A prompt pulse hard X-ray detection system with spatial background suppression function

Abstract

The present invention discloses a prompt pulse hard X-ray detection system with a space background suppression function, which relates to the field of space radiation detection technology and includes a detection module, a data aggregation and synchronization module, and a terminal data processing and display module connected in sequence. The detection module is used to detect background interference signals and effective signals of X-rays, upload pulse width statistical data or perform effective signal screening according to the working mode, eliminate interference signals and output preliminary compliance signals; the data aggregation and synchronization module is used to aggregate data from multiple detection modules, perform corresponding work according to the working mode, obtain data aggregated by multiple detection modules, and provide a synchronization signal; the terminal data processing and display module receives data aggregated by multiple detection modules and displays corresponding data. The present invention helps to effectively identify back-pulsed hard X-ray signals within a certain energy range generated by bremsstrahlung in a high radiation background environment in space.

Description

Technical Field

[0001] The present invention relates to the technical field of space radiation detection, and in particular to a prompt pulse hard X-ray detection system with a space background suppression function. Background Art

[0002] Compared with soft X-ray measurement technology, space hard X-ray measurement technology has developed relatively slowly. In current scientific research, as a key detection method, it is widely used in the fields of space exploration and astrophysics research. However, traditional hard X-ray measurement systems cannot detect low-intensity pulsed hard X-rays (50-300keV, with an intensity of about 10 6 ~10 8 / s, the background radiation energy in space is above several MeV, and the intensity is about 10 5 / s) measurement, there are still great challenges in background interference processing and system design. At present, hard X-ray measurements are relatively common in the field of space astronomy, but the intensity is extremely low, generally one every few seconds, and medium and high energy telescopes are often used to detect using CZT or Si-PIN array detectors, but accurate energy, time and intensity information cannot be obtained at the same time. The energy spectrum method, counting method, imaging method commonly used in radiation detection and the pixel array method, anti-coincidence discrimination method, coded hole imaging method and its focused imaging method commonly used in space X-ray measurement cannot solve the technical problems of detecting small hard X-ray signals in strong interference signals and triggering suppression of interference signals under high counting rates. The existing measurement methods and systems cannot meet the measurement needs of low-intensity pulsed hard X-rays within a specific energy range generated under certain special conditions in space. Therefore, a prompt pulse hard X-ray detection system with a space background suppression function is proposed to solve the problem of low-intensity pulsed hard X-ray measurement in space that cannot be solved by existing technologies. This is a problem that technical personnel in this field urgently need to solve. Summary of the Invention

[0003] In view of this, the present invention provides a prompt pulse hard X-ray detection system with a spatial background suppression function, which can effectively identify low-intensity pulse hard X-ray signals within a specific energy range.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A prompt pulse hard X-ray detection system with a spatial background suppression function comprises a detection module, a data aggregation and synchronization module, and a terminal data processing and display module connected in sequence;

[0006] The detection module is used to detect the background interference signal and effective signal of X-rays, upload the pulse width statistical data or screen the effective signal according to the working mode, eliminate the interference signal and output the preliminary compliance signal;

[0007] The data aggregation and synchronization module includes a data aggregation unit and a synchronization signal distribution unit, which is used to aggregate the data of multiple detection modules, perform corresponding work according to the working mode, obtain the aggregated data of multiple detection modules, and provide a synchronization signal;

[0008] The terminal data processing and display module receives the data aggregated by multiple detection modules and displays the corresponding data according to the working mode.

[0009] In the above system, optionally, the detection module includes a plurality of array detectors and a plurality of multi-channel readout electronic circuits, each array detector is individually connected to a multi-channel readout electronic circuit to form a subunit, and the plurality of subunits are connected in parallel.

[0010] In the above system, optionally, the array detector includes a plurality of array detector modules for expanding the array scale and improving the detection efficiency.

[0011] Optionally, the above system has working modes including acquisition mode and background mode.

