CN110243848A - A kind of X-ray beam light stopper and its application method - Google Patents
A kind of X-ray beam light stopper and its application method Download PDFInfo
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- CN110243848A CN110243848A CN201910537335.XA CN201910537335A CN110243848A CN 110243848 A CN110243848 A CN 110243848A CN 201910537335 A CN201910537335 A CN 201910537335A CN 110243848 A CN110243848 A CN 110243848A
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- 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
- G01N23/201—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 by measuring small-angle scattering
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/05—Investigating materials by wave or particle radiation by diffraction, scatter or reflection
- G01N2223/054—Investigating materials by wave or particle radiation by diffraction, scatter or reflection small angle scatter
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The present invention provides a kind of X-ray beam light stopper and its application method, the light stopper includes ontology, scattering chamber, photoelectric conversion device accommodating chamber, photoelectric conversion device, bracket and current receiver, wherein, scattering chamber includes straight-through section and scattering section, straight-through section and the transition position for scattering section are equipped with a scattering surface, to stop the incident beam from straight-through section, and generates secondary fluor's signal and enter scattering section；Photoelectric conversion device is installed in photoelectric conversion device accommodating chamber, to receive secondary fluor's signal from scattering surface and be converted to current signal；Bracket is connected to ontology and covers photoelectric conversion device accommodating chamber；Current receiver is connect by signal wire with photoelectric conversion device, and the analog signal for exporting photoelectric conversion device is converted to digital signal.The present invention can be used for the intensity monitor that light beam line station carries out incident beam, have lesser size and higher photodiode service life, and can be with Automatic-searching incident beam center.
Description
Technical field
The invention belongs to synchrotron radiation field, it is related to a kind of X-ray beam light stopper and its application method.
Background technique
The Structure and Function of large biological molecule (mainly protein) is the key problem of current molecular biology
One of.Using synchrotron radiation Advance of Small-angle X-ray Scattering Technique, people can be to molecular weight under solution state from several KDa to a few MDa models
Sample in enclosing is studied, and obtains its structural information.This is just to study property, the conformation of protein molecular in the physiological state
Variation and the combination of protein molecular and other substrates provide powerful.Therefore, synchrotron radiation Advance of Small-angle X-ray Scattering Technique
It is receive more and more attention in recent years with the advantage that it is unique.
Biological sample small angle X ray scattering has scattered signal weak, and is highly prone to the influence of sample environment.These are influenced
It can cause absorption of the sample to X-ray, into the variation for causing scattered light intensity.Therefore it is needed during the experiment to transmitted light intensity
Precise measurement is carried out, and realizes data normalization using the intensity.Simultaneously as the intensity of straight-through light is far longer than scattering by force
Degree needs to stop straight-through light using light stopper.
Synchrotron Radiation is mainly tested using photodiode built-in in light beam light stopper in the world at present
The measurement of light intensity in the process.X-ray is converted into visible light using scintillator, is then measured by photodiode.This
Sample does not need additional measuring device, such as ionisation chamber, avoids the spuious generation penetrated.But the light that this method manufactures
The size-constrained size in photodiode of beam light stopper, it is difficult to accomplish 4mm or less.Simultaneously because third generation synchrotron radiation fills
The high-intensitive X-ray beam of generation is set, direct irradiation is easy to break photodiode, so that service life shortens.By dodging
Before bright body plus sheet metal attenuation portions light intensity can improve this problem, but can introduce new measurement error.Xu et al. utilizes light
Electrical effect monitors the intensity of straight-through light, does not need to carry out ionization meter using photodiode in this way, effectively reduces gear
The size of light device.It but needs to add additional driving voltage in measurement process.Blanchet et al. places photoelectricity by side
Diode, the photoelectron for receiving light stopper realizes the measurement of light intensity, has not only reduced the size of light stopper, but also does not need application volume
Outer voltage.
Due to the particularity at synchrotron radiation light beam line station, there is no universal architectures for light beam light stopper.Need the tool with line station
Body layout and control system combine, and redesign.
