Hard x-ray imaging system with both radiation intensity and radiation spectrum measurement

Abstract

The application discloses a hard X-ray imaging system with radiation intensity and radiation spectrum measurement functions, which uses a support tube as a visible light channel, the input end of the support tube is connected with a detection unit to receive hard X-rays and convert the hard X-rays into visible light, a light splitting unit is arranged in the support tube, the visible light input from the input end is split into two paths, and the two paths of visible light are output through a first output end and a second output end respectively, so that a radiation spectrum measurement unit and a radiation intensity measurement unit simultaneously measure the visible light converted from the hard X-rays, and the radiation spectrum and the radiation intensity of the hard X-rays are obtained. The detection unit, the radiation spectrum measurement unit and the radiation intensity measurement unit are integrated together through the support unit, the problem that the current hard X-ray diagnosis system can only measure one thing is effectively solved, the limitation of the hard X-ray imaging system is reduced, and the hard X-ray imaging system can be applied to real-time feedback control of a tokamak device plasma and fast electron physical research.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of optical testing in physics, and particularly relates to a hard X-ray imaging system with radiation intensity and radiation spectrum measurement. BACKGROUND

[0002] In a magnetic confinement plasma, the efficiency of radio frequency wave heating, current drive and the outbreak of some magnetohydrodynamic instabilities are closely related to fast electrons, although the proportion of fast electrons in the plasma is very small, but it has important influence on the stability of the plasma and the safe operation of the magnetic confinement device (such as a tokamak device). When the fast electrons, background electrons and ions collide, bremsstrahlung radiation is generated, thereby releasing hard X-rays, which carries a lot of information of the fast electrons, such as the radio frequency wave power deposition position and the spatiotemporal evolution characteristics of the fast electrons. Therefore, the measurement and diagnosis of the hard X-rays have important significance for the real-time feedback control of the tokamak device plasma and the fast electron physics research.

[0003] The traditional hard X-ray diagnostic system can generally only measure the radiation intensity or the energy spectrum, which has great limitations, because only the radiation intensity is measured, the information of the fast electrons contained in the measured data is less, and it is difficult to carry out in-depth physical analysis, and only the radiation energy spectrum is measured, the time resolution is low, and it cannot be used for real-time feedback and control of the plasma, and the applicability is poor. Therefore, it is necessary to design a hard X-ray imaging system with radiation intensity measurement and radiation energy spectrum measurement, so as to obtain the two-dimensional distribution of the radiation intensity and the radiation energy spectrum of the hard X-rays, so as to carry out the real-time feedback control of the tokamak device plasma and the fast electron physics research. SUMMARY

[0004] In view of the above technical problems of the prior art, the purpose of the present application is to provide a hard X-ray imaging system with radiation intensity and radiation spectrum measurement, to solve the technical problem of the single measurement of the current hard X-ray diagnostic system, and to achieve the effect of reducing the system limitation and improving the research applicability.

[0005] To solve the above technical problems, the present application adopts the following technical solutions:

[0006] The hard X-ray imaging system with radiation intensity and radiation spectrum measurement includes a support unit, the support unit includes a support pipe with an input end, a first output end and a second output end, a detection unit is connected to the input end for converting hard X-rays into visible light and inputting into the support pipe, a light splitting unit is arranged in the support pipe for splitting the visible light into two paths and outputting through the first output end and the second output end respectively, a radiation spectrum measurement unit is connected to the first output end for obtaining radiation spectrum information of the hard X-rays according to the received visible light, and a radiation intensity measurement unit is connected to the second output end for obtaining radiation intensity information of the hard X-rays according to the received visible light.

[0007] Further, the support pipe is a T-shaped pipe and includes a horizontal pipe and a vertical pipe in vertical communication with the horizontal pipe, one end of the horizontal pipe is the input end, the other end of the horizontal pipe is the first output end, and one end of the vertical pipe away from the horizontal pipe is the second output end.

