CN109671513A - The continuously adjustable neutron howitzer structure of the angle of divergence and its scaling method - Google Patents
The continuously adjustable neutron howitzer structure of the angle of divergence and its scaling method Download PDFInfo
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- CN109671513A CN109671513A CN201811618906.4A CN201811618906A CN109671513A CN 109671513 A CN109671513 A CN 109671513A CN 201811618906 A CN201811618906 A CN 201811618906A CN 109671513 A CN109671513 A CN 109671513A
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- G—PHYSICS
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- G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
- G21K1/00—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating
- G21K1/02—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators
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Abstract
The neutron howitzer structure and its scaling method being continuously adjusted the invention discloses a kind of angle of divergence, if neutron howitzer structure includes: that dry plate neutron absorbing layer is arranged in parallel, the upper and lower of every neutron absorbing layer is respectively and fixedly provided with adjustment column；Sliding block is adjusted, is a hollow mount structure, if being set to outside dry plate neutron absorbing layer；Wherein, the upper and lower surfaces of the adjustment sliding block are provided with the adjustment tank with neutron absorbing layer corresponding number, and the spacing between each adjustment tank is in graded profile along neutron absorbing layer direction disposed in parallel, and the adjustment column of neutron absorbing layer protrudes into the adjustment tank；And driving structure makes the spacing of neutron absorbing layer change, to realize continuously adjusting for the neutron angle of divergence for driving the adjustment sliding block to be moved along neutron absorbing layer direction disposed in parallel to change adjustment column the location of in adjustment tank.The structure can realize that the angle of divergence adjusts on demand, meet various neutron experiments requirements, save neutron streaming time and funds.
Description
Technical field
The disclosure belongs to neutron optics device, is related to a kind of neutron howitzer structure and its calibration that the angle of divergence is continuously adjustable
Method, it is especially a kind of that the continuously adjustable neutron howitzer structure of the angle of divergence is realized based on change neutron-absorbing interlamellar spacing, and
The scaling method of the angle of divergence of the neutron howitzer structure.
Background technique
Neutron scattering spectrometer be using the neutron of a large amount of different-energies of the generations such as reactor, spallation source as neutron source,
The neutron for therefrom selecting certain energy is incident on studied sample, by detecting the parameters such as outgoing neutron energy, momentum, with
Realize the instrument of the research to the stress of sample, texture, microstructure, magnetic dependence performance etc..
Since the neutron that reactor or spallation source generate is scattered to 4 directions π, lead to the neutron streaming drawn from duct diverging
Angle is very big, and the measurement of momentum change needs incident neutron to have determining direction, thus neutron scattering spectrometer generally requires use
Neutron howitzer improves its resolution ratio to reach, promotes the purpose of signal-to-noise ratio to limit the direction of incident neutron.It is general next
It says, neutron scattering spectrometer needs the neutron howitzer using the different neutron angles of divergence to carry out different types of experiment measurement.
The neutron angle of divergence of neutron howitzer used at present is just had determined in production, cannot be according to using
Demand is adjusted；In addition, neutron howitzer is generally placed inside shield, different divergings cannot be replaced according to demand at any time
The collimator at angle.Therefore in order to complete different neutron experiments, current general neutron spectrometer can be pre-installed several in shield
The neutron howitzer of the common angle of divergence, but since shield inner space is limited, required various collimators can not be installed, still
All neutron experiments requirements are unable to satisfy, and replaces collimator and needs the long period while buying the standard of a variety of different models
Straight device needs a large amount of funds.
Therefore, it is necessary to a kind of neutron howitzer structure that can continuously adjust the angle of divergence be proposed, in a neutrons collimation
Continuously adjusting for the neutron angle of divergence can be achieved in device, then do not need that multiple neutron howitzers with the different angles of divergence are installed,
The adjustment that the angle of divergence is carried out according to actual demand can be realized in a neutron howitzer structure, meeting various neutron experiments makes
With requiring, to avoid in shield prepackage containing there are many cumbersome, the sections of the trouble of the neutron howitzer of the angle of divergence and replacement
About valuable neutron streaming time and funds.