Summary of the invention
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of X-ray beam light stopper and
Its application method, for solving the problems, such as that X-ray beam light stopper size in the prior art is larger, parasitic scattering is higher.
In order to achieve the above objects and other related objects, the present invention provides a kind of X-ray beam light stopper, comprising:
Ontology；
Chamber is scattered, including straight-through section and scattering section, the straight-through section are open from the ontology one side, and past first direction
The body interior is extended to, the scattering section connects the straight-through section, and extends in the body interior toward second direction, institute
It states second direction to intersect with the first direction, the transition position of the straight-through section and the scattering section is equipped with one relative to described straight
The inclined scattering surface of extending direction of logical section, the scattering surface are generated to stop the incident beam from the straight-through section
Secondary fluor's signal enters the scattering section；
Photoelectric conversion device accommodating chamber is located at the body interior, and is connected to the scattering section；
Photoelectric conversion device is installed in the photoelectric conversion device accommodating chamber, to receive from the scattering surface
Secondary fluor's signal is simultaneously converted to current signal；
Bracket is connected to the ontology and covers the photoelectric conversion device accommodating chamber；
Current receiver is connect by signal wire with the photoelectric conversion device, is used for the photoelectric conversion device
The analog signal of output is converted to digital signal.
Optionally, the signal wire being connected to equipped with a signal wire accommodating chamber and one with the signal wire accommodating chamber in the bracket
Perforation, the width of the signal wire accommodating chamber are greater than the width of signal wire perforation, and the signal wire is by the photoelectric conversion
Device starting by the signal wire accommodating chamber, and passes through signal wire perforation and reaches the bracket outer.
Optionally, it is connected between the bracket and the ontology by fastener.
Optionally, the X-ray beam light stopper further includes two-dimensional movement platform, and the two-dimensional movement platform is connected to institute
Bracket or the main body are stated, to adjust the position of the X-ray beam light stopper, keeps the entrance alignment of the scattering chamber incident
Light beam.
Optionally, the X-ray beam light stopper further includes a control device, and the control device is for reading the electricity
The digital signal of flow receiving device output, and control the movement of the two-dimensional movement platform.
Optionally, the two-dimensional movement platform include support rod, motor vertical, motor vertical screw rod, motor vertical sliding block,
Motor vertical pedestal, horizontal motor, horizontal motor screw rod, horizontal motor sliding block and horizontal motor pedestal, wherein the support rod
First end be connected to the bracket or the ontology, the second end of the support rod is connected to the horizontal motor sliding block, institute
It states horizontal motor sliding block to be installed on the horizontal motor screw rod, the both ends of the horizontal motor screw rod are connected to the water
Flat telegram machine pedestal and the motor vertical sliding block, the horizontal motor are connected to the horizontal electricity by the horizontal motor pedestal
Machine screw rod to drive the horizontal motor screw rod according to adjustment signal, and then drives the horizontal motor sliding block, the level
Motor base is also attached to the motor vertical sliding block, and the motor vertical sliding block is installed on the motor vertical screw rod, institute
The both ends for stating motor vertical screw rod are connected to the opposite sides of the motor vertical pedestal, and the motor vertical passes through described
Motor vertical pedestal is connected to the motor vertical screw rod, to drive the motor vertical screw rod according to adjustment signal, in turn
Drive the motor vertical sliding block.
Optionally, the caliber of the straight-through section is less than 1mm.
Optionally, the material of the ontology includes at least one of tungsten, lead, cadmium and copper.
Optionally, the photoelectric conversion device includes photodiode.
Optionally, the current receiver includes pico-ampere table.
Optionally, the scattering surface is 30 ° -60 ° relative to the range of tilt angles of the extending direction of the straight-through section.
Optionally, the inlet of the scattering chamber has sloped sidewall, and the sloped sidewall is relative to the straight-through section
The range of tilt angles of extending direction is 30 ° -60 °.
Optionally, the light-blocking face diameter of the X-ray beam light stopper is less than 7mm.
