CN109115817A - A kind of Wavelength conversion film and curved detector for curved detector - Google Patents
A kind of Wavelength conversion film and curved detector for curved detector Download PDFInfo
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- CN109115817A CN109115817A CN201811122366.0A CN201811122366A CN109115817A CN 109115817 A CN109115817 A CN 109115817A CN 201811122366 A CN201811122366 A CN 201811122366A CN 109115817 A CN109115817 A CN 109115817A
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- wavelength conversion
- conversion film
- optical fiber
- scintillator
- curved detector
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/20—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by using diffraction of the radiation by the materials, e.g. for investigating crystal structure; by using scattering of the radiation by the materials, e.g. for investigating non-crystalline materials; by using reflection of the radiation by the materials
- G01N23/20008—Constructional details of analysers, e.g. characterised by X-ray source, detector or optical system; Accessories therefor; Preparing specimens therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/20—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by using diffraction of the radiation by the materials, e.g. for investigating crystal structure; by using scattering of the radiation by the materials, e.g. for investigating non-crystalline materials; by using reflection of the radiation by the materials
- G01N23/207—Diffractometry using detectors, e.g. using a probe in a central position and one or more displaceable detectors in circumferential positions
Abstract
The invention discloses a kind of Wavelength conversion films and curved detector for curved detector, the curved detector includes Wavelength conversion film, fixed cover, signal input port, fiber optic bundle, signal output port and receiver port, there is concaved circular cambered surface on the left of signal input port, the diffraction of concaved circular cambered surface and x-ray diffraction circle matches, Wavelength conversion film is mounted on concaved circular cambered surface by fixed cover, there is perforative accurate slit on concaved circular cambered surface, fiber optic bundle is installed by predetermined regular ordered arrangement in accurate slit, the end face of every optical fiber incidence end in fiber optic bundle is coupled with Wavelength conversion film without spacing, and it is sequentially fixed on the extended line in diffraction radius of circle direction.The present invention is small in size, light-weight, without conventional rotatable parts, not only realizes non-maintaining, reduces costs, and due to being worked using Non-scanning mode mode, speed is fast, realizes the real-time detection of x-ray diffraction map.
Description
Technical field
The invention belongs to x-ray diffraction detection technology field more particularly to a kind of wavelength converts for curved detector
Film and curved detector.
Background technique
X-ray diffraction analyzes (X-ray diffraction, abbreviation XRD), is the X-ray diffraction using scintillator, to group
At the atom size of amorphous material and the structure analysis method of spatial distribution.It is specifically to irradiate the x-ray of specific wavelength
When on to crystal material, because encountering the trellis of regularly arranged atomic building in scintillator diffraction occurs for x-ray, from
And show diffraction phenomena corresponding with crystalline texture.The Wavelength conversion film of the x-ray diffraction used in the prior art is most only
It is one layer of scintillator coatings of covering on detector receiving plane, structure is simple, and transfer efficiency is also very low, if detector exists
It works in moist environment, coating dampness, it is possible to lead to scintillator qualitative change, so that the use of detector goes wrong.