Summary of the invention
(1) technical problems to be solved
The neutron howitzer structure and its scaling method being continuously adjusted present disclose provides a kind of angle of divergence, at least partly
Solve technical problem set forth above.
(2) technical solution
According to one aspect of the disclosure, a kind of neutron howitzer structure that the angle of divergence is continuously adjustable is provided, comprising: if
Dry plate neutron absorbing layer 2 is arranged in parallel, and the upper and lower of every neutron absorbing layer 2 is respectively and fixedly provided with adjustment column 3；Sliding block 4 is adjusted, is
One hollow mount structure, if being set to outside dry plate neutron absorbing layer 2；Wherein, the upper and lower surfaces of the adjustment sliding block 4 are provided with
With the adjustment tank 5 of 2 corresponding number of neutron absorbing layer, the spacing between each adjustment tank 5 is disposed in parallel along neutron absorbing layer
Direction is in graded profile, and the adjustment column 3 of neutron absorbing layer 2 protrudes into the adjustment tank 5；And driving structure, for driving the tune
Whole sliding block 4 is moved along the direction disposed in parallel of neutron absorbing layer 2, to change the position locating in adjustment tank 5 of adjustment column 3
Setting makes the spacing of neutron absorbing layer 2 change, to realize continuously adjusting for the neutron angle of divergence.
In some embodiments of the present disclosure, adjustment sliding block 4 is installed on sliding rail 6, can be moved along sliding rail 6；It adjusts
Whole sliding block 4 is connect with one with forward and reverse thread lead screw 7, under the action of driving structure, adjusts sliding block 4 with forward and reverse screw thread silk
It moves on thick stick 7 to realize moving along sliding rail 6.
In some embodiments of the present disclosure, sliding rail 6 is fixed on fixed bracket 8；It is fixed on forward and reverse thread lead screw 7
On fixed bracket 8；Every neutron absorbing layer 2 is installed on neutron absorbing layer frame 1, each neutron absorbing layer frame 1 it is upper and lower
Fang Jun is fixedly installed adjustment column 3, and neutron absorbing layer frame 1 is connected with fixed bracket 8.
In some embodiments of the present disclosure, the continuously adjustable neutron howitzer structure of the angle of divergence, further includes: positioning knot
Structure, for adjusting the positioning of sliding block 4.
In some embodiments of the present disclosure, location structure is absolute encoder, which is installed on fixed branch
On frame 8.
In some embodiments of the present disclosure, the continuously adjustable neutron howitzer structure of the angle of divergence, further includes: motion control
System realizes the mobile control to adjustment sliding block 4 by control driving structure；And data collection system, for acquiring data,
The data include neutron diverging angle information and the location information for adjusting sliding block 4.
In some embodiments of the present disclosure, driving structure is servo motor, which is installed on fixed bracket 8
On.
In some embodiments of the present disclosure, the number of adjustment sliding block 4 is 2, and two adjustment sliding blocks 4 are oppositely arranged, and two
The distribution of adjustment tank 5 on a adjustment sliding block 4 is symmetrical along the axis of orientation of 2 normal of neutron absorbing layer.
A kind of scaling method of the angle of divergence another aspect of the present disclosure provides, is mentioned for demarcating the disclosure
Any neutron howitzer structure, which includes: that adjustment sliding block 4 is moved to a certain position, and records adjustment
The position of sliding block 4 and the corresponding neutron angle of divergence；And the corresponding neutron diverging of different location is in by obtaining adjustment sliding block 4
Angle obtains the angle of divergence of the neutron howitzer structure and the corresponding relationship curve of adjustment 4 position of sliding block, realizes calibration.
