A Gaussian integer-free digital multi-channel pulse analyzer for a spectrometer

A multi-channel pulse and analyzer technology, applied in the field of analyzers, can solve problems such as the increase of baseline noise amplitude, and achieve the effects of short rising edge time, simplified pulse height, and simplified algorithm

Active Publication Date: 2017-02-15
SHENZHEN UNIQUE METRICAL TECH
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Problems solved by technology

The pulse signal output by the preamplifier has a steep rising edge, and the rising edge of a typical gas detector can reach less than 300ns, but after the shaping circuit, the pulse width is generally 1 to several microseconds, and the noise amplitude of the baseline is significantly improved

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  • A Gaussian integer-free digital multi-channel pulse analyzer for a spectrometer
  • A Gaussian integer-free digital multi-channel pulse analyzer for a spectrometer
  • A Gaussian integer-free digital multi-channel pulse analyzer for a spectrometer

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with specific examples, but the present invention is not limited to the following examples.

[0020] Such as figure 1 As shown, the multi-channel pulse processor: the full name of the multi-channel pulse amplitude analyzer (MCA), the function is to divide the amplitude of the AD sampling range into 1024, 2048, 4096 channels, and each channel records the number of pulse amplitudes, such as The AD acquisition signal range is -0.3V to 3V, 2048 channels, and the corresponding amplitude of each channel is 3.3 / 2048=1.6mV. When a signal with a pulse amplitude of 1V is collected, add 1 to the 1000mV / 1.6mV channel count, and add 1 to the 2048 channel count when it is 3.3V, such as figure 1 As shown, the x-axis is the channel value, and the y-axis is the count rate.

[0021] A non-Gaussian digital multi-channel pulse analyzer of a spectrometer, which directly samples the preamplifier signal (charge sensitive a...

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Abstract

The invention discloses a non-gaussian integer digital multi-channel pulse analyzer of a spectrograph. A pre-amplified signal is directly sampled and subjected to amplitude analysis. Due to the fact that the pre-amplified signal is used as a sampled signal, the rising edge is fast and less than 300ns in general; a falling edge is slow and not greater than 20mus in general; the overlapping opportunity of peak positions of the rising edge is fewer under the condition of high counting rate; the lowest point and the highest point of the rising edge are tracked in novel multi-channel pulse analysis, and the difference value between the highest point and the lowest point is a multi-channel value correspondingly. Compared with the previous analysis method, the effect of baseline noise on the peak position is small; the method for judging peaks adopts continuous signal amplitude rising for three times; a peak is determined when the value is greater than a fixed value, and either noise or a real peak can be easily distinguished.

Description

technical field [0001] The invention belongs to an analyzer technology of a spectrometer, in particular to a digital multi-channel pulse analyzer without Gaussian integer of the spectrometer. Background technique [0002] The multi-channel pulse amplitude analyzer can not only automatically acquire energy spectrum data, but also obtain the entire energy spectrum in one measurement, so the data acquisition time can be greatly reduced, and at the same time, the measurement accuracy is also significantly improved. Since the 1950s, multi-channel pulse amplitude analyzers have developed rapidly and are now common instruments for acquiring nuclear spectroscopy data. [0003] The multi-channel analysis task is to divide the measured pulse amplitude range into 2n amplitude intervals, then measure the number of input pulses whose amplitude is in each amplitude interval, and finally obtain the pulse amplitude distribution curve of the input signal. Its measurement adopts A / D analog-t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J3/02
Inventor 王荣
Owner SHENZHEN UNIQUE METRICAL TECH
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