[0012] In the above system, optionally, the multi-channel readout electronics circuit includes a front-end analog circuit and a time-to-digital conversion circuit connected in sequence.

[0013] The front-end analog circuit is used to amplify the detector output signal and output the over-threshold discrimination, converting the detector output signal into a digital signal with time information;

[0014] The time digital conversion circuit performs high-precision time stamping and pulse width measurement. In the coincidence acquisition mode, the card pulse width window and time window are used to perform energy coincidence and time coincidence to select the valid signal; in the background mode, the pulse width of the over-threshold signal is measured.

[0015] In the above system, optionally, the time coincidence mode includes timestamp coincidence and pulse width coincidence; the time coincidence input objects are the multi-channel output of a single detector array and the outputs of multiple detection modules.

[0016] It can be seen from the above technical solutions that, compared with the prior art, the present invention provides a prompt pulse hard X-ray detection system with a spatial background suppression function, which has the following beneficial effects: 1) The present invention performs excellently in signal identification, background noise suppression and reduction of invalid data transmission, and can provide more accurate data for the detection of back-directed low-intensity pulsed hard X-rays within a certain energy range generated under a special situation in space, providing important support for scientific research and technological applications in related fields; 2) The present invention expands the detection area and reduces mutual cross-interference through the combination of multiple sets of array detectors, and the scale can be adjusted according to needs; 3) The present invention uses timestamps and pulse widths to perform multiple coincidences to eliminate spatial interference signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0018] Figure 1 This is a block diagram of a prompt pulse hard X-ray detection system with spatial background suppression function disclosed in the present invention;

[0019] Figure 2 This is a block diagram of the multi-channel readout electronics system disclosed in the present invention;

[0020] Figure 3 This is a schematic diagram of the design of the spatial background interference suppression disclosed in the present invention;

[0021] Figure 4 This is a schematic diagram of the composition structure of the data aggregation and synchronization unit disclosed in the present invention. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] In this application, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. The terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or apparatus comprising the element.

[0024] Reference Figure 1 As shown, the present invention discloses a prompt pulse hard X-ray detection system with a spatial background suppression function, comprising a detection module, a data aggregation and synchronization module, and a terminal data processing and display module connected in sequence;

[0025] The detection module is used to detect the background interference signal and effective signal of X-ray, upload the pulse width statistics or perform effective signal screening according to the working mode, eliminate the interference signal and output the preliminary compliance signal

[0026] The data aggregation and synchronization module includes a data aggregation unit and a synchronization signal distribution unit, which is used to aggregate the data of multiple detection modules, perform corresponding work according to the working mode, obtain the aggregated data of multiple detection modules, and provide a synchronization signal.

[0027] The terminal data processing and display module receives the data aggregated by multiple detection modules and displays the corresponding data according to the working mode.

[0028] Specifically, the detection module uses small-sized detector units to form an array detector, which has high spatial resolution and can separate interference signals from effective signals. The signals are output at different detector units of the array detector. Small-sized semiconductor detectors are combined to form an array detector, or small-sized scintillation detectors are combined to form an array detector module.

[0029] Furthermore, in the data aggregation and synchronization module, the data aggregation unit aggregates and interprets the data output by multiple array detectors and their multi-channel readout electronics modules, and performs compliance screening or pulse width statistical test energy spectrum on the data under the corresponding function according to the acquisition mode;

[0030] The main function of the synchronization signal distribution unit is to provide synchronization trigger signals and synchronization clock signals to each multi-channel readout electronic circuit in order to obtain accurate time measurement data.

[0031] Furthermore, the detection module includes a plurality of array detectors and a plurality of multi-channel readout electronic circuits, each array detector is individually connected to a multi-channel readout electronic circuit to form a subunit, and the plurality of subunits are connected in parallel.

