A micro space star surface element detection device

Abstract

The present invention provides a micro-space celestial surface element detection device, comprising a crystal detection module, a photoelectric conversion module, and a back-end electronics module integrated within a magnesium alloy body. The crystal detection module comprises a CeBr3 crystal and four anti-coincidence plastic scintillators. The CeBr3 crystal's surface, except for the light-emitting surface, is coated with a reflective film. The four anti-coincidence plastic scintillators are distributed around the CeBr3 crystal. The photoelectric conversion module comprises a 3-inch PMT and four sets of 1-inch PMTs. The 3-inch PMTs are matched to the CeBr3 crystal to convert the CeBr3 crystal's optical signal into an electrical signal. The four sets of 1-inch PMTs are matched to the four anti-coincidence plastic scintillators to convert the anti-coincidence plastic scintillators' optical signals into electrical signals. The back-end electronics module comprises a control module, an amplifier module, and a data processing and transmission module for processing and transmitting the electrical signals from the photoelectric conversion module. This device is compact, lightweight, and low-power, and can be used to efficiently detect the content and distribution of K, Si, Mg, Th, H, O, Fe, and Ti on celestial surfaces.

Description

Technical field:

[0001] The present invention belongs to the field of space detection technology, and specifically relates to a micro space stellar surface element detection device, which can be used to efficiently detect the content and distribution of K, Si, Mg, Th, H, O, Fe, and Ti on the surface of a stellar body. Background technology:

[0002] Detecting the composition of celestial surface materials and determining the distribution of major elements on their surfaces is crucial for studying celestial geological evolution, locating water resources, which are essential for human survival, and preparing for future exploration, research, and landings on celestial bodies. Deep space exploration platforms are extremely limited and expensive, requiring lightweight, compact, and efficient detection equipment to observe the composition and distribution of major elements on celestial surfaces. Therefore, designing a compact, lightweight, and high-performance major element detection device to measure the composition and distribution of elements on celestial surfaces is essential, especially for future deep space exploration at greater distances. Summary of the invention:

[0003] The purpose of the present invention is to provide a micro space celestial body surface element detection device in view of the deficiencies in the prior art.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A micro-space celestial body surface element detection device includes a crystal detection module, a photoelectric conversion module and a back-end electronics module, wherein the crystal detection module, the photoelectric conversion module and the back-end electronics module are integrated inside the cavity of a magnesium alloy body; the crystal detection module includes a CeBr3 crystal and four anti-coincidence plastic scintillators; the CeBr3 crystal has a cylindrical structure, and the surface of the CeBr3 crystal except the light-emitting surface is covered with a reflective film, and the CeBr3 crystal covered with the reflective film is embedded in an aluminum alloy shell, and the space between the CeBr3 crystal and the aluminum alloy shell is filled with a buffer colloid; the four anti-coincidence plastic scintillators are distributed around the CeBr3 crystal, and the surface of the anti-coincidence plastic scintillator is covered with a reflective film, covering the packaged CeBr3 crystal from five directions, and the anti-coincidence plastic scintillators are respectively embedded in the aluminum alloy shell, and the space between the anti-coincidence plastic scintillator and the aluminum alloy shell is filled with a buffer colloid. The space between the PMT and the magnesium alloy shell is filled with buffer colloid; the photoelectric conversion module includes a set of 3inPMT (3-inch PMT) and four sets of identical 1inPMT (1-inch PMT), and the 1inPMT is evenly distributed around the 3inPMT. The 3inPMT and the four sets of 1inPMT are all embedded in the magnesium alloy shell, and the space between each PMT and the magnesium alloy shell is filled with buffer colloid, and the magnesium alloy shell is fixed inside the magnesium alloy body; the 3inPMT is matched with the CeBr3 crystal to convert the optical signal of the CeBr3 crystal into an electrical signal; the four sets of 1inPMT are respectively matched with four anti-coincidence plastic scintillators to convert the optical signal of the anti-coincidence plastic scintillator into an electrical signal; the back-end electronics module is connected to the photoelectric conversion module through a cable, and includes a control module, an amplifier module and a data processing and transmission module, which is used to process and transmit the electrical signal of the photoelectric conversion module.