In addition, existing detect mainly using angular instrument progress, θ axle position placement location material x-ray diffraction information
Powder crystal sample, 2 θ shaft positions place point detector, and point detector divides scintillation counter and proportional counter.Conventional x-ray diffraction
When analysis, formula measurement is scanned using angular instrument, point detector is revolved on diffraction circle with the angular speed for being twice in sample
Turn, diffraction occurs when the angle of diffraction meets bragg's formula, detector acquires the diffraction and background signal of sample simultaneously.Usually to 2 θ
It is that the diffracting spectrums of 50 ° of ranges carries out material phase analysis and needs 10 minutes or so, it is slow that this detection mode not only detects speed, cannot
The variation of in-situ study and the real-time capture structure of matter is carried out, and since the light source of x-ray is being visited with time change
The green strength for surveying light source in device rotary course changes, and the strength information comparativity of different diffraction locations is poor.A small number of X-rays
Diffraction analysis system uses two-dimensional surface Detection Techniques, such as IP plate, and the high-resolution two dimension that can receive x-ray diffraction line is visited
Surveying device (IP plate) is mainly that price is extremely expensive, and maintenance cost is high, and in addition diffraction information is spread out not on same Diffraction Diffraction circle
It penetrates intensity to convert, to affect the use of this detection mode, therefore IP plate is mostly used for resolution requirement not
In terms of high medical imaging.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of Wavelength conversion films and arc for curved detector
Detector, the Wavelength conversion film include metal outer frame, scintillator package substrates, metallic beryllium coating and more than two
Scintillator cells；
Scintillator package substrates are fixedly mounted in the metal outer frame, scintillator cells are distributed in scintillator package substrates
In, metallic beryllium coating is covered on scintillator package substrates upper surface, and is fixed by welding in metal outer frame.
The metal outer frame is flexible metal.
The scintillator package substrates are transparent polymeric film, and 50 microns of thickness, upper surface is in bee by laser ablation
Nest shape unit, each unit are regular hexagon, and side length is 12 microns, and interval is 2 microns thick, and depth is 30 microns, bottom thickness 20
Micron.Scintillator cells are distributed in these honeycomb regular hexagon units.
The scintillator cells are sodium iodide.Material as scintillator is there are many kind, but it is to contain that transfer efficiency is highest
The metal halide of thallium causes its outer-shell electron transition when sigmatron photon excitation thallium, and into upper state, upper state is not
Stablize, the electrons being excited return stable lower state, while releasing visible light, to realize wavelength convert.Metal
It is preferred again with iodide effect in halide, main representative is sodium iodide and cesium iodide.The former is 3 times of the latter's transfer efficiency,
But the former hygroscopic deliquescence, the latter do not deliquesce then.By many experiments, transfer efficiency is used most to improve the transfer efficiency present invention
High sodium iodide.
The sodium iodide is sodium iodide containing thallium.
The generation method of sodium iodide containing thallium are as follows: configure pure sodium iodide supersaturated solution, 0.3% thallium is added (with iodine
Change the mass percent of sodium), it injects in alveolate cells, stand 3 hours at 80 DEG C of set temperature (strictly controlled environment vibration,
Prevent polycrystalline), sodium iodide containing thallium growth after the completion of need to be packaged with 10 microns of thickness of beryllium piece at once, prevent moisture content into
Enter.
The present invention also provides a kind of curved detector, the curved detector includes Wavelength conversion film, fixed cover, signal
Input port, fiber optic bundle, signal output port and receiver port, the side that signal input port receives x-ray have recessed
Arc surface, concaved circular cambered surface are adapted with the diffraction of x-ray diffraction circle, and Wavelength conversion film is mounted on concaved circular cambered surface by fixed cover
On, concaved circular cambered surface is equipped with perforative accurate slit, in accurate slit by the diffraction radius of circle extended line direction of x-ray diffraction from
Top to bottm ordered arrangement installs fiber optic bundle, and optical fiber is radial, makes end face and the wavelength of every optical fiber incidence end in fiber optic bundle
It converts film to couple without spacing, it is ensured that the visible light of conversion is directly entered optical fiber, lossless and extraneous light disturbance, the light of fiber optic bundle
Fine exit end is connect with signal output port；
Signal output port is provided with perforative accurate slit, and every fiber exit end in fiber optic bundle is pressed and incidence end phase
Same sequence is horizontally arranged from top to bottom to be mounted in accurate slit, arranges the exit end of all optical fiber linearly, signal is defeated
Exit port and receiver port are cooperatively connected.
Wavelength conversion film covers the side of metallic beryllium towards x-ray, and the other side is covered on concaved circular cambered surface.
The optical fiber extends the center of circle that line focus is diffraction circle, and optical fiber is mounted in optical fiber installs fixture, so that optical fiber
The end face of every optical fiber incidence end in beam is coupled with Wavelength conversion film without spacing.