[0008] Further, the light splitting unit includes a focusing lens, a first parallel light lens, a second parallel light lens and a light splitter, the focusing lens is coaxially arranged in the input end and fixed, the first parallel light lens is coaxially arranged in the first output end and fixed, the second parallel light lens is coaxially arranged in the second output end and fixed, the light splitter is arranged in the horizontal pipe and fixed, the light splitter is located between the focusing lens and the first parallel light lens, one side of the light splitter faces the focusing lens and the second parallel light lens, and the other side of the light splitter faces the first parallel light lens, and the axes of the focusing lens, the first parallel light lens and the second parallel light lens all pass through the center of the light splitter.

[0009] Further, the support unit further includes a first connecting pipe, a second connecting pipe and a third connecting pipe, the radiation spectrum measurement unit is connected in the first connecting pipe, the first connecting pipe is coaxial with the first output end and detachably and sealingly connected, the radiation intensity measurement unit is connected in the second connecting pipe, the second connecting pipe is coaxial with the second output end and detachably and sealingly connected, and the detection unit is connected in the third connecting pipe, the third connecting pipe is coaxial with the input end and detachably and sealingly connected.

[0010] Further, the support pipe is divided into two detachably and sealingly connected support pipe sections along the light splitter.

[0011] Further, the first connecting pipe and the first output end are detachably and sealingly connected through a first connecting ring, the second connecting pipe and the second output end are detachably and sealingly connected through a second connecting ring, the third connecting pipe and the input end are detachably and sealingly connected through a third connecting ring, and the two support pipe sections are detachably and sealingly connected through a fourth connecting ring at the joint.

[0012] Further, the detection unit includes an X-ray detector and a shielding collimator, the X-ray detector is connected in the third connecting pipe, and the shielding collimator is connected to the end of the third connecting pipe away from the input end.

[0013] Further, the shielding collimator comprises a shielding body connected with the third connecting pipe away from the input end, and a through hole in the shape of a cone or a pyramid is transversely arranged on the shielding body, the through hole is coaxial with the third connecting pipe, and the large-diameter end of the through hole faces the third connecting pipe.

[0014] Further, the radiation intensity measuring unit comprises a second light path collimator, an imaging lens assembly and a high-speed camera which are sequentially arranged along the third connecting pipe in the axial direction, and the second light path collimator is arranged close to the second output end.

[0015] Further, the radiation intensity measuring unit comprises a second light path collimator, an imaging lens assembly and a high-speed camera which are sequentially arranged along the third connecting pipe in the axial direction, and the second light path collimator is arranged close to the second output end.

[0016] Compared with the prior art, the present application has the following beneficial effects:

[0017] The hard X-ray imaging system with radiation intensity and radiation spectrum measurement functions has the support pipe with the input end, the first output end and the second output end as the visible light channel, the detection unit is connected with the input end to receive the hard X-ray and convert it into visible light input into the support pipe, the light splitting unit is arranged in the support pipe, so that the visible light input from the input end is split into two paths, the two paths of visible light are output through the first output end and the second output end respectively, the radiation spectrum measuring unit and the radiation intensity measuring unit simultaneously measure the visible light converted from the hard X-ray, so as to obtain the radiation spectrum and the radiation intensity of the hard X-ray. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The structural schematic view of the hard X-ray imaging system with radiation intensity and radiation spectrum measurement functions according to the embodiment;

[0019] Figure 2 The structural schematic view of the hard X-ray imaging system with radiation intensity and radiation spectrum measurement functions according to the embodiment;

[0020] Figure 3 The structural schematic view of the hard X-ray imaging system with radiation intensity and radiation spectrum measurement functions according to the embodiment;

[0021] Figure 4The schematic diagram of the composition of the radiation energy spectrum measurement unit and the structural relationship with the first connecting pipe for the embodiment;

[0022] Figure 5 The schematic diagram of the composition of the radiation intensity measurement unit and the structural relationship with the second connecting pipe for the embodiment;

[0023] Wherein, the shielding body 1, the X-ray detector 2, the light splitting unit 3, the focusing lens 3-1, the light splitter 3-2, the first parallel light lens 3-3, the second parallel light lens 3-4; the radiation energy spectrum measurement unit 4, the photoelectric detector 4-1, the first light path collimator 4-2, the analog-to-digital conversion module 4-3, the FPGA energy spectrum online algorithm module 4-4; the radiation intensity measurement unit 5, the second light path collimator 5-1, the imaging lens assembly 5-2, the high-speed camera 5-3; the support unit 6, the third connecting pipe 6-1, the third connecting ring 6-2, the fourth connecting ring 6-3, the first connecting ring 6-4, the first connecting pipe 6-5, the second connecting ring 6-6, the second connecting pipe 6-7, the horizontal pipe 6-8, and the vertical pipe 6-9. DETAILED DESCRIPTION

