Improved nuclear signal trapezoidal pulse forming method and device

A trapezoidal pulse and improved technology, applied in the field of nuclear signal processing, can solve the problems of reduced energy resolution and ineffective trapezoidal shape, so as to solve the problem of signal accumulation, improve accuracy and energy resolution, and improve performance.

Inactive Publication Date: 2017-09-22
CHENGDU UNIVERSITY OF TECHNOLOGY +2
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  • Abstract
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Problems solved by technology

Since adjacent pulses cannot be resolved, trapezoidal shaping does not work and only overlapping pulses are discarded, resulting in reduced energy resolution

Method used

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  • Improved nuclear signal trapezoidal pulse forming method and device
  • Improved nuclear signal trapezoidal pulse forming method and device
  • Improved nuclear signal trapezoidal pulse forming method and device

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Embodiment Construction

[0038] In the following, the present invention will be further described in detail in conjunction with the accompanying drawings and embodiments, so as to make the purpose, technical solutions and advantages of the present invention more clear. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0039] A typical digital spectrometer system structure is as follows: Figure 5 As shown, it includes a detector, a digital pulse processor DPP, and a host computer; wherein, the DPP includes: an amplifier, an analog-to-digital converter ADC, an FPGA processing unit, and an interface unit.

[0040] The improved trapezoidal pulse shaping method disclosed in various embodiments of the present invention can be integrated in the above-mentioned digital pulse processor, and can also be applied in an independent device. For example, Figure 6 The shown improved trapezoidal pulse shaping d...

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Abstract

The present invention discloses an improved nuclear signal trapezoidal pulse forming method and device. With the improved nuclear signal trapezoidal pulse forming method and device of the invention adopted, a signal accumulation problem in nuclear signal trapezoidal pulse shaping can be solved, and the accuracy and energy resolution of energy spectrum measurement can be improved. The device comprises a delay unit, a first discrete filter, a second discrete filter, a gain unit and a differentiator; the delay unit is used for performing time delay processing on detector output signals according to a time delay factor to obtain time delay signals; the discrete filters are used for performing discrete filtering processing on the time delay signals according to a discrete filtering factor to obtain discrete filtering signals; the gain unit is used for performing gain compensation on the discrete filtering signals according to a gain factor to obtain compensation signals; and the differentiator is used for performing differential processing on the compensation signals according to a differential factor to obtain trapezoidal pulse signals.

Description

technical field [0001] The invention relates to the technical field of nuclear signal processing, in particular to an improved nuclear signal trapezoidal pulse shaping method and device. Background technique [0002] The energy spectrum measurement of rays includes measuring the distribution of counts with energy, which is an important aspect of nuclear radiation detection. Since measurements such as X-rays have high requirements for resolution, count rate and system stability, there are high requirements for digital processing of nuclear pulse signals. In the nuclear energy spectrum measurement system / detector, in order to reduce the influence of noise and ballistic loss on the energy spectrum measurement, the nuclear pulse signal needs to be filtered and shaped. [0003] The trapezoidal shape can reduce or eliminate the ballistic loss. When the width of the trapezoid flat top is greater than the maximum charge collection time of the detector, the ballistic loss can be avo...

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Application Information

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IPC IPC(8): G01T1/36
CPCG01T1/36
Inventor 吴军龙庹先国李怀良王小胡
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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