The fiber optic bundle includes two or more optical fiber.
More than two scintillator encapsulation units are at least corresponded in the cross-sectional area of every optical fiber in the fiber optic bundle.
The Wavelength conversion film is fexible film.
The receiver port connects visible light charge-coupled device.
Detector front end of the present invention designs a concaved circular cambered surface, can by the x-ray through sample diffraction in particular range simultaneously
It all receives, without the scanning measurement of angular instrument and point detector, realizes real-time capture structure of matter information to be measured
Function ensure that in any angle of diffraction, at the same test moment, diffraction information is not by the shadow of intensity of light source change with the time
It rings.Another concaved circular cambered surface radius is customizable, so that there is no limit can adjust arc to the measurement range of x-ray diffraction information as needed
The radius of shape detector.
The utility model has the advantages that Wavelength conversion film provided by the invention uses special structure, and scintillator has been used containing thallium
Sodium iodide, so that general Wavelength conversion film improves 30% or more to transfer efficiency compared with the prior art, it is in addition of the invention
The special encapsulating structure that Wavelength conversion film uses can be effectively moisture-proof damp proof, enables detector using the Wavelength conversion film
It is adaptable enough in outdoor application, practical equipment is provided for ground observation exploitation.Using the detector of the Wavelength conversion film
It is small in size, it is light-weight, it without conventional rotatable parts, not only realizes non-maintaining, reduces costs, and due to using Non-scanning mode side
Formula work, speed is fast, realizes the real-time detection of x-ray diffraction map.Detector of the present invention analyzes especially the structure of matter
In-situ study has high meaning.The present invention can receive wide-angle (2 in the diffraction of sample x-ray diffraction circle simultaneously in real time
θ) range diffracted ray, and single receiving time is Millisecond, be ensure that in any angle of diffraction, at the same test moment, diffraction
Information is not influenced by intensity of light source change with the time.
Detailed description of the invention
The present invention is done with reference to the accompanying drawings and detailed description and is further illustrated, it is of the invention above-mentioned or
Otherwise advantage will become apparent.
Fig. 1 is the structure chart of detector provided by the invention.
Fig. 2 is the signal input port structure chart of detector provided by the invention.
Fig. 3 is the arrangement of signal input port optical fiber and the partial enlarged view of detector provided by the invention.
Fig. 4 is the output port of detector provided by the invention and its structural schematic diagram of inner fiber arrangement.
Fig. 5 is the partial enlarged view of the signal output port of detector provided by the invention.
Fig. 6 is the partial enlarged view of optical fiber arrangement at the signal output port of detector provided by the invention.
Fig. 7 is the arrangement architecture schematic diagram of the conduction optical fiber of detector provided by the invention.
Fig. 8 is the working principle diagram of detector provided by the invention.
Fig. 9 is scintillator package substrates upper surface part subsection.
Figure 10 is Wavelength conversion film Local map.
Figure 11 is Wavelength conversion film side sectional view.
Figure 12 is diffracted ray and optical fiber schematic diagram.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and embodiments.
Embodiment
Present embodiments provide a kind of Wavelength conversion film for curved detector, as shown in Figure 10 and Figure 11, the wave
Long conversion film 9 includes metal outer frame 91, scintillator package substrates 92, metallic beryllium coating 93 and more than two scintillators
Unit 94；
Scintillator package substrates (92) are fixedly mounted in the metal outer frame 91, scintillator cells (94) are distributed in scintillator
In package substrates 92, metallic beryllium coating 93 is covered on 92 upper surface of scintillator package substrates, and is fixed by welding in metal
On outline border 91；
Fig. 9 is scintillator package substrates upper surface part subsection, wherein 94 be scintillator cells, 92 be scintillator encapsulation
Substrate.Figure 10 is Wavelength conversion film Local map, wherein 93 be metallic beryllium coating, 91 be metal outer frame.Figure 11 is wavelength convert
Film side sectional view, wherein 91 metal outer frames, 92 scintillator package substrates, 93 metallic beryllium coatings, 94 scintillator cells.Institute
Stating Wavelength conversion film 9 is fexible film.Scintillator package substrates 92 are transparent polymeric film, and upper surface is in by laser ablation
Alveolate cells, each unit are regular hexagon, and scintillator cells 94 are distributed in these honeycomb regular hexagon units.
