Digital anti-compliant HPGe spectrometer system based on alpha particle event readout
An alpha particle and digital technology, applied in the field of digital anti-coincidence HPGe spectrometer system, can solve the problems of inability to completely restore the original energy spectrum and anti-coincidence energy spectrum of alpha particles, inability to achieve coincidence time positioning, and inability to accurately know the occurrence time, etc. To achieve the effect of complete collection and measurement
Active Publication Date: 2019-06-04
CHENGDU UNIVERSITY OF TECHNOLOGY
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[0005]The traditional spectrometer system based on hardware anti-coincidence measurement can only realize coincidence / anti-coincidence gating signal triggering, realize single energy spectrum acquisition, and cannot accurately know each coincidence The occurrence time of the event cannot completely record the coincident event occurrence process, cannot realize the coincident time positioning, cannot completely restore the original energy spectrum and anti-coincidence energy spectrum of the α particle, and cannot realize multi-mode reproduction under off-line conditions
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[0044]In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and examples.
[0045] like figure 1 As shown, a digital anti-coincidence HPGe spectrometer system based on α particle event readout can support 7 anti-coincidence\coincidence detector signal inputs and 1 HPGe detector signal input. The system includes: 7 digital Time-to-digital conversion (TDC) measurement module, single-channel high-resolution HPGe spectrometer board, multi-channel clock synchronizer, multi-channel particle data transmission controller, main control and Ethernet communicator, multiple high-voltage and low-voltage power supplies, and PC PC. The design of each main functional module of the system is described now.
[0046] (1) Digital anti-coincidence discriminator
[0047] The digital anti-coincidence discriminator can measure the time information...
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The invention discloses a digital anti-compliant HPGe spectrometer system based on alpha particle event readout. The system comprises a digital anti-compliance discriminator, an HPGe spectrometer board card, a data transmission and control system, a PC host computer and multiple high and low voltage power supplies. The digital anti-compliance discriminator can measure the time information of an input signal. The HPGe spectrometer board card realizes the extraction of the particle event information of an HPGe detector. The data transmission and control system is used to process the particle time information measured by the digital anti-compliance discriminator and the particle information measured by the HPGe spectrometer board card. The PC host computer receives a particle event data packet sent by the data transmission and control system, and analyzes the data packet. Multiple high and low voltage power supplies are used for power supply. The system provided by the invention overcomesthe shortcoming of single energy spectrum acquisition, realizes digital triggering of a compliance / anti-compliance signal through the digital anti-compliance discriminator, can accurately set compliance measurement time, can realize complex nuclear radiation measurement, and completely restores an anti-compliance measurement process.
Description
technical field [0001] The invention relates to the technical field of alpha particle measurement, in particular to a digital anticoincidence HPGe spectrometer system based on alpha particle event readout. Background technique [0002] At present, alpha spectrometers have been widely used in radiation protection, national defense, commodity inspection, food hygiene, agricultural science, geological exploration and other fields. Therefore, how to measure alpha particles efficiently and accurately has become a hot spot of current research. Because some radionuclides emit γ-rays when they undergo α-decay, while some radionuclides do not emit γ-rays. If the energy of α-particles produced by the two α-decays is close, it is impossible to simply measure the energy of α-particles. Different radionuclides can be effectively screened. Therefore, by synchronously measuring the gamma rays released by alpha decay and their energy spectrum, two radionuclides can be accurately determined,...
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IPC IPC(8): G01T1/36
Inventor 胡传皓曾国强杨小峰何黎严磊白彬侯杨卿松
Owner CHENGDU UNIVERSITY OF TECHNOLOGY