[0006] Furthermore, the specifications of the CeBr3 crystal are

[0007] Furthermore, the base plate of the 1-in PMT is fixed to the magnesium alloy shell via a bracket, and the base plate of the 3-in PMT is fixed to the magnesium alloy shell via screws.

[0008] Furthermore, the magnesium alloy shell is fixedly installed in the magnesium alloy body by screws; the crystal detection module and the back-end electronics module are respectively installed in the magnesium alloy body by screws.

[0009] Furthermore, the magnesium alloy body and the magnesium alloy shell are both made of high-strength magnesium alloy MB8 or AZ40M.

[0010] Furthermore, the magnesium alloy body and the magnesium alloy shell are both subjected to black anodizing treatment so that their radiation coefficients are ≥0.85.

[0011] Furthermore, the magnesium alloy body is a rectangular structure with a cavity inside, and the crystal detection module, photoelectric conversion module and back-end electronics module are highly integrated inside the cavity of the magnesium alloy body to achieve miniaturization of the envelope size. The envelope size is: 200mmx160mmx157mm, and the total weight of the detection device is 4.5Kg.

[0012] Furthermore, the detection device can be used to efficiently detect the content and distribution of K, Si, Mg, Th, H, O, Fe, and Ti on the surface of a stellar body.

[0013] Furthermore, the energy resolution of the detection device is better than 4%@662keV.

[0014] Furthermore, the light-emitting surface of the CeBr3 crystal is sealed with optical coupling glue and a glass cover to prevent deliquescence of the CeBr3 crystal.

[0015] Beneficial effects of the present invention:

[0016] (1) The element detection device of the present invention uses high-efficiency, high-resolution CeBr3 crystals and high-performance anti-coincidence plastic scintillator EJ200 as detection materials, which can efficiently measure the gamma rays emitted by the main elements K, Si, Mg, Th, H, O, Fe, Ti, etc. on the surface of stellar bodies;

[0017] (2) The present invention forms a compact, lightweight structure and a specific mechanical interface through structural integration design, so that the element detection device can be fixed in a specific position, and the element detection device can meet the requirements of the space mechanical environment and withstand various forces generated during the launch process;

[0018] (3) The present invention places the opposite surface of the CeBr3 crystal to the PMT coupling surface perpendicular to the star surface, and flies around the surface of the star together with the satellite to detect the characteristic gamma rays emitted by the main elements. Combined with the satellite's position parameters, the content of the main elements K, Si, Mg, Th, H, O, Fe, Ti, etc. on the surface of the star and their distribution on the surface of the star can be calculated. Description of the drawings:

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of an embodiment of the present invention;

[0020] Figure 2 A cross-sectional view of an embodiment of the present invention;

[0021] Figure 3 This is a schematic structural diagram of a crystal detection module according to an embodiment of the present invention;

[0022] Figure 4 This is a schematic structural diagram of a photoelectric conversion module according to an embodiment of the present invention;

[0023] Figure numerals: 1. CeBr3 crystal; 2. Anti-coincidence plastic scintillator; 3. 3inPMT; 4. 1inPMT; 5. Magnesium alloy body; 6. Magnesium alloy shell; 7. Bracket; 8. Back-end electronics module. Specific implementation method:

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 shall fall within the scope of protection of the present invention.

[0025] Reference Figures 1 to 3 The embodiment of the present invention provides a miniaturized, lightweight, low-power efficient micro-space stellar surface element detection device, which can be used to efficiently detect the content and distribution of K, Si, Mg, Th, H, O, Fe, and Ti on the surface of a stellar body.

[0026] Specifically, the detection device includes a crystal detection module, a photoelectric conversion module and a back-end electronics module, which are integrated inside the cavity of the magnesium alloy body 5 .

