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Digital coincidence multi-channel system for nuclear spectroscopy and nuclear electronics

A technology of nuclear electronics and channel systems, applied in the field of signal processing, to achieve the effect of avoiding delay time and matching resolution time setting, simplifying debugging and use process, and simplifying composition

Active Publication Date: 2012-09-12
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to solve the above-mentioned problems existing in the existing analog multi-parameter multi-channel system

Method used

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  • Digital coincidence multi-channel system for nuclear spectroscopy and nuclear electronics
  • Digital coincidence multi-channel system for nuclear spectroscopy and nuclear electronics
  • Digital coincidence multi-channel system for nuclear spectroscopy and nuclear electronics

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Embodiment Construction

[0022] This embodiment provides a three-channel digital coincidence multi-channel system for nuclear spectroscopy and nuclear electronics.

[0023] as attached figure 2 and 3 As shown, after a nuclear radiation event occurs, the signal is amplified by the preamplifier and the main amplifier, and collected by the high-speed high-resolution sampling ADC. After the pulse signal waveform is collected, the amplitude and arrival time of the pulse signal are obtained by real-time processing with CPLD and DSP. The same clock source is used between multiple channels to ensure the clock synchronization of the sampling ADC. The amplitude and arrival time information of each pulse signal of each channel is saved to the computer via the first-in-first-out memory FIFO and PCI bus. When the measurement is over, read out the pulse amplitude and arrival time of each pulse of each channel from the data file saved by the computer, and then manually input or select the delay time and coincidenc...

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Abstract

The invention belongs to the field of signal processing technology and particularly relates to a digital coincidence multi-channel system for nuclear spectroscopy and nuclear electronics. In the system, an ADC is used to sample, a pulse signal waveform acquired by each channel is processed by a signal processor in real time to obtain the amplitude and arrival time of the pulse signal and store the amplitude and the arrival time in the computer; and after measurement, the amplitude and the arrival time of each pulse signal of each channel are read from the data stored in the computer, parameters of a delay time and a coincidence resolving time are selected according to a delay time spectral line, a computer ware is used to select coincidence pulse signals within the coincidence resolving time between a plurality of channels, and thus, a multi-parameter nuclear spectrum is formed. The digital coincidence multi-channel system provided by the invention has the advantages of simple structure, low cost, high signal acquiring and processing efficiency and the like.

Description

technical field [0001] The invention belongs to the technical field of signal processing, and in particular relates to a digital coinciding multi-channel system for nuclear spectroscopy and nuclear electronics. Background technique [0002] In nuclear spectroscopy measurement, a multi-parameter (multi-channel) multi-channel analyzer is a nuclear electronics unit that records and analyzes various types of nuclear radiation information. Each nuclear radiation event corresponds to multiple measurement parameters, and each parameter corresponds to a measurement channel, so the parameters of the same event need to be recorded simultaneously and combined into one event data. The traditional analog multi-parameter uses the coincidence of multi-channel signals to judge and record an event data, so this kind of multi-parameter multi-channel needs to be equipped with analog coincident circuits, such as figure 1 shown. The analog coincidence circuit judges whether multiple pulse sign...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01T1/36G01T3/00
Inventor 袁大庆
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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