resolution. The pulse processing system is mainly composed of sub-modules such as filter shaping, accumulation suppression, baseline elimination and amplitude extraction. Among them, filter shaping is the most critical module. Its functio...

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Problems solved by technology

[0008] The object of the present invention is to provide a digital pulse filtering method, device and electronic equipment with adaptive shaping time, which is used to solve the problem that if the selected shaping time is small, although the pulse counting rate is improved, it will cause energy resolution problems. Deterioration, if the selected shaping time is large, it will aggravate pulse accumulation and baseline drift. When pulses accumulate, they can only discard or only take the first pulse peak value, which will cause the effective pulse passing rate to be much lower than the actual input pulse number. In order to obtain good energy resolution, the pulse count rate is sacrificed, which affects the detection efficiency of the instrument

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