The scintillator cells 94 are sodium iodide.As the material of scintillator, there are many kinds, but transfer efficiency is highest is
Metal halide containing thallium causes its outer-shell electron transition when sigmatron photon excitation thallium, into upper state, upper state
Unstable, the electrons being excited return stable lower state, while releasing visible light, to realize wavelength convert.Gold
Belong in halide and being preferred again with iodide effect, main representative is sodium iodide and cesium iodide.The former is the 3 of the latter's transfer efficiency
Times, but the former hygroscopic deliquescence, the latter do not deliquesce then.The highest iodate of transfer efficiency is used to improve the transfer efficiency present invention
Sodium.
The sodium iodide is sodium iodide containing thallium.
Sodium iodide containing thallium is not easily generated under normal circumstances, and the present embodiment additionally provides the generation method of sodium iodide containing thallium: configuration
Pure sodium iodide supersaturated solution infuses the sodium iodide supersaturated solution that 0.3% (mass percent with sodium iodide) thallium is added
Enter in each alveolate cells, it is 3 hours static at 80 DEG C of temperature (strictly controlled environment vibration, prevent polycrystalline), make
The crystalline growth of sodium iodide containing thallium is full of each alveolate cells, then covers all entire flashing with the beryllium piece of thickness 10um
Body substrate is packaged.Complete the encapsulation to scintillator unit.The entirely generating process of sodium iodide containing thallium and last encapsulation
Cheng Bixu is completed in inert gas environment, excludes the influence of air and moisture.
By many experiments, sodium iodide containing thallium must install packaging method encapsulation of the present invention in the present invention after generating
Into honeycomb regular hexagon unit, sodium iodide containing thallium could be made to be under a stable state in this way, otherwise in detector
In use, the case where will appear unstable crystal, polycrystalline.The transfer efficiency of the sodium iodide containing thallium is compared to existing skill in the present embodiment
The general scintillator of art improves 30% or more.
Just hexagonal honeycomb ceramics is conducive to ensure to grow into monocrystalline when sodium iodide crystallization, will not limit because of volume and edge
Stress is generated, and then polycrystalline or twin occurs.30% or more transfer efficiency can be improved in filling space than other forms.Therefore
Transfer efficiency can be greatly reduced in the filling space of other forms, be not particularly suited for the sodium iodide containing thallium that the present invention generates.
The present embodiment additionally provides a kind of curved detector, is as shown in Figure 1 its structural schematic diagram, including Wavelength conversion film
9, fixed cover 10, signal input port 5, fiber optic bundle 6, signal output port 7 and receiver port 8, signal input port 7 connect
The side for receiving x-ray has concaved circular cambered surface 52, and concaved circular cambered surface 52 is adapted with the diffraction of x-ray diffraction circle 2, Wavelength conversion film 9
It is mounted on concaved circular cambered surface 52 by fixed cover 10, concaved circular cambered surface 52 is equipped with perforative accurate slit 51, in accurate slit 51
By the 2 radius extended line directions of diffraction circle of x-ray diffraction, ordered arrangement installs fiber optic bundle 6 from top to bottom, and optical fiber 61 is radial,
Couple the end face of every optical fiber incidence end in fiber optic bundle 6 without spacing with Wavelength conversion film 9, it is ensured that the visible light of conversion is direct
Into optical fiber 61, the fiber exit end of lossless and extraneous light disturbance, fiber optic bundle 6 is connect with signal output port 7.