The present invention also provides a kind of application methods of X-ray beam light stopper, comprising the following steps:
The coordinate at light beam line station and the coordinate of the X-ray beam light stopper are demarcated, determines relative zero and the X-ray
The moving direction of light beam light stopper；
Detect the light intensity of incident beam by the X-ray beam light stopper, and the mobile X-ray beam light stopper with
Obtain the light distribution of incident beam；
It records and is used as incident beam center at light intensity maximum value, and make the X-ray beam light stopper alignment incident beam
Center；
Light beam line station slit opening position and openings of sizes are adjusted to adjust the light intensity of incident beam.
Optionally, the moving direction of the X-ray beam light stopper includes the X-direction and phase vertical relative to incident beam
The Y-direction vertical for incident beam, and the X-direction is mutually perpendicular to the Y-direction.
As described above, X-ray beam light stopper of the invention can be used for the intensity monitor that light beam line station carries out incident beam,
The light stopper is directed to the light path layout at biological small-angle scattering line station, using heavy metal as light-locking material, can effectively block straight
Light passing, and using the quick and precisely measurement of the back scattering principle of heavy metal realization X-ray light intensity, photodiode is mounted on straight-through
The size of light stopper can be effectively reduced in the side of light, and the diameter in light-blocking face can be reduced to 3mm from the 7mm of existing apparatus, and can
It is further reduced 2mm.Since photodiode is not directly facing X-ray, photodiode can be greatly improved uses the longevity
Life.The present invention can also utilize two-dimensional movement platform Automatic-searching hot spot (light beam) center, in conjunction with control system, Ke Yishi
The existing automatic slit in light beam line station is adjusted, so that the automatic adjustment of incident beam light intensity is realized, to obtain ideal experimental state.This
Outside, the beam inlet of X-ray beam light stopper of the invention uses oblique angle, can effectively reduce parasitic scattering.
Detailed description of the invention
Fig. 1 is shown as the structural schematic diagram of X-ray beam light stopper of the invention.
Fig. 2-Fig. 3 is shown as the schematic diagram of ontology described in X-ray beam light stopper of the invention.
Fig. 4 is shown as the schematic diagram of bracket described in X-ray beam light stopper of the invention.
Fig. 5 is shown as the schematic diagram of two-dimensional movement platform described in X-ray beam light stopper of the invention.
Fig. 6 be shown as X-ray beam light stopper of the invention it is light-blocking when schematic diagram.
Fig. 7 be shown as a kind of larger size X-ray beam light stopper it is light-blocking when schematic diagram.
Fig. 8 is shown as the light distribution that X-ray beam light stopper of the invention scans in X direction.
Fig. 9 is shown as the light distribution that X-ray beam light stopper of the invention is scanned along Y-direction.
Figure 10 is shown as the flow chart of the application method of X-ray beam light stopper of the invention.
Component label instructions
1 ontology
2 scattering chambers
2a leads directly to section
2b scatters section
3 scattering surfaces
4 incident beams
5 secondary fluor's signals
6 photoelectric conversion device accommodating chambers
7 photoelectric conversion devices
8 brackets
9 fasteners
10 signal wire accommodating chambers
The perforation of 11 signal wires
12 current receivers
13 two-dimensional movement platforms
13a support rod
13b motor vertical
13c motor vertical screw rod
13d motor vertical sliding block
13e motor vertical pedestal
13f horizontal motor
13g horizontal motor screw rod
13h horizontal motor sliding block
13i horizontal motor pedestal
14 control devices
15 grooves
16,17 mounting hole
18 signal wires
M leads directly to the extending direction of section
The extending direction of N scattering section
The tilt angle of A scattering surface
The sidewall slope angle of B scattering chamber entrance
The width of S signal wire accommodating chamber
The width of T signal wire perforation
D caliber
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.
Fig. 1 is please referred to Figure 10.It should be noted that diagram provided in the present embodiment only illustrates this in a schematic way
The basic conception of invention, only shown in schema then with related component in the present invention rather than package count when according to actual implementation
Mesh, shape and size are drawn, when actual implementation kenel, quantity and the ratio of each component can arbitrarily change for one kind, and its
Assembly layout kenel may also be increasingly complex.