In some embodiments of the present disclosure, the position of adjustment sliding block 4 is determined by location structure；It is acquired by data and is
The position of system record adjustment sliding block 4 and the corresponding neutron angle of divergence；Adjustment sliding block 4 is controlled by kinetic control system to be moved to not
Same position.
(3) beneficial effect
It can be seen from the above technical proposal that the continuously adjustable neutron howitzer structure of the angle of divergence that provides of the disclosure and its
Scaling method has the advantages that
(1) it in industry provides for the first time a kind of based on changing during neutron-absorbing interlamellar spacing realizes that the angle of divergence is continuously adjustable
Sub- collimator structure, by the way that moveable adjustment sliding block is arranged, the adjustment tank of setting spacing graded profile on adjustment sliding block should
If adjustment tank is corresponding with dry plate neutron absorbing layer disposed in parallel, the adjustment column (fixed) on every neutron absorbing layer is being adjusted
During whole sliding block mobile (adjustment sliding block is mobile), adjustment column corresponds to the different location of adjustment tank, to change neutron incidence side
To corresponding neutron-absorbing interlamellar spacing, continuously adjusting for the neutron angle of divergence is realized, it can be real in a neutron howitzer structure
The adjustment that the angle of divergence is now carried out according to actual demand, meets various neutron experiments requirements, in practical applications can be significantly
The replacement frequency of collimator is reduced to save the valuable neutron streaming time, at the same the quantity of collimator needed for reducing to
It saves and largely purchases funds；
(2) by two adjustment sliding blocks of setting, and it is oppositely arranged two adjustment sliding blocks, i.e., the tune on two adjustment sliding blocks
Whole slot distribution is symmetrical along the axis of orientation of neutron absorbing layer normal, has advanced optimized the adjustment of neutron-absorbing interlamellar spacing just
Benefit and accuracy；
(3) kinetic control system can by computer remote control driving structure (such as servo motor) precise rotation to
The position of moveable adjustment sliding block is accurately controlled, and then reaches the work for adjusting the neutron angle of divergence of neutron howitzer structure
With.
Detailed description of the invention
Fig. 1 is the neutron howitzer structural schematic diagram that the angle of divergence according to shown in one embodiment of the disclosure is continuously adjusted.
Fig. 2 is the structural schematic diagram of a piece of neutron absorbing layer in neutron howitzer structure as shown in Figure 1.
Fig. 3 is the top view of the adjustment sliding block in neutron howitzer structure as shown in Figure 1.
Fig. 4 is the schematic perspective view that sliding block is adjusted according to shown in one embodiment of the disclosure.
Fig. 5 is that the neutron howitzer structure that the angle of divergence according to shown in one embodiment of the disclosure is continuously adjusted realizes that neutron is inhaled
Receive the schematic illustration that interlamellar spacing continuously adjusts.
[symbol description]
1- neutron absorbing layer frame；2- neutron absorbing layer；
3- adjustment column；4- adjusts sliding block；
5- adjustment tank；6- sliding rail；
7- is with forward and reverse thread lead screw；8- fixes bracket；
9- servo motor and encoder.
Specific embodiment
The neutron howitzer structure and its scaling method being continuously adjusted present disclose provides a kind of angle of divergence, can by setting
Mobile adjustment sliding block, adjustment sliding block on be arranged spacing graded profile adjustment tank, the adjustment tank with it is disposed in parallel several
Piece neutron absorbing layer is corresponding, and the adjustment column (fixed) on every neutron absorbing layer is in mobile (the adjustment sliding block shifting of adjustment sliding block
It is dynamic) during, adjustment column corresponds to the different location of adjustment tank, to change the corresponding neutron-absorbing interlayer of neutron incident direction
Away from continuously adjusting for the realization neutron angle of divergence can be realized in a neutron howitzer structure and be sent out according to actual demand
The adjustment for dissipating angle, meets various neutron experiments requirements.