[0024] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described below in connection with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0025] It should be noted that similar reference numerals and letters refer to like items in the accompanying drawings and that, as such, once an item is defined in one drawing, that definition should be applied to all like items through out the other drawings accompanying this disclosure. In the description of the present application, it is to be understood that the terms "central", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, are used to denote orientation or positional relationships in the drawings and are made only for purposes of illustration and description, and do not serve as limitations of specifically oriented or positional features of the application, and thus are used merely to facilitate description of the application and its attendant drawings, and are not intended to connote or dictate specific orientations or positional relationships in the scope of the application. Furthermore, the terms "first", "second", "third", and the like, are used merely to identify different features, and are not intended to connote or dictate relative importance of the features so identified. Furthermore, the terms "horizontal" and "vertical" are used merely to identify the relative directional orientation of the components, and do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" merely means that the orientation is more horizontal than "vertical", and does not mean that the structure must be absolutely horizontal, but can be slightly inclined. In the description of the present application, it is also to be understood that the terms "disposed", "mounted", "connected", "coupled", and the like, are used generically and means, for example, that the items being connected or coupled can be directly connected or coupled, or can be indirectly connected or coupled via intervening items, and that the items being connected or coupled need not be directly adjacent to one another and can be in direct or indirect communication (e.g., via an internal line), and that the items being connected or coupled need not be the same item, but can be different items.

[0026] Embodiment:

[0027] Please refer to Figure 1 , the hard X-ray imaging system with radiation intensity and radiation spectrum measurement includes a support unit 6, the support unit 6 includes a support tube with an input end, a first output end and a second output end, a detection unit is connected with the input end for converting hard X-rays into visible light and inputting into the support tube, the support tube is provided with a light splitting unit 3 for splitting the visible light into two paths and outputting through the first output end and the second output end respectively, a radiation spectrum measurement unit 4 is connected with the first output end for obtaining radiation spectrum information of hard X-rays according to the received visible light, and a radiation intensity measurement unit 5 is connected with the second output end for obtaining radiation intensity information of hard X-rays according to the received visible light.

[0028] The hard X-ray imaging system with radiation intensity and radiation spectrum measurement has a support pipe with an input end, a first output end and a second output end as a visible light channel, the input end is connected with a detection unit to receive hard X-rays and convert the hard X-rays into visible light input into the support pipe, a light splitting unit 3 is arranged in the support pipe, so that the visible light input from the input end is split into two paths, the two paths of visible light are output through the first output end and the second output end respectively, and the radiation spectrum measurement unit 4 and the radiation intensity measurement unit 5 simultaneously measure the visible light converted from the hard X-rays, so as to obtain the radiation spectrum and the radiation intensity of the hard X-rays. The detection unit, the radiation spectrum measurement unit 4 and the radiation intensity measurement unit 5 are integrated together by the support unit 6, and the radiation spectrum measurement unit 4 and the radiation intensity measurement unit 5 realize the synchronous measurement of the hard X-rays by the light splitting unit 3, effectively solving the problem that the current hard X-ray diagnostic system measures only one, and being conducive to reducing the limitation of the hard X-ray imaging system, and being applicable to the real-time feedback control of the tokamak device plasma and the fast electron physical research.

[0029] Please refer to Figure 1 and Figure 2 In the embodiment, the specific structure of the support pipe is as follows: the support pipe is a T-shaped three-way pipe and includes a horizontal pipe 6-8 and a vertical pipe 6-9 which is in vertical communication with the horizontal pipe 6-8, one end of the horizontal pipe 6-8 is the input end, the other end of the horizontal pipe 6-8 is the first output end, and the end of the vertical pipe 6-9 away from the horizontal pipe 6-8 is the second output end.