Embodiment one
The present invention provides a kind of X-ray beam light stopper, referring to Fig. 1, being shown as the structure of the X-ray beam light stopper
Schematic diagram, including ontology 1, scattering chamber 2, photoelectric conversion device accommodating chamber 6, photoelectric conversion device 7, bracket 8 and current receiv dress
Set 12, wherein the scattering chamber 2 includes straight-through section and scattering section, and the straight-through section be open from the ontology one side, and past the
One direction extends to the body interior, and the scattering section connects the straight-through section, and in the body interior toward second direction
Extend, the second direction is intersected with the first direction, and it is opposite that the transition position of the straight-through section and the scattering section is equipped with one
In the inclined scattering surface 3 of the extending direction of the straight-through section, the scattering surface 3 is to stop the incident light from the straight-through section
Beam 4, and generate secondary fluor's signal 5 and enter the scattering section；The photoelectric conversion device accommodating chamber 6 is located in the ontology
Portion, and be connected to the scattering section；The photoelectric conversion device 7 is installed in the photoelectric conversion device accommodating chamber 6, to connect
It receives secondary fluor's signal 5 from the scattering surface 3 and is converted to current signal；The bracket 8 is connected to the ontology 1
And the photoelectric conversion device accommodating chamber 6 is covered, the current receiver 12 is filled by signal wire 18 and the photoelectric conversion
7 connections are set, the analog signal for exporting the photoelectric conversion device 7 is converted to digital signal.
As an example, the ontology 1 uses heavy metal as light-locking material, straight-through light, material packet can be effectively blocked
Include but be not limited at least one of tungsten, lead, cadmium and copper.When the irradiation of X-ray incident beam is in the metal inner surface of the ontology 1
(the mainly described scattering surface 3) can make the low-lying level electron transition of metal to high level, electronics can be generated during falling after rise with
The directly proportional secondary fluor's signal (back scattering) of incident intensity, the photoelectric conversion device 7 can receive secondary fluor's signal simultaneously
It is converted into current signal, the size of current signal can reflect the size of X-ray incident intensity.Due to the photoelectric conversion device 7
Only one receiving plane, extra back scattering can scatter in the scattering chamber 2, finally by the metal inner surface of the scattering chamber 2
It absorbs.
As an example, the photoelectric conversion device 7 includes but is not limited to photodiode.The current receiver includes
But it is not limited to pico-ampere table, the current signal of Naan magnitude can be measured.
Referring to Fig. 2, being shown as the structural schematic diagram of the ontology 1, the extension side of the straight-through section 2a is shown
To the extending direction N of M and the scattering section 2b.In the present embodiment, the extending direction M of the straight-through section prolongs with the scattering section
It is vertical to stretch direction N, in other embodiments, the extending direction N of the extending direction M of the straight-through section and the scattering section can also be with
In other intersecting angles, should not excessively limit the scope of the invention herein.
Referring to Fig. 3, being shown as the structural schematic diagram of the ontology 1, the tilt angle of the scattering surface 3 is shown
A.As an example, the range of the tilt angle A of the scattering surface is 30 ° -60 °, it is preferably 30 ° in the present embodiment, is conducive to light
Electronics is absorbed by photodiode.
The caliber D of the straight-through section 2a is also shown in Fig. 3, as an example, the caliber D of the straight-through section 2a is less than 1mm.
In the present embodiment, the circular in cross-section of the straight-through section 2a, caliber described herein refers to diameter.In other embodiments,
The cross section of the straight-through section 2a can also be in other shapes, should not excessively limit the scope of the invention herein.
Please continue to refer to Fig. 3, the inlet of the scattering chamber 2 has sloped sidewall, relative to prolonging for the straight-through section
Direction inclination is stretched, spuious can be penetrated to avoid extra.The sidewall slope angle B of the scattering chamber entrance is shown in Fig. 3.As
The range of example, the sidewall slope angle B of the scattering chamber entrance is 30 ° -60 °, is preferably 45 ° in the present embodiment, Ke Yiyou
Effect reduces parasitic scattering.
