Combined array YSO scintillation detector

Abstract

The invention discloses a combined array type YSO scintillation detector, and relates to the technical field of space radiation detection. Comprising a YSO detector array, a power supply adjusting circuit, a filter circuit, a test circuit, a load and an interface circuit thereof which are integrated on a PCB. According to the invention, the energy resolution and the energy measurement accuracy can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of space radiation detection, and in particular to a combined array type YSO scintillation detector. Background Art

[0002] In the field of space X-ray measurement, pixel array detectors (such as SDD, CDD, etc.) are commonly used to measure low-intensity pulsed soft X-rays (below 10 keV) based on imaging methods. However, for the measurement of space low-intensity pulsed hard X-rays with an energy range of 50 to 300 keV, the energy of the incident rays exceeds the energy measurement range of the pixel-type detector, and the detection efficiency is low, making it difficult to obtain accurate energy information.

[0003] Therefore, it is an urgent problem for technical personnel in this field to propose a combined array type YSO scintillation detector to solve the problem that the existing technology cannot meet the demand for single particle energy measurement of low-intensity pulsed hard X-rays generated under certain special conditions in space. Summary of the invention

[0004] In view of this, the present invention provides a combined array type YSO scintillation detector, which can improve the energy resolution and the accuracy of energy measurement.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A combined array type YSO scintillation detector comprises a YSO detector array, a power supply regulating circuit, a filtering circuit, a testing circuit, a load and an interface circuit thereof, which are integrated on a PCB board.

[0007] The above detector may optionally include a power supply regulating circuit for outputting a stable voltage to provide power for the integrated components on the PCB board, including a DC / DC module, a DAC chip, a single-chip microcomputer and its digital temperature sensor, and a regulating resistor.

[0008] The above detector, optionally, the filter circuit includes a power supply filter circuit and a signal filter circuit, which are used to provide a low-noise output signal;

[0009] The power supply filter circuit uses magnetic bead isolation and capacitor bypass filtering to filter noise; the signal filter circuit uses RC low-pass filter circuit.

[0010] For the above-mentioned detector, optionally, a power supply filter circuit, a YSO detector array and a signal filter circuit are connected in sequence.

[0011] The above-mentioned detector, optionally, the YSO detector array is composed of a plurality of YSO detection units combined at a certain interval, including a SiPM array and a YSO thin crystal positioned and coupled by optical glue, for measuring low-intensity single-particle signals.

[0012] The above-mentioned detector, the test circuit includes an SMA output connector and a jumper input interface, which is used to test the output signal of the detection unit in the YSO detector array and check the working status of the detection unit in the array.

[0013] It can be seen from the above technical solution that, compared with the prior art, the present invention provides a combined array type YSO scintillation detector, which has the following beneficial effects: 1) The signal extraction of the present invention does not cross, reduces the influence of mutual interference, and improves the signal-to-noise ratio; 2) The present invention integrates the YSO detector array, power supply regulation circuit, filter circuit, test circuit, load and its interface circuit on a PCB board, thereby achieving low noise and high signal-to-noise ratio output, so that the detector has a higher energy resolution and improves the accuracy of energy measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0015] Figure 1 It is a layout diagram of the array detector circuit board disclosed in the present invention;

[0016] Figure 2 It is a schematic diagram of the power supply regulation circuit disclosed in the present invention;

[0017] Figure 3 It is a schematic diagram of the primary voltage filtering isolation circuit disclosed in the present invention;

[0018] Figure 4 It is a schematic diagram of the secondary voltage protection filter circuit disclosed in the present invention;

[0019] Figure 5 This is a structural diagram of the YSO scintillation detector disclosed in the present invention;

[0020] Figure 6 It is a simulation result diagram of detection efficiency and photon collection efficiency disclosed in the present invention;

[0021] Figure 7 The micro-unit detector disclosed in the present invention is 241 Energy resolution test result diagram of Am. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0023] In this application, relational terms such as first and second, etc. are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "comprise one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0024] Reference Figure 1 As shown, the present invention discloses a combined array type YSO scintillation detector, including a YSO detector array, a power supply regulating circuit, a filtering circuit, a test circuit, a load and an interface circuit thereof integrated on a PCB board.

[0025] Specifically, the design of the combined array-type YSO scintillation detector is based on interdisciplinary knowledge such as pulse radiation detection technology and electronics low-noise design technology. The integrated method includes design technologies such as low noise control and high signal-to-noise ratio output. YSO crystals with high light output, short decay time, no self-radiation, relatively stable performance and thin thickness are selected to make their pulse output signal amplitude larger, the detection efficiency of high-energy space interference particles is lower, and it has a better signal-to-noise ratio, thereby improving the energy resolution.