[0030] Please refer to Figure 1 and Figure 2 The light splitting unit 3 includes a focusing lens 3-1, a first parallel light lens 3-3, a second parallel light lens 3-4 and a light splitting mirror 3-2; the focusing lens 3-1 is coaxially arranged in the input end and fixed, the first parallel light lens 3-3 is coaxially arranged in the first output end and fixed, the second parallel light lens 3-4 is coaxially arranged in the second output end and fixed, the light splitting mirror 3-2 is obliquely arranged in the horizontal pipe 6-8 and fixed, the light splitting mirror 3-2 is located between the focusing lens 3-1 and the first parallel light lens 3-3, one side of the light splitting mirror 3-2 faces the focusing lens 3-1 and the second parallel light lens 3-4, the other side of the light splitting mirror 3-2 faces the first parallel light lens 3-3, and the axes of the focusing lens 3-1, the first parallel light lens 3-3 and the second parallel light lens 3-4 all pass through the center of the light splitting mirror 3-2.

[0031] Please refer to Figure 3The support unit 6 further comprises a first connecting pipe 6-5, a second connecting pipe 6-7 and a third connecting pipe 6-1, the radiation energy spectrum measuring unit 4 is connected in the first connecting pipe 6-5, the first connecting pipe 6-5 is coaxial with the first output end and detachably and sealably connected, the radiation intensity measuring unit 5 is connected in the second connecting pipe 6-7, the second connecting pipe 6-7 is coaxial with the second output end and detachably and sealably connected, and the detecting unit is connected in the third connecting pipe 6-1, the third connecting pipe 6-1 is coaxial with the input end and detachably and sealably connected; in this way, the detecting unit, the radiation energy spectrum measuring unit 4 and the radiation intensity measuring unit 5 are respectively detachably and sealably connected with the support pipe through the third connecting pipe 6-1, the first connecting pipe 6-5 and the second connecting pipe 6-7, which not only ensures that the inside of the hard X-ray imaging system is sealed and light-tight, but also makes the hard X-ray imaging system convenient to assemble, disassemble, maintain and repair.

[0032] Please refer to Figure 2 and Figure 3 The support pipe is divided into two detachably and sealably connected support pipe sections along the plane where the spectroscope 3-2 is located; in this way, the support pipe is divided into two support pipe sections at the spectroscope 3-2, which facilitates the installation and disassembly and maintenance of the spectroscope 3-2, the focusing lens 3-1, the first parallel light lens 3-3 and the second parallel light lens 3-4 in the support pipe.

[0033] Please refer to Figure 3, the first connecting pipe 6-5 and the first output end are detachably and sealingly connected through the first connecting ring 6-4, the second connecting pipe 6-7 and the second output end are detachably and sealingly connected through the second connecting ring 6-6, the third connecting pipe 6-1 and the input end are detachably and sealingly connected through the third connecting ring 6-2, and the two supporting pipe sections are detachably and sealingly connected through the fourth connecting ring 6-3 at the joint; in this way, the supporting unit 6 is used for connecting and fixing the remaining units to form the hard X-ray imaging system, the entire system is sealed and light-tight through the first connecting ring 6-4, the second connecting ring 6-6, the third connecting ring 6-2 and the fourth connecting ring 6-3, and even the light-transmitting part inside the supporting pipe of the supporting unit 6 is sealed and light-tight; the multiple connecting rings outside the supporting unit 6 are used to realize multiple detachable and sealing connections, so that the disassembly is more convenient and fast; in actual implementation, the first connecting ring 6-4, the second connecting ring 6-6, the third connecting ring 6-2 and the fourth connecting ring 6-3 can all adopt a flange structure, for example, the first connecting pipe 6-5 and the first output end are outwardly protruded to form a ring of connecting parts, two connecting parts form the first connecting ring 6-4, and the two connecting parts are sealingly abutted and connected through bolts penetrating transversely or an additional ring clamp.