Referring to Fig. 4, being shown as the structural schematic diagram of the bracket 8, a signal wire accommodating chamber 10 is equipped in the bracket 8
And the signal wire perforation 11 that is connected to the signal wire accommodating chamber 10, the width S of the signal wire accommodating chamber 10 is greater than described
The width T of signal wire perforation 11.As shown in Figure 1, the signal wire 18 is originated by the photoelectric conversion device 7, by the letter
Number line accommodating chamber 10, and pass through signal wire perforation 11 and reach outside the brackets 8.The signal wire 18 includes at least positive electricity
Pole lead and negative electrode lead.It is described in order to avoid leakage since the bracket 8 can also stop a part of scattered signal
The size of signal wire perforation 11 is the smaller the better, and in the present embodiment, diameter is by taking 2mm as an example.
As an example, being connected between the bracket 8 and the ontology 1 by fastener 9 (such as screw), the bracket 8
It cooperates with the ontology 1, a closed cavity is formed, with the fixation photoelectric conversion device 7 and the ontology.It is described
The material of bracket 8 includes but is not limited to stainless steel.Groove 15 is equipped in the present embodiment, in the ontology 1 (such as Fig. 2 and Fig. 3 institute
Show), in at least a part of insertion groove 15 of the bracket 8 (as shown in Figure 1), the side wall of the groove equipped with it is described
The mounting hole 16 that fastener 9 matches, the side wall of the bracket 8 are equipped with the mounting hole 17 matched with the fastener 9.
Certainly, in other embodiments, the bracket 8 also uses other fixed forms with the ontology 1, herein not
It should excessively limit the scope of the invention.
Please referring back to Fig. 1, the X-ray beam light stopper further includes two-dimensional movement platform 13, and the two-dimensional movement is flat
Platform 13 is connected to the bracket 8 or the main body 1, to adjust the position of the X-ray beam light stopper, makes the scattering chamber
2 entrance is directed at incident beam 4.
Referring to Fig. 5, being shown as the structural schematic diagram of the two-dimensional movement platform 13, the two-dimensional movement platform 13 includes
Support rod 13a, motor vertical 13b, motor vertical screw rod 13c, motor vertical sliding block 13d, motor vertical pedestal 13e, horizontal electricity
Machine 13f, horizontal motor screw rod 13g, horizontal motor sliding block 13h and horizontal motor pedestal 13i, wherein the of the support rod 13a
One end is connected to the bracket 8 or the ontology 1, and the second end of the support rod 13a is connected to the horizontal motor sliding block
13h, the horizontal motor sliding block 13h are installed on the horizontal motor screw rod 13g, the both ends of the horizontal motor screw rod 13g
It is connected to the horizontal motor pedestal 13i and the motor vertical sliding block 13d, the horizontal motor 13f passes through the water
Flat telegram machine pedestal 13i is connected to the horizontal motor screw rod 13g, to drive the horizontal motor screw rod according to adjustment signal
13g, and then the horizontal motor sliding block 13h, the horizontal motor pedestal 13i is driven to be also attached to the motor vertical sliding block
13d, the motor vertical sliding block 13d are installed on the motor vertical screw rod 13c, the both ends of the motor vertical screw rod 13c
It is connected to the opposite sides of the motor vertical pedestal 13e, the motor vertical 13b passes through the motor vertical pedestal
13e is connected to the motor vertical screw rod 13c, to drive the motor vertical screw rod 13c according to adjustment signal, and then drives
The motor vertical sliding block 13d.
As an example, the first end of the support rod 13a is connected to the bracket 8 by welding manner.In other implementations
In example, other connection types can also be used between the support rod 13a and the bracket 8 or the ontology 1, it herein should not mistake
Divide and limits the scope of the invention.
As an example, the horizontal motor 13f and the motor vertical 13b are all made of step motion mode, to facilitate
State X-ray beam light stopper in the horizontal direction or the light distribution of vertical scan direction incident beam.