For the purposes, technical schemes and advantages of the disclosure are more clearly understood, below in conjunction with specific embodiment, and reference
The disclosure is further described in attached drawing.In the disclosure, the meaning of " adjustment sliding block is oppositely arranged " refers on adjustment sliding block
Adjustment tank is symmetrical in mirror surface；Term " adjustment column " and " adjustment tank " are corresponding setting, and the two has one opposite fortune occurs
Dynamic, in some embodiments, " adjustment column " itself will not move, and " adjustment tank " can be realized and be moved with " adjustment sliding block ",
To which the relative position of " adjustment column " and both " adjustment tank " changes, the function of adjustment neutron-absorbing interlamellar spacing is realized.
In first exemplary embodiment of the disclosure, a kind of neutron howitzer knot that the angle of divergence is continuously adjustable is provided
Structure.
Fig. 1 is the neutron howitzer structural schematic diagram that the angle of divergence according to shown in one embodiment of the disclosure is continuously adjusted.
Shown in referring to Fig.1, the continuously adjustable neutron howitzer structure of the angle of divergence of the disclosure, comprising: if dry plate neutron is inhaled
It receives layer 2 to be arranged in parallel, the upper and lower of every neutron absorbing layer 2 is respectively and fixedly provided with adjustment column 3；Sliding block 4 is adjusted, is empty frames knot in one
Structure, if being set to outside dry plate neutron absorbing layer 2；Wherein, the upper and lower surfaces of the adjustment sliding block 4 are provided with and neutron-absorbing
The adjustment tank 5 of 2 corresponding number of layer, spacing between each adjustment tank 5 are in gradual change along neutron absorbing layer direction disposed in parallel
Distribution, the adjustment column 3 of neutron absorbing layer 2 protrude into the adjustment tank 5；And driving structure, for drive the adjustment sliding block 4 along
The direction disposed in parallel of neutron absorbing layer 2 is moved, and inhales neutron to change adjustment column 3 the location of in adjustment tank 5
The spacing for receiving layer 2 changes, to realize continuously adjusting for the neutron angle of divergence.
Wherein, the piece number of neutron absorbing layer 2 is arranged accordingly according to actual needs, and the disclosure does not limit neutron-absorbing
The number of layer, certainly, skilled person will appreciate that, neutron absorbing layer is at least 2.
In a preferred embodiment, the number for adjusting sliding block 4 is 2, and two adjustment sliding blocks 4 are oppositely arranged, and two adjustment
The distribution of adjustment tank 5 on sliding block 4 is symmetrical along the axis of orientation of 2 normal of neutron absorbing layer, as shown in Figure 1 and Figure 5.
It is discussed in detail the continuously adjustable neutron howitzer of the angle of divergence shown in embodiment of the disclosure with reference to the accompanying drawing
The principle that the various pieces and the realization angle of divergence of structure continuously adjust.
Fig. 2 is the structural schematic diagram of a piece of neutron absorbing layer in neutron howitzer structure as shown in Figure 1.
Referring to shown in Fig. 2, in the present embodiment, every neutron absorbing layer 2 is installed on neutron absorbing layer frame 1, and neutron is inhaled
It receives layer frame 1 to play the role of supporting and fixing neutron absorbing layer 2, neutron absorbing layer frame 1 is connected with fixed bracket 8.Often
The upper and lower of a neutron absorbing layer frame 1 is fixedly installed adjustment column 3, the opposite position between the adjustment column 3 and adjustment tank 5
The distance between each neutron absorbing layer 2 can be adjusted by setting change.With 2 adjustment sliding blocks, every neutron absorbing layer 2 in Fig. 1 and Fig. 2
Upper and lower be respectively and fixedly provided with two adjustment columns 3 and illustrated, in practical devices structure, can flexibly be set as needed
It sets, the disclosure does not limit the number of adjustment sliding block and adjustment column.
Fig. 3 is the top view of the adjustment sliding block in neutron howitzer structure as shown in Figure 1.Fig. 4 is according to the disclosure one
The schematic perspective view of sliding block is adjusted shown in embodiment.