[0034] Please refer to Figure 1 The detection unit includes an X-ray detector 2 and a shielding collimator, the X-ray detector 2 is connected in the third connecting pipe 6-1, and the shielding collimator is connected to one end of the third connecting pipe 6-1 away from the input end; the X-ray detector 2 is used for converting hard X-rays into visible light, that is, converting a ray signal into a light signal, the outermost part is a protective layer, the middle part is a scintillator, the bottom part is a supporting substrate, and the pixel points are filled with barium sulfate; in addition, the focusing lens 3-1 is made of ordinary glass, has a size comparable to the scintillator, has a distance from the scintillation screen equal to one lens focal length, and is installed in the input end through a circular ring-shaped fastener; the light splitter 3-2 is formed by coating a half-reflective film on ordinary glass, so that half of the incident light transmits through the lens, and the other half is reflected to the vertical direction, the light splitter 3-2 is elliptical, has a distance from the focusing lens 3-1 equal to one lens focal length, and has an axial angle of 45 degrees with the horizontal pipe 6-8, and is fixed in the horizontal pipe 6-8 through a fastener; the first parallel light lens 3-3 and the second parallel light lens 3-4 are made of ordinary glass, have a size comparable to the scintillator, have a distance from the center of the light splitter 3-2 equal to one lens focal length, and are respectively fastened in the first output end and the second output end through soft rubber.

[0035] Please see Figure 1 , the shielding collimator includes a shielding body 1, the shielding body 1 is connected with the third connecting pipe 6-1 away from the input end one end, the shielding body 1 is transversely provided with a conical or pyramidal through hole, the through hole is coaxial with the third connecting pipe 6-1, the large diameter end of the through hole is towards the third connecting pipe 6-1;Shielding body 1 is used for shielding the surrounding X-ray, only allowing the hard X-ray passing through the through hole to hit the scintillation screen of the X-ray detector 2, the shielding body 1 is a conical body processed from tungsten copper.

[0036] Please see Figure 4 , the radiation energy spectrum measurement unit 4 includes first light path collimator 4-2, photodetector 4-1, analog-digital conversion module 4-3 and FPGA energy spectrum online algorithm module 4-4 arranged in sequence along the second connecting pipe 6-7 axis direction, first light path collimator 4-2 is close to first output end setting;Wherein, the first light path collimator 4-2 is used for collimation of light, the surface is uniformly distributed with honeycomb small hole structure, the hole inner wall is coated with light absorbing material;Photodetector 4-1 converts optical signal into electrical signal through silicon photomultiplier, the outermost is protective layer, the middle is scintillation crystal (SiPM component), the bottom is support substrate, the peripheral size is the same as scintillation screen, silicon photomultiplier is composed of multiple dot matrix crystal units, the bottom is support plate, each crystal unit matches readout circuit, the peripheral size of silicon photomultiplier is equivalent to the size of scintillation screen, and is fixed in the input end by soft rubber pressing;Analog-digital conversion module 4-3 (ADC module) is used for converting analog electrical signal output by SiPM (silicon photomultiplier) into digital electrical signal;FPGA energy spectrum online algorithm module 4-4 quickly sorts the digitized signal output by analog-digital conversion module 4-3 into particle radiation data containing time and energy information, i.e. output data containing ray energy information.

[0037] Please see Figure 5 , the radiation intensity measurement unit 5 includes second light path collimator 5-1, imaging lens assembly 5-2 and high-speed camera 5-3 arranged in sequence along the third connecting pipe 6-1 axis direction, second light path collimator 5-1 is close to second output end setting;Wherein, the second light path collimator 5-1 is used for collimation and adjustment of spatial resolution of light, the surface is uniformly distributed with honeycomb small hole structure, the hole inner wall is coated with light absorbing material;Imaging lens assembly 5-2 is used for focusing visible light and outputting to photosensitive element of high-speed camera 5-3;High-speed camera 5-3 is used for directly imaging the photons in the field of view quickly.

[0038] In order to better understand the hard X-ray imaging system with radiation intensity and radiation energy spectrum measurement, the working principle is introduced as follows:

[0039] The hard X-ray generated by the Bremsstrahlung radiation of fast electrons in the plasma is absorbed by the scintillator to generate visible light. The spectroscope 3-2 divides the visible light into two parts. One part of the light signal continues to propagate along the direction of the light and is detected by the silicon photomultiplier to be converted into an electrical signal. The signal is then subjected to analog-to-digital conversion by the analog-to-digital conversion module 4-3 and spectrum online calculation by the FPGA spectrum online algorithm module 4-4, and output as particle radiation data containing time and energy information. The other part of the light signal propagates along the perpendicular direction of the original light path, directly passes through the imaging lens assembly 5-2, and enters the high-speed camera 5-3. The high-speed camera 5-3 directly captures the photon intensity information.