[0027] The crystal detection module includes a CeBr3 crystal 1 and four anti-coincidence plastic scintillators 2; the CeBr3 crystal 1 is a cylindrical structure with a specification of Except for the light-emitting surface, the surface of the CeBr3 crystal 1 is covered with a reflective film (Teflon). The light-emitting surface of the CeBr3 crystal 1 is sealed with optical coupling glue and a glass cover to prevent the CeBr3 crystal 1 from deliquescing. The CeBr3 crystal 1 covered with the reflective film is embedded in an aluminum alloy shell. The space between the CeBr3 crystal 1 and the aluminum alloy shell is filled with buffer colloid to protect the crystal from direct mechanical impact; the four anti-compliant plastic scintillators 2 are evenly distributed around the CeBr3 crystal 1, and the surface of the anti-compliant plastic scintillator 2 is covered with a reflective film (Teflon), and the outer periphery of the Teflon is covered with black tape for protection; the four anti-compliant plastic scintillators include three straight-type anti-compliant plastic scintillators and one L-shaped anti-compliant plastic scintillator, which can cover the encapsulated CeBr3 crystal 1 from five directions to reduce the background generated by charged particles. The anti-coincidence plastic scintillators 2 are respectively embedded in the aluminum alloy shell, and the space between the anti-coincidence plastic scintillators 2 and the aluminum alloy shell is filled with buffer colloid; the opposite surface of the CeBr3 crystal 1 to the PMT coupling surface is perpendicular to the star surface.

[0028] The photoelectric conversion module includes a set of 3-inch PMTs 3 and four sets of identical 1-inch PMTs 4, which are evenly distributed around the 3-inch PMTs 3. The 3-inch PMTs 3 and the four sets of 1-inch PMTs 4 are embedded in a magnesium alloy housing 6. A buffer colloid is filled between each PMT and the magnesium alloy housing 6, and the colloid also fixes the PMT in the magnesium alloy housing 6. The magnesium alloy housing 6 is fixed in the magnesium alloy body 5. The 3-inch PMTs 3 are matched with the CeBr 3 crystals 1 to convert the optical signals of the CeBr 3 crystals 1 into electrical signals. The four sets of 1-inch PMTs 4 are respectively matched with four anti-coincidence plastic scintillators 2 to convert the optical signals of the anti-coincidence plastic scintillators 2 into electrical signals.

[0029] The back-end electronics module is connected to the photoelectric conversion module via a cable, and includes a control module, an amplifier module, and a data processing and transmission module. The amplifier module shapes, amplifies, and peak-protects the signal from the PMT, and the control module and the data processing and transmission module are used to realize data collection and transmission.

[0030] In an embodiment of the present invention, the base plate of the 1inPMT4 is fixed to the magnesium alloy shell 6 through a bracket 7, and the base plate of the 3inPMT3 is fixed to the magnesium alloy shell 6 through screws; the magnesium alloy shell 6 is fixedly installed in the magnesium alloy body 5 through screws; the crystal detection module and the back-end electronics module are respectively installed in the magnesium alloy body 5 through screws.

[0031] In the embodiment of the present invention, the CeBr3 crystal 1 and the four anti-coincidence plastic scintillators 2 are respectively arranged in their own aluminum alloy shells. The five aluminum alloy shells are located in the internal cavity of the magnesium alloy body 5 and are fixedly connected to the magnesium alloy body 5 by screws.

[0032] In the embodiment of the present invention, the materials of the magnesium alloy body 5 and the magnesium alloy shell 6 are both high-strength magnesium alloy MB8 or AZ40M, which has high strength and low density and can reduce the weight of the device; and the magnesium alloy body 5 and the magnesium alloy shell 6 are both black anodized so that their emissivity is ≥0.85.

[0033] In an embodiment of the present invention, the magnesium alloy body 5 is a rectangular parallelepiped structure with a cavity inside. The crystal detection module, photoelectric conversion module and back-end electronics module are highly integrated inside the cavity of the magnesium alloy body 5, realizing miniaturization of the envelope size. The envelope size is: 200mmx160mmx157mm, the total weight of the detection device is 4.5Kg, and the energy resolution is better than 4%@662keV.

[0034] In this embodiment, the 3inPMT and 1inPMT used are both photomultiplier tubes produced by Japan's Bingsong Company, which realize the conversion of fluorescence generated by CeBr3 and plastic scintillator into electrical signals; the CeBr3 crystal used is purchased from SCIONIX Company in the Netherlands; the anti-coincidence detection plastic scintillator EJ200 involved is purchased from EJ Company in the United States.

[0035] The above are only preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the scope of protection of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications without departing from the principle of the present invention should be regarded as the scope of protection of the present invention.