In conjunction with shown in Fig. 1, Fig. 3 and Fig. 4, in one embodiment, sliding block 4 is adjusted, be a hollow mount structure, be set to several
Outside piece neutron absorbing layer 2；Wherein, the upper and lower surfaces of the adjustment sliding block 4 are provided with and 2 corresponding number of neutron absorbing layer
Adjustment tank 5, spacing between each adjustment tank 5 are in graded profile along neutron absorbing layer direction disposed in parallel.Such as Fig. 1 institute
Show, the correspondence of adjustment column 3 of neutron absorbing layer 2 protrudes into the adjustment tank 5.
As shown in Figure 1, adjustment sliding block 4 is installed on 4 one slide rails 6 in the present embodiment, can be moved along sliding rail 6；It adjusts
Whole sliding block 4 is connect with one with forward and reverse thread lead screw 7, under the action of driving structure, adjusts sliding block 4 with forward and reverse screw thread silk
It moves on thick stick 7 to realize moving along sliding rail 6.As shown in figure 4, corresponding be provided with 6 perforation on adjustment sliding block 4, wherein
Perforation on 4 angles is for installing sliding rail 6；An intermediate perforation is for installing with forward and reverse thread lead screw 7.
Certainly, the number of sliding rail 6 can also be adjusted flexibly according to actual needs, be not limited to the present embodiment.
In some embodiments of the present disclosure, driving structure is servo motor, which is installed on fixed bracket 8
On.
In some embodiments of the present disclosure, the continuously adjustable neutron howitzer structure of the angle of divergence, further includes: positioning knot
Structure, for adjusting the positioning of sliding block 4.For example, location structure is encoder, preferably absolute encoder, absolute encoder installation
In on fixed bracket 8.In some embodiments, absolute encoder is installed on servo motor, is installed on together with servo motor
On fixed bracket 8, therefore, in order to simplify signal, servo motor (driving structure) and encoder (location structure) are illustrated together,
Servo motor and encoder are illustrated with label 9 in Fig. 1.
It should be noted that realize that the mobile structure of adjustment sliding block 4 is not limited to the above embodiment, it is any to can be realized tune
The moveable structure of whole sliding block 4 is within the protection scope of the disclosure.
In some embodiments of the present disclosure, the continuously adjustable neutron howitzer structure of the angle of divergence, further includes: motion control
System and data collection system, wherein kinetic control system realizes the mobile control to adjustment sliding block 4 by control driving structure
System；For data collection system for acquiring data, which includes neutron diverging angle information and the location information for adjusting sliding block 4.
Wherein, kinetic control system can control mobile control of the driving structure realization to adjustment sliding block 4 by computer remote
System.For example, kinetic control system can control servo motor precise rotation by computer remote to accurately control removable
Adjustment sliding block position, and then have the function that adjust neutron howitzer structure the neutron angle of divergence.
Certainly, in other embodiments, kinetic control system can be realized by other control modes to driving structure
Control, to realize the mobile control to adjustment sliding block.
In a preferred embodiment, the number for adjusting sliding block 4 is 2, and two adjustment sliding blocks 4 are oppositely arranged, and two adjustment
The distribution of adjustment tank 5 on sliding block 4 is symmetrical along the axis of orientation of 2 normal of neutron absorbing layer, has advanced optimized neutron-absorbing
The convenience and accuracy of interlamellar spacing adjustment, as shown in Figure 1 and Figure 5.
In one example, it as shown in Figure 1, two adjustment sliding blocks 4 are opposite according to the thin side of the distribution of adjustment tank 5, is distributed close
Side back to (right side be outer along the direction of y in Fig. 1, and left side is outer along the negative direction of y) while moving two outward and adjust
Whole sliding block 4, realizes turning down for spacing, moves two adjustment sliding blocks 4 simultaneously inward, realizes tuning up for spacing.