Please referring back to Fig. 1, the X-ray beam light stopper further includes a control device 14, such as computer, the control
Device 14 processed is used to read the digital signal that the current receiver 12 exports, and issues corresponding adjustment signal to control
State the movement of two-dimensional movement platform 13.In the present embodiment, the horizontal motor 13f and motor vertical of the two-dimensional movement platform 13
13b is all connected to the control device 14, and the current receiver 12 is connected to (by taking pico-ampere table as an example) by RS232 serial ports
The control device 14.
In the present invention, the photoelectric conversion device 7 is mounted on the side of straight-through light, will not influence the size of light-receiving surface.
Due to the interference of no photoelectric conversion device 7, the size of light stopper can substantially reduce, until 3mm, and can be further reduced
To 2mm, so that the minimum angle of detection is substantially reduced.According to reciprocal relation, the particle size that small-angle scattering can be made to detect
It doubles.
Fig. 6 and Fig. 7 is please referred to, shows schematic diagram when X-ray beam light stopper of the invention is light-blocking and routine respectively
Schematic diagram when larger size X-ray beam light stopper is light-blocking, wherein the light-blocking face of X-ray beam light stopper of the invention is straight
Diameter is 3mm, and the light-blocking face diameter (7mm) relative to conventional light stopper significantly reduces.Further, since the photoelectric conversion device
7, not directly facing X-ray, can be greatly improved the service life of the photoelectric conversion device 7.
The X-ray beam light stopper of the present embodiment can be used for the intensity monitor that light beam line station carries out incident beam, this is light-blocking
The light path layout that device is directed to biological small-angle scattering line station can effectively block straight-through light using heavy metal as light-locking material, and
The quick and precisely measurement of X-ray light intensity is realized using the back scattering principle of heavy metal, photodiode is mounted on the side of straight-through light
The size of light stopper can be effectively reduced in face, and the diameter in light-blocking face can be reduced to 3mm from the 7mm of existing apparatus, and can be further
It is reduced to 2mm.Since photodiode is not directly facing X-ray, the service life of photodiode can be greatly improved.This hair
It is bright light beam to may be implemented in conjunction with control system using two-dimensional movement platform Automatic-searching hot spot (light beam) center
The automatic slit in line station is adjusted, so that the automatic adjustment of incident beam light intensity is realized, to obtain ideal experimental state.In addition, this
The beam inlet of the X-ray beam light stopper of invention uses oblique angle, can effectively reduce parasitic scattering.
Embodiment two
A kind of application method of X-ray beam light stopper is provided in the present embodiment, utilizes the X-ray beam in embodiment one
Light stopper carries out intensity monitor, referring to Fig. 8, being shown as the flow chart of this method, comprising the following steps:
S1: the coordinate at calibration light beam line station and the coordinate of the X-ray beam light stopper determine relative zero and the X
The moving direction of ray beam light stopper；
S2: the light intensity of incident beam is detected by the X-ray beam light stopper, and the mobile X-ray beam is light-blocking
Device is to obtain the light distribution of incident beam；
S3: being used as incident beam center at record light intensity maximum value, and makes the X-ray beam light stopper alignment incident light
Beam center；
S4: light beam line station slit opening position and openings of sizes are adjusted to adjust the light intensity of incident beam.
Specifically, the X-ray beam light stopper is mounted on light beam line station, wherein experiment station needs to utilize slit pair
Spot size is limited, to obtain ideal experimental state.It can determine the phase of slit and light stopper in the controls
To zero point and moving direction, light beam (hot spot) center (at light intensity maximum value) then is obtained by scanning light stopper, then
The automatic adjustment of light intensity can be realized by adjusting slit opening position and size according to pre-set programs.