Claims

1. A micro space celestial body surface element detection device, characterized in that: It comprises a crystal detection module, a photoelectric conversion module and a back-end electronics module, wherein the crystal detection module, the photoelectric conversion module and the back-end electronics module are integrated inside the cavity of the magnesium alloy body (5); The crystal detection module comprises a CeBr3 crystal (1) and four anti-coincidence plastic scintillators (2); the CeBr3 crystal (1) is in a cylindrical structure, and the surface of the CeBr3 crystal (1) is coated with a reflective film except for the light-emitting surface, and the CeBr3 crystal (1) coated with the reflective film is embedded in an aluminum alloy shell, and the space between the CeBr3 crystal (1) and the aluminum alloy shell is filled with a buffer colloid; the four anti-coincidence plastic scintillators (2) are distributed around the CeBr3 crystal (1), and the four anti-coincidence plastic scintillators include three straight-plate anti-coincidence plastic scintillators and one L-shaped anti-coincidence plastic scintillator, and the surface of the anti-coincidence plastic scintillator (2) is coated with a reflective film, covering the packaged CeBr3 crystal (1) from five directions, and the anti-coincidence plastic scintillators (2) are respectively embedded in the aluminum alloy shell, and the space between the anti-coincidence plastic scintillator (2) and the aluminum alloy shell is filled with a buffer colloid; The photoelectric conversion module includes a set of 3-inch PMT (3) and four sets of the same 1-inch PMT (4). 1-inch PMTs (4) are evenly distributed around the 3-inch PMTs (3), the 3-inch PMTs (3) and the four sets of 1-inch PMTs (4) are all embedded in a magnesium alloy shell (6), a buffer colloid is filled between each PMT and the magnesium alloy shell (6), and the magnesium alloy shell (6) is fixed inside the magnesium alloy body (5); The 3in PMT (3) is matched with the CeBr3 crystal (1) to convert the optical signal of the CeBr3 crystal (1) into an electrical signal; the four sets of 1in PMT (4) are matched with the four anti-coincidence plastic scintillators (2) respectively to convert the optical signal of the anti-coincidence plastic scintillators (2) into an electrical signal; The back-end electronics module is connected to the photoelectric conversion module via a cable, and includes a control module, an amplifier module and a data processing and transmission module, which are used to process and transmit the electrical signals of the photoelectric conversion module.

2. The micro space celestial body surface element detection device according to claim 1, characterized in that: The specifications of the CeBr3 crystal (1) are 3. The micro space celestial body surface element detection device according to claim 1, characterized in that: The base plate of the 1-in PMT (4) is fixed to the magnesium alloy housing (6) via a bracket (7), and the base plate of the 3-in PMT (3) is fixed to the magnesium alloy housing (6) via screws.

4. The micro space celestial body surface element detection device according to claim 1, characterized in that: The magnesium alloy housing (6) is fixedly installed in the magnesium alloy body (5) by means of screws; and the crystal detection module and the back-end electronics module are respectively installed in the magnesium alloy body (5) by means of screws.

5. The micro space celestial body surface element detection device according to claim 1, characterized in that: The magnesium alloy body (5) and the magnesium alloy shell (6) are both made of high-strength magnesium alloy MB8 or AZ40M.

6. The micro space celestial body surface element detection device according to claim 1, characterized in that: The magnesium alloy body (5) and the magnesium alloy shell (6) are both subjected to black anodizing treatment so that their radiation coefficients are ≥0.

85.

7. The micro space celestial body surface element detection device according to claim 1, characterized in that: The magnesium alloy body (5) is a rectangular parallelepiped structure with a cavity therein. The crystal detection module, the photoelectric conversion module and the back-end electronics module are highly integrated inside the cavity of the magnesium alloy body (5), thereby miniaturizing the envelope size. The envelope size is: 200mmx160mmx157mm, and the total weight of the detection device is 4.5Kg.

8. The micro space celestial body surface element detection device according to claim 1, characterized in that: The detection device can be used to efficiently detect the content and distribution of K, Si, Mg, Th, H, O, Fe, and Ti on the surface of a stellar body.

9. The micro space celestial body surface element detection device according to claim 1, characterized in that: The energy resolution of the detection device is better than 4%@662keV.

10. The micro space celestial body surface element detection device according to claim 1, characterized in that: The light-emitting surface of the CeBr3 crystal (1) is sealed with optical coupling glue and a glass cover to prevent the CeBr3 crystal from deliquescing.

Images