Fig. 5 is that the neutron howitzer structure that the angle of divergence according to shown in one embodiment of the disclosure is continuously adjusted realizes that neutron is inhaled
Receive the schematic illustration that interlamellar spacing continuously adjusts.
Achieve the purpose that emphasize emphasis to simplify attached drawing, it is independent to adjust adjustment tank 5 in sliding block in schematic diagram Fig. 5
Illustrated, some parts are exaggerated processing (such as adjustment column) and the only adjustment column 3 of 2 top of signal neutron absorbing layer
(adjustment column of lower section is corresponding with the adjustment adjustment tank of sliding block lower surface, does not make to illustrate), in the present embodiment, is corresponding with 2 adjustment
Sliding block is oppositely arranged, and the distribution of adjustment tank 5 on two adjustment sliding blocks 4 is symmetrical along the axis of orientation of 2 normal of neutron absorbing layer,
Illustrate the direction of the normal of neutron absorbing layer, to adjust the adjustment of the upper surface of sliding block in Fig. 5 with one of them with chain-dotted line in Fig. 5
The adjustment column of 2 top of slot 5 and neutron absorbing layer carries out principle explanation.In Fig. 5, double-head arrow illustrates two adjustment sliding blocks can be along
It is moved in the direction disposed in parallel of neutron absorbing layer 2.Simultaneously in order to illustrate principle, deliberately by adjustment tank far from adjustment in Fig. 5
Column both illustrates relativeness with dotted line, and in practical structures, adjustment column can be protruded into along perpendicular dotted line (up and down direction in attached drawing)
Inside adjustment tank.
As shown in figure 5, adjustment column 3 can be in a certain position of adjustment tank 5, example when adjustment sliding block is in a certain position
Such as: the adjustment column 3 of neutron absorbing layer disposed in parallel is located on line A-A for adjustment sliding block at this time, each adjustment
The position of column 3 is as shown in the position that two dotted lines intersect in Fig. 5, as the position of adjustment sliding block is moved along double-head arrow,
Due to the spacing between each adjustment tank 5 along neutron absorbing layer direction disposed in parallel be in graded profile, it is disposed in parallel in
The adjustment column 3 of sub- absorbed layer changes relatively relative to the position of the corresponding line A-A of adjustment sliding block at this time, corresponding each friendship
The distance between crunode also changes, i.e., makes neutron absorbing layer 2 the location of in adjustment tank 5 by changing adjustment column 3
Spacing change, to realize continuously adjusting for the neutron angle of divergence.In addition, two adjustment sliding blocks of setting are oppositely arranged, two
Close (or the distribution of adjustment tank distribution in the side of adjustment tank distribution close (or distribution dredge) and another adjustment sliding block in a adjustment sliding block
Dredge) side it is opposite, only need simultaneously the inward or outward mobile identical distance of two sliding blocks of adjustment simultaneously, advanced optimize
The convenience and accuracy of neutron-absorbing interlamellar spacing adjustment.
So far, the content introduction of one embodiment finishes.
In second exemplary embodiment of the disclosure, a kind of scaling method of angle of divergence is provided, for demarcating this
The open any neutron howitzer structure mentioned, the scaling method include: adjustment sliding block 4 to be moved to a certain position, and remember
The position of the lower adjustment sliding block 4 of record and the corresponding neutron angle of divergence；And to be in different location corresponding by obtaining adjustment sliding block 4
The neutron angle of divergence obtains the angle of divergence of the neutron howitzer structure and the corresponding relationship curve of adjustment 4 position of sliding block, realizes mark
It is fixed.
In some embodiments of the present disclosure, the position of adjustment sliding block 4 is determined by location structure (such as absolute encoder)
It sets；The position for adjusting sliding block 4 and the corresponding neutron angle of divergence are recorded by data collection system；It is controlled by kinetic control system
Adjustment sliding block 4 is moved to different location.