Signal output port 7 is provided with perforative accurate slit 71, and every fiber exit end in fiber optic bundle 6 is pressed and incidence
It holds identical sequence is horizontally arranged to be from top to bottom mounted in accurate slit 71, arranges the exit end of all optical fiber linearly,
Signal output port 7 and receiver port 8 are cooperatively connected.
The optical fiber 61 extends the center of circle that line focus is diffraction circle 2, and optical fiber 61 is mounted in optical fiber installs fixture 53, makes
The end face for obtaining every optical fiber incidence end in fiber optic bundle 6 is coupled with Wavelength conversion film 9 without spacing.
Wavelength conversion film 9 covers the side of metallic beryllium towards x-ray, and the other side is covered on concaved circular cambered surface 52.
Fig. 2 is signal input port structure chart of the present invention, and 51 be accurate slit in Fig. 2, and 52 be concaved circular cambered surface, and Fig. 3 is originally
Invention signal input port optical fiber arranges and partial enlarged view, and 61 be optical fiber in Fig. 3, and 51 be accurate slit, and 53 be optical fiber installation
Fixture.Fig. 4 is the structural schematic diagram that output port of the present invention and its inner fiber arrange, and 71 be precision slit in Fig. 4.Fig. 5 is this
The partial enlarged view of invention signal output port.Fig. 6 is the partial enlarged view of optical fiber arrangement at signal output port of the present invention.Figure
7 be the arrangement architecture schematic diagram for conducting optical fiber.
Be illustrated in figure 8 schematic diagram when the present embodiment work, wherein 1 be characterized x-ray light source, 2 be that diffraction is round, 4 be
Powder crystal sample；When work, the curved detector of signature x-ray light source 1, powder crystal sample 4 and the present embodiment is respectively placed in diffraction circle 2
Corresponding position, signature x-ray light source 1 issue x-ray diffraction occurs after powder crystal sample 4, the x-ray after diffraction is by signal
Wavelength conversion film 9 on 5 concaved circular cambered surface of input port (arc radius is 50~100mm), which is received and converted, becomes specific wavelength
Visible light in the conduction optical fiber of the visible light entering signal input port 5 of specific wavelength, is then transferred to signal through conducting optical fiber
Output port 7, the linear array fiber-optic signal that signal output port 7 is emitted are received by receiver port 8, receiver port
8 be optical charge coupler, finally optical signal is changed into digital signal in real time, obtains the real-time diffracting spectrum of x-ray.
Concaved circular cambered surface 52 is on diffraction circle 2, and concaved circular cambered surface 52 is equipped with perforative accurate slit 51, at accurate slit 51
On the circular arc of diffraction circle, by diffraction radius of circle extended line direction, ordered arrangement installs fiber optic bundle from top to bottom in accurate slit 51
6, keep optical fiber arrangement radial, the extension line focus of optical fiber 61 is the round heart of diffraction, and optical fiber 61 is mounted on optical fiber installs fixture
In 53, it is ensured that the end face of every optical fiber incidence end in fiber optic bundle 6 is coupled with Wavelength conversion film 9 without spacing, it is ensured that every light
The x-ray light path that fibre receives is identical, it is ensured that every optical fiber receiving plane is circle, it is ensured that every optical fiber face x-ray receives
Area equation, it is ensured that the consistency of the reception signal of signal input port 5.
The fiber optic bundle 6 includes two or more optical fiber.
More than two scintillator encapsulation units are at least corresponded in the cross-sectional area of every optical fiber in the fiber optic bundle 6.
It is as shown in figure 12 diffracted ray and optical fiber schematic diagram, wherein α is that neighboring diffraction wire clamp angle can be close since α is very small
Seemingly regard the corresponding arc length l of α as and is approximately equal to fibre diameter D, i.e. l ≈ D, according to diffracted ray basic principle α≤0.02 °,50mm≤R≤100mm, it is known that,It is assumed that when R=100mm, D≤34.9um at this time.