[0040] Specifically, the hard X-ray passes through the hole on the shielding body 1 and hits the X-ray detector 2. The X-ray detector 2 converts the hard X-ray into visible light and directs the light to the focusing lens 3-1. The focusing lens 3-1 converges the visible light from the scintillator and outputs parallel light. The spectroscope 3-2 divides the parallel light into two parts and delivers them to the first parallel light lens 3-3 and the second parallel light lens 3-4, respectively.

[0041] The first parallel light lens 3-3 converts the transmitted light from the spectroscope 3-2 into parallel light and delivers it to the radiation spectrum measurement unit 4. The radiation spectrum measurement unit 4 converts the light signal into an electrical signal, performs online arrangement and calculation, and outputs a digital signal containing time and energy information, i.e., radiation spectrum information. The first light path collimator 4-2 is used for collimation of the light. The photodetector 4-1 converts the light signal into an analog electrical signal through a silicon photomultiplier. The analog-to-digital conversion module 4-3 converts the obtained analog electrical signal into a digital electrical signal. The FPGA online spectrum algorithm quickly arranges the digital signal into particle radiation data containing time and energy information.

[0042] The second parallel light lens 3-4 converts the reflected light from the spectroscope 3-2 into parallel light and delivers it to the radiation intensity measurement unit 5. The radiation intensity measurement unit 5 directly collects the image of the light signal and outputs the radiation intensity information. The second light path collimator 5-1 is used for collimation of the light. The imaging lens assembly 5-2 focuses the visible light. The high-speed camera 5-3 directly images the emitted photons.

[0043] The hard X-ray imaging system with radiation intensity and radiation spectrum measurement comprises a shielding collimator, an X-ray detector 2, a light splitting unit 3, a radiation spectrum measurement unit 4, a radiation intensity measurement unit 5 and a support unit 6; the hard X-ray imaging system utilizes the characteristics that the rays interact with the scintillator to emit light, divides the visible light into two paths, one path is output to the photodetector 4-1 of the radiation spectrum measurement unit 4, and is processed and calculated online, so that the radiation spectrum spatial and temporal distribution of the hard X-ray is obtained; the other path is output to the high-speed camera 5-3 of the radiation intensity measurement unit 5, and the visible light is directly imaged, so that the radiation intensity spatial and temporal distribution of the hard X-ray is obtained.

[0044] The hard X-ray imaging system with radiation intensity and radiation spectrum measurement is a high spatial and temporal resolution hard X-ray two-dimensional imaging system, the light path is divided into two paths by the light splitting mirror 3-2, the face array type scintillation screen is matched with the photoelectric converter (photodetector 4-1) and the high-speed camera 5-3, the radiation intensity and the radiation spectrum of the hard X-ray from the plasma can be measured at the same time, the fast electron spatial and temporal evolution information can be obtained in real time, and the hard X-ray imaging system is suitable for the real-time feedback control and fast electron physical research of the tokamak plasma; the problems of low radiation measurement accuracy, low time resolution and single measurement information in the hard X-ray two-dimensional distribution measurement of the tokamak plasma at present are effectively solved, and the radiation intensity and the radiation spectrum of the hard X-ray can be obtained at the same time, the radiation intensity information can be used for the real-time control of the plasma, and the radiation spectrum can be used for the fast electron physical research, and the hard X-ray imaging system has good application prospect. The high time resolution radiation intensity signal can be used for the fast process research such as disruption mitigation and plasma control, and the radiation spectrum spatial and temporal evolution information can be used for analyzing the related physical problems such as radio frequency wave driving efficiency and fast electron distribution function; the face array type X-ray detector 2 has high integration, and high spatial resolution can be realized; the high-speed camera 5-3 has high acquisition speed, and high spatial resolution can be realized; the hard X-ray imaging system has simple and compact structure, and is convenient to install and maintain.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application but not limit the technical solutions, and those of ordinary skill in the art should understand that the technical solutions of the present application are modified or replaced equivalently without departing from the purpose and scope of the technical solutions, which should be covered in the scope of claims of the present application.