In one example, before the use, continuous to the angle of divergence shown in the disclosure using neutron howitzer test device
Adjustable neutron howitzer structure has carried out angle of divergence calibration and the transmissivity of the different angles of divergence is tested.
Wherein, the neutron howitzer knot angle of divergence shown in the disclosure being continuously adjusted using neutron howitzer test device
Structure has carried out following (the test method reference literature of key step of the transmissivity test of angle of divergence calibration and the different angles of divergence
N.I.M.108 (1973) -107-111):
(1) neutron howitzer Neutron properties test device is placed near the neutron scattering spectrometer in certain work, and with it
Extra unused transmission neutron Shu Zuowei tests neutron source；The neutron howitzer structure being continuously adjusted according to the angle of divergence to be tested
Size the limit beam size of two-dimentional adjustable slit is adjusted；
(2) neutron howitzer of a known neutron angle of divergence is placed in quasi- with the neutron close to test device incident beam
In straight device fixing seat, turntable, height adjustment device, horizontal slide rail and longitudinal slide rail are adjusted by control system, made in this
Sub- collimator is aligned with two-dimentional adjustable slit；
(3) the neutron howitzer structure (neutron howitzer structure referred to as to be tested) being continuously adjusted the angle of divergence to be tested
Be placed in another neutron howitzer fixing seat, by control system adjust turntable, height adjustment device, horizontal slide rail and
Longitudinal slide rail keeps the neutron howitzer of neutron howitzer structure to be tested and the aforementioned known neutron angle of divergence and two dimension adjustable
Slit is directed at (optical path is in the same horizontal plane)；
(4) with the above-mentioned position adjusted for 0 °, adjusting turntable by control system makes neutron howitzer knot to be tested
Structure turns to 2 ° by -2 °, and rotation step pitch is 0.02 °, obtains a neutron counting by neutron detection system, obtains in be tested
The rocking curve of sub- collimator structure calculates the neutron angle of divergence of neutron howitzer structure to be tested according to the rocking curve；
(5) spacing for changing neutron absorbing layer in neutron howitzer structure to be tested, by the position for changing adjustment sliding block
It realizes the spacing for changing neutron absorbing layer, and repeats neutron hair when testing procedure above measures different neutron-absorbing interlamellar spacings
Dissipate angle.It records different neutron-absorbing interlamellar spacings and adjusts slide position and the corresponding angle of divergence accordingly, so after measurement repeatedly
It can obtain the relation curve of the neutron angle of divergence coding corresponding with position of neutron howitzer structure to be tested.
(6) neutron howitzer structure to be tested is obtained by removing in neutron howitzer fixing seat by neutron detection system
Take neutron counting at this time；It is calculated according to the multiple and different position maximum neutron countings obtained in the neutron counting and step (5)
The neutron transmission rate of neutron howitzer structure out completes its neutron Calibration；
(7) collimator can be placed in the shield of neutron scattering spectrometer and is carried out using using after the completion of demarcating
It can be adjusted in the process according to use demand, the curve of the neutron angle of divergence and coding that are measured according to front, by the angle of divergence
The angle of divergence of continuously adjustable neutron howitzer structure is adjusted to required size.
In conclusion present disclose provides a kind of continuously adjustable neutron howitzer structure of angle of divergence and its scaling method,
A kind of neutron howitzer knot for realizing that the angle of divergence is continuously adjusted based on change neutron-absorbing interlamellar spacing is in industry provided for the first time
The adjustment tank of spacing graded profile is arranged by the way that moveable adjustment sliding block is arranged in structure on adjustment sliding block, the adjustment tank and flat
If the dry plate neutron absorbing layer of row setting is corresponding, the adjustment column (fixed) on every neutron absorbing layer is mobile in adjustment sliding block
During (adjustment sliding block mobile), adjustment column corresponds to the different location of adjustment tank, thus change neutron incident direction it is corresponding in
Son absorbs interlamellar spacing, realizes continuously adjusting for the