As an example, incident light is parallel to the horizontal plane, X, Y are the both direction perpendicular to incident light, and wherein X represents level
Direction, Y represent vertical direction.Utilize the fortune of horizontal motor and motor vertical in control device control two-dimensional movement platform
It is dynamic, can control the movement of the horizontal motor screw rod Yu the motor vertical screw rod, thus allow the horizontal motor sliding block and
The motor vertical slide block movement drives the support rod to move, and then the mobile X-ray beam light stopper, penetrates the X
Line beam light stopper goes to receive straight-through light.Light beam light stopper is mainly used for light beam line station and carries out intensity monitor, therefore works as its center
When being directed at incident beam center, so that it may persistently carry out intensity monitor, export electric current.Its current value can be by electric with X-ray
Output from room is demarcated, and intensity signal is reacted.
As an example, it is 12keV, spot size that experiment condition when finding spot center position, which includes: incident laser energy,
For 0.3mm*0.1mm, light stopper center opening is 1mm or less.Please refer to Fig. 9 and Figure 10, wherein Fig. 9 is shown as light stopper edge
Horizontal direction (X-direction) scans the light distribution (scattergram) come and the bell distribution curve (line obtained by Gauss curve fitting
Figure), Figure 10 is shown as light stopper and vertically (Y-direction) scans the light distribution (scattergram) come and pass through Gauss curve fitting
Obtained bell distribution curve (line chart).As it can be seen that the maximum value of light intensity can be found by two-dimensional movement platform.
In conclusion X-ray beam light stopper of the invention can be used for the intensity monitor that light beam line station carries out incident beam,
The light stopper is directed to the light path layout at biological small-angle scattering line station, using heavy metal as light-locking material, can effectively block straight
Light passing, and using the quick and precisely measurement of the back scattering principle of heavy metal realization X-ray light intensity, photodiode is mounted on straight-through
The size of light stopper can be effectively reduced in the side of light, and the diameter in light-blocking face can be reduced to 3mm from the 7mm of existing apparatus, and can
It is further reduced 2mm.Since photodiode is not directly facing X-ray, photodiode can be greatly improved uses the longevity
Life.The present invention can also utilize two-dimensional movement platform Automatic-searching hot spot (light beam) center, in conjunction with control system, Ke Yishi
The existing automatic slit in light beam line station is adjusted, so that the automatic adjustment of incident beam light intensity is realized, to obtain ideal experimental state.This
Outside, the beam inlet of X-ray beam light stopper of the invention uses oblique angle, can effectively reduce parasitic scattering.So the present invention has
Effect overcomes various shortcoming in the prior art and has high industrial utilization value.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (15)
1. a kind of X-ray beam light stopper characterized by comprising
Ontology；
Chamber is scattered, including straight-through section and scattering section, the straight-through section are open from the ontology one side, and extend toward first direction
To the body interior, the scattering section connects the straight-through section, and in the body interior toward second direction extension, and described the
Two directions intersect with the first direction, and the transition position of the straight-through section and the scattering section is equipped with one relative to the straight-through section
The inclined scattering surface of extending direction, the scattering surface generates secondary to stop the incident beam from the straight-through section
Fluorescence signal enters the scattering section；
Photoelectric conversion device accommodating chamber is located at the body interior, and is connected to the scattering section；
Photoelectric conversion device is installed in the photoelectric conversion device accommodating chamber, to receive from described in the scattering surface
Secondary fluor's signal is simultaneously converted to current signal；
Bracket is connected to the ontology and covers the photoelectric conversion device accommodating chamber；
Current receiver is connect, for exporting the photoelectric conversion device with the photoelectric conversion device by signal wire
Analog signal be converted to digital signal.
2. X-ray beam light stopper according to claim 1, it is characterised in that: be equipped with a signal wire in the bracket and receive
Cavity and the signal wire perforation that is connected to the signal wire accommodating chamber, the width of the signal wire accommodating chamber are greater than the signal
The width of line perforation, the signal wire is originated by the photoelectric conversion device, by the signal wire accommodating chamber, and is passed through described
Signal wire perforation reaches the bracket outer.
3. X-ray beam light stopper according to claim 1, it is characterised in that: lead between the bracket and the ontology
Cross fastener connection.
4. X-ray beam light stopper according to claim 1, it is characterised in that: the X-ray beam light stopper further includes
Two-dimensional movement platform, the two-dimensional movement platform are connected to the bracket or the main body, to adjust the X-ray beam gear
The position of light device makes the entrance alignment incident beam of the scattering chamber.