Claims

1. A hard X-ray imaging system with both radiation intensity and radiation spectrum measurement, characterized in that: The support unit comprises a support pipe having an input end, a first output end and a second output end, a detection unit connected to the input end for converting hard X-rays into visible light and inputting into the support pipe, a light splitting unit arranged in the support pipe for splitting the visible light into two paths and outputting through the first output end and the second output end respectively, a radiation energy spectrum measuring unit connected to the first output end for obtaining radiation energy spectrum information of the hard X-rays according to the received visible light, and a radiation intensity measuring unit connected to the second output end for obtaining radiation intensity information of the hard X-rays according to the received visible light. The support pipe is a T-shaped pipe and comprises a horizontal pipe and a vertical pipe in vertical communication with the horizontal pipe, one end of the horizontal pipe serving as the input end, the other end of the horizontal pipe serving as the first output end, and one end of the vertical pipe away from the horizontal pipe serving as the second output end. The light splitting unit comprises a focusing lens, a first parallel light lens, a second parallel light lens and a light splitter, the focusing lens is coaxially arranged in the input end and fixed, the first parallel light lens is coaxially arranged in the first output end and fixed, the second parallel light lens is coaxially arranged in the second output end and fixed, and the light splitter is obliquely arranged in the horizontal pipe and fixed, the light splitter is located between the focusing lens and the first parallel light lens, one side of the light splitter faces the focusing lens and the second parallel light lens, and the other side of the light splitter faces the first parallel light lens, and the axes of the focusing lens, the first parallel light lens and the second parallel light lens all pass through the center of the light splitter. The support unit further comprises a first connecting pipe, a second connecting pipe and a third connecting pipe, the radiation energy spectrum measuring unit is connected in the first connecting pipe, the first connecting pipe is coaxial with the first output end and detachably and sealingly connected, the radiation intensity measuring unit is connected in the second connecting pipe, the second connecting pipe is coaxial with the second output end and detachably and sealingly connected, and the detection unit is connected in the third connecting pipe, the third connecting pipe is coaxial with the input end and detachably and sealingly connected. The radiation energy spectrum measuring unit comprises a first light path collimator, a photoelectric detector, an analog-to-digital conversion module and a FPGA energy spectrum online algorithm module arranged in sequence along the second connecting pipe, and the first light path collimator is arranged close to the first output end. The radiation intensity measuring unit comprises a second light path collimator, an imaging lens assembly and a high-speed camera arranged in sequence along the third connecting pipe, and the second light path collimator is arranged close to the second output end.

2. The hard X-ray imaging system with both radiation intensity and radiation energy spectrum measurement according to claim 1, characterized in that: The support pipe is divided into two detachably and sealingly connected support pipe sections along the light splitter.

3. The hard X-ray imaging system with both radiation intensity and radiation energy spectrum measurement according to claim 2, characterized in that: The first connecting pipe and the first output end are detachably and sealingly connected through a first connecting ring, the second connecting pipe and the second output end are detachably and sealingly connected through a second connecting ring, the third connecting pipe and the input end are detachably and sealingly connected through a third connecting ring, and the two support pipe sections are detachably and sealingly connected through a fourth connecting ring at the joint.

4. The hard X-ray imaging system with both radiation intensity and radiation energy spectrum measurement according to claim 1, characterized in that: The detection unit comprises an X-ray detector and a shielding collimator, the X-ray detector is connected in the third connecting pipe, and the shielding collimator is connected to the end of the third connecting pipe away from the input end.

5. The hard X-ray imaging system with both radiation intensity and radiation energy spectrum measurement according to claim 4, characterized in that: The shielding collimator comprises a shielding body connected with the third connecting pipe away from the input end, and a through hole in the shape of a cone or a pyramid is transversely arranged on the shielding body, the through hole is coaxial with the third connecting pipe, and the large-diameter end of the through hole faces the third connecting pipe.

Images