[0032] Specifically, combining multiple detector arrays increases the detector area, thereby improving detection efficiency and the signal-to-noise ratio of the output signal, thereby enhancing measurement accuracy. Theoretically, a larger detector array area results in higher detection efficiency. However, due to limitations such as detector unit layout and wiring, multi-channel readout electronics design, and output signal-to-noise ratio requirements, it is difficult to scale a single detector array very large. The present invention expands the detection system scale by combining multiple arrays, allowing for adjustments based on needs.

[0033] Furthermore, the system is composed of multiple array detector modules (1# to n#) and their corresponding readout electronic circuits (1# to n#), which are used to identify single-particle signals, screen effective signals, and eliminate spatial interference.

[0034] Specifically, the array detector first performs energy screening. There is a certain positive correlation between energy and pulse width, and those that are not within the effective signal energy window (50-300 keV) are eliminated.

[0035] Furthermore, the working mode includes an acquisition mode and a background mode.

[0036] Further, refer to Figure 2 and Figure 3 As shown, the multi-channel readout electronics circuit includes a front-end analog circuit and a time-to-digital conversion circuit connected in sequence;

[0037] The front-end analog circuit is used to amplify the detector output signal and output the over-threshold discrimination, converting the detector output signal into a digital signal with time information;

[0038] The time digital conversion circuit measures the timestamp and pulse width with high precision, and uses the card pulse width window and time window to perform energy coincidence and time coincidence.

[0039] Further, refer to Figure 4 As shown, the preliminary coincidence of the detection module is performed inside the multi-channel readout electronic circuit, and the card time window and the card pulse width window are used to perform time coincidence between multiple channels of the array detection module.

[0040] The data aggregation synchronization module uses the card time window and pulse width window to perform a second match, that is, match between multiple systems.

[0041] Furthermore, the time coincidence mode includes time stamp coincidence and pulse width coincidence; the time coincidence input objects are the multi-channel output of a single detector array and the output of multiple systems.

[0042] Each embodiment in this specification is described in a progressive manner. The same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments. In particular, for system or system embodiments, since they are basically similar to method embodiments, the description is relatively simple. For relevant parts, refer to the partial description of the method embodiment. The system and system embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. A person of ordinary skill in the art can understand and implement it without expending creative work.

[0043] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A prompt pulse hard X-ray detection system with spatial background suppression function, characterized in that: It includes a detection module, a data aggregation and synchronization module and a terminal data processing and display module connected in sequence; The detection module is used to detect the background interference signal and effective signal of X-rays, upload the pulse width statistical data or screen the effective signal according to the working mode, eliminate the interference signal and output the preliminary compliance signal; The data aggregation and synchronization module includes a data aggregation unit and a synchronization signal distribution unit, which is used to aggregate the data of multiple detection modules, perform corresponding work according to the working mode, obtain the aggregated data of multiple detection modules, and provide a synchronization signal; The terminal data processing and display module receives the data aggregated by multiple detection modules and displays the corresponding data according to the working mode; The detection module includes multiple array detectors and multiple multi-channel readout electronic circuits, each array detector is individually connected to a multi-channel readout electronic circuit to form a sub-unit, and multiple sub-units are connected in parallel; The working modes include acquisition mode and background mode; The multi-channel readout electronics circuit includes a front-end analog circuit and a time-to-digital conversion circuit connected in sequence; The front-end analog circuit is used to amplify the detector output signal and output the over-threshold discrimination, converting the detector output signal into a digital signal with time information; The time digital conversion circuit performs high-precision time stamping and pulse width measurement. In the coincidence acquisition mode, the pulse width window and time window are used to perform energy coincidence and time coincidence to select the valid signal; in the background mode, the pulse width of the over-threshold signal is measured; Time coincidence modes include timestamp coincidence and pulse width coincidence; the time coincidence input objects are the multi-channel outputs of a single detector array and the outputs of multiple detection modules.

2. The prompt pulse hard X-ray detection system with spatial background suppression function according to claim 1, characterized in that: The array detector includes multiple detector modules, which are used to identify single particle signals and improve detection efficiency.

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