At least more than two scintillator cells in a piece optical fiber, as D=34.um, each honeycomb regular hexagon unit side length
For 8.5um, it is spaced thickness 1um.
The present invention provides a kind of Wavelength conversion films and curved detector for curved detector, implement the skill
There are many method and approach of art scheme, the above is only a preferred embodiment of the present invention, it is noted that this technology is led
For the those of ordinary skill in domain, various improvements and modifications may be made without departing from the principle of the present invention, these
Improvements and modifications also should be regarded as protection scope of the present invention.The available prior art of each component part being not known in the present embodiment
It is realized.
Claims (9)
1. a kind of Wavelength conversion film for curved detector, which is characterized in that encapsulate base including metal outer frame (91), scintillator
Bottom (92), metallic beryllium coating (93) and more than two scintillator cells (94)；
Scintillator package substrates (92) are fixedly mounted on the metal outer frame (91), scintillator cells (94) are distributed in scintillator envelope
It fills in substrate (92), metallic beryllium coating (93) is covered on scintillator package substrates (92) upper surface, and is fixed by welding in
In metal outer frame (91).
2. a kind of Wavelength conversion film for curved detector according to claim 1, which is characterized in that outside the metal
Frame (91) is flexible metal.
3. a kind of Wavelength conversion film for curved detector according to claim 2, which is characterized in that the scintillator
Package substrates (92) are transparent polymeric film, and upper surface is in alveolate cells by laser ablation, and each unit is positive six sides
Shape, scintillator cells (94) are distributed in these honeycomb regular hexagon units.
4. a kind of Wavelength conversion film for curved detector according to claim 3, which is characterized in that the scintillator
Unit (94) is sodium iodide.
5. a kind of Wavelength conversion film for curved detector according to claim 4, which is characterized in that the sodium iodide
For sodium iodide containing thallium.
6. a kind of curved detector, which is characterized in that including Wavelength conversion film (9), fixed cover (10), signal input port (5),
Fiber optic bundle (6), signal output port (7) and receiver port (8), the side that signal input port (5) receives x-ray have
Concaved circular cambered surface (52), concaved circular cambered surface (52) are adapted with the diffraction of x-ray diffraction circle (2), and Wavelength conversion film (9) passes through fixed cover
(10) it is mounted on concaved circular cambered surface (52), concaved circular cambered surface (52) is equipped with perforative accurate slit (51), in accurate slit (51)
By diffraction circle (2) radius extended line direction ordered arrangement installation fiber optic bundle (6) from top to bottom of x-ray diffraction, optical fiber is in radiation
Shape couples the end face of every optical fiber incidence end in fiber optic bundle (6) without spacing with Wavelength conversion film (9), the light of fiber optic bundle (6)
Fine exit end is connect with signal output port (7)；
Signal output port (7) is provided with perforative accurate slit (71), every fiber exit end in fiber optic bundle (6) by with enter
It penetrates and holds identical sequence is horizontally arranged to be from top to bottom mounted in accurate slit (71), arrange the exit end of all optical fiber linearly
Column, signal output port (7) and receiver port (8) are cooperatively connected；
Wavelength conversion film (9) covers the side of metallic beryllium towards x-ray, and the other side is covered on concaved circular cambered surface (52).
7. a kind of curved detector according to claim 6, which is characterized in that the extension line focus of the optical fiber (61) is
The center of circle of diffraction circle (2), optical fiber (61) is mounted in optical fiber installs fixture (53), so that every optical fiber in fiber optic bundle (6) enters
The end face for penetrating end is coupled with Wavelength conversion film (9) without spacing.
8. a kind of curved detector according to claim 7, which is characterized in that every optical fiber in the fiber optic bundle (6)
Cross-sectional area at least correspond to more than two scintillator encapsulation units.
9. a kind of curved detector according to claim 8, which is characterized in that receiver port (8) connection can
Light-exposed charge-coupled device.
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| CN109115817B (en) | 2019-09-27 |
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