[0026] Further, see Figure 2 As shown, the power regulation circuit is used to output a stable voltage and provide power for the integrated components on the PCB board, including a DC / DC module, a DAC chip, a single-chip microcomputer and its digital temperature sensor, and an adjustment resistor.

[0027] Furthermore, the filter circuit includes a power supply filter circuit and a signal filter circuit, which are used to provide a low-noise output signal;

[0028] The power supply filter circuit uses magnetic bead isolation and capacitor bypass filtering to filter noise; the signal filter circuit uses RC low-pass filter circuit.

[0029] Specifically, refer to Figure 3 and Figure 4 As shown, Figure 4 The capacitance of the middle capacitor c is 0.1μF. The power supply filter circuit adopts two-stage filtering and the principle of nearby filtering. Every 4 detection units form a group. The two-stage filtering includes a primary voltage filtering isolation circuit and a secondary voltage protection filtering circuit. The primary voltage filtering isolation circuit uses two capacitors to filter the output of the DC / DC module and then uses magnetic beads for isolation and then introduces it into the power supply layer. The power supply is divided into eight groups to reduce the impact of mutual power supply. In the secondary voltage protection filtering circuit, the power supply of each detector is protected by a surface-mounted fuse and then bypassed by a small surface-mounted capacitor, so that the power supply of a single detector does not affect each other and is powered separately.

[0030] The resistors and capacitors for signal filtering are both small surface-mount capacitors, so that each detector output signal has a low-pass filter circuit and is powered and filtered separately.

[0031] Furthermore, the power supply filter circuit, the YSO detector array and the signal filter circuit are connected in sequence.

[0032] Furthermore, the YSO detector array is composed of a plurality of YSO detection units, including a SiPM array and a YSO thin crystal positioned and coupled by optical glue, for measuring low-intensity single-particle signals.

[0033] Specifically, refer to Figure 5 As shown, the YSO detector array adopts a 4×N structure, and the signal extraction does not cross, which reduces mutual interference and improves the signal-to-noise ratio, thereby improving the energy resolution. Each detection unit has independent power supply filtering and signal filtering; the detector design is optimized by using equal-length, symmetrical, and non-crossing layout and wiring methods.

[0034] The above-mentioned detector, the test circuit includes an SMA output connector and a jumper input interface, which is used to test the output signal of the detection unit in the YSO detector array and check the working status of the detection unit in the array.

[0035] In a specific embodiment, the thickness of the scintillation crystal is selected to be 5 mm, the array type YSO detector is selected to be a 4×8 array, the capacitors in the primary voltage filter isolation circuit are selected to be 0.1 uF and 47 uF, and the surface mounted small capacitor in the secondary voltage protection filter circuit is 0.1 uF. The simulation effect is as follows Figure 6 As shown, it can be seen that the detector is suitable for low-energy measurement, has low detection efficiency for energy above 300keV, and plays a role in suppressing high-energy interference signals; refer to Figure 7 As shown, each detection unit is analyzed 241 The energy resolution measurement results of Am show that the energy resolution is basically around 20%, which is better than the 24% reported in the current relevant literature.

[0036] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can refer to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system or system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can 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 may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without creative work.

[0037] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be 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 will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A combined array type YSO scintillation detector, It is characterized in that The invention comprises a YSO detector array, a power supply regulating circuit, a filtering circuit, a testing circuit, a load and an interface circuit thereof which are integrated on a PCB board.

2. A combined array type YSO scintillation detector according to claim 1, It is characterized in that The power regulation circuit is used to output a stable voltage and provide power for the integrated components on the PCB board, including a DC / DC module, a DAC chip, a single-chip microcomputer and its digital temperature sensor, and a regulating resistor.

3. A combined array type YSO scintillation detector according to claim 1, It is characterized in that The filter circuit includes a power supply filter circuit and a signal filter circuit, which are used to provide a low-noise output signal; The power supply filter circuit uses magnetic bead isolation and capacitor bypass filtering to filter noise; the signal filter circuit uses RC low-pass filter circuit.

4. A combined array type YSO scintillation detector according to claim 3, It is characterized in that The power supply filtering circuit, the YSO detector array and the signal filtering circuit are connected in sequence.

5. The combined array type YSO scintillation detector according to claim 1, It is characterized in that The YSO detector array is composed of multiple YSO detection units, including a SiPM array and a YSO thin crystal positioned and coupled using optical glue, and is used to measure low-intensity single-particle signals.

6. The combined array type YSO scintillation detector according to claim 1, It is characterized in that The test circuit includes an SMA output connector and a jumper input interface, which are used to test the output signal of the detection unit in the YSO detector array and check the working status of the detection unit in the array.

Images