5. X-ray beam light stopper according to claim 4, it is characterised in that: the X-ray beam light stopper further includes
One control device, the control device are used to read the digital signal of the current receiver output, and control the two dimension
The movement of mobile platform.
6. X-ray beam light stopper according to claim 4, it is characterised in that: the two-dimensional movement platform includes support
Bar, motor vertical, motor vertical screw rod, motor vertical sliding block, motor vertical pedestal, horizontal motor, horizontal motor screw rod, level
Motor sliding block and horizontal motor pedestal, wherein the first end of the support rod is connected to the bracket or the ontology, the branch
The second end of strut is connected to the horizontal motor sliding block, and the horizontal motor sliding block is installed on the horizontal motor screw rod,
The both ends of the horizontal motor screw rod are connected to the horizontal motor pedestal and the motor vertical sliding block, the horizontal electricity
Machine is connected to the horizontal motor screw rod by the horizontal motor pedestal, to drive the horizontal motor according to adjustment signal
Screw rod, and then the horizontal motor sliding block is driven, the horizontal motor pedestal is also attached to the motor vertical sliding block, described to hang down
Straight motor sliding block is installed on the motor vertical screw rod, and the both ends of the motor vertical screw rod are connected to the vertical electricity
The opposite sides of machine pedestal, the motor vertical are connected to the motor vertical screw rod by the motor vertical pedestal, to
The motor vertical screw rod is driven according to adjustment signal, and then drives the motor vertical sliding block.
7. X-ray beam light stopper according to claim 1, it is characterised in that: the caliber of the straight-through section is less than 1mm.
8. X-ray beam light stopper according to claim 1, it is characterised in that: the material of the ontology include tungsten, lead,
At least one of cadmium and copper.
9. X-ray beam light stopper according to claim 1, it is characterised in that: the photoelectric conversion device includes photoelectricity
Diode.
10. X-ray beam light stopper according to claim 1, it is characterised in that: the current receiver includes pico-ampere
Table.
11. X-ray beam light stopper according to claim 1, it is characterised in that: the scattering surface is relative to described straight-through
The range of tilt angles of the extending direction of section is 30 ° -60 °.
12. X-ray beam light stopper according to claim 1, it is characterised in that: the inlet of the scattering chamber, which has, inclines
Oblique side wall, the sloped sidewall are 30 ° -60 ° relative to the range of tilt angles of the extending direction of the straight-through section.
13. X-ray beam light stopper according to claim 1, it is characterised in that: the gear of the X-ray beam light stopper
Smooth surface diameter is less than 7mm.
14. a kind of application method of the X-ray beam light stopper as described in claim 1-13 any one, which is characterized in that
The following steps are included:
The coordinate at light beam line station and the coordinate of the X-ray beam light stopper are demarcated, determines relative zero and the X-ray beam
The moving direction of light stopper；
The light intensity of incident beam is detected by the X-ray beam light stopper, and the mobile X-ray beam light stopper is to obtain
The light distribution of incident beam；
It records and is used as incident beam center at light intensity maximum value, and make X-ray beam light stopper alignment incident beam center；
Light beam line station slit opening position and openings of sizes are adjusted to adjust the light intensity of incident beam.
15. the application method of X-ray beam light stopper according to claim 14, it is characterised in that: the X-ray beam
The moving direction of light stopper includes the X-direction vertical relative to incident beam and the Y-direction vertical relative to incident beam, and institute
X-direction is stated to be mutually perpendicular to the Y-direction.
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| CN201910537335.XA CN110243848B (en) | 2019-06-20 | 2019-06-20 | X-ray beam light barrier and using method thereof |
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| CN201910537335.XA CN110243848B (en) | 2019-06-20 | 2019-06-20 | X-ray beam light barrier and using method thereof |
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| CN110243848B CN110243848B (en) | 2022-04-01 |
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| CN110243848B (en) | 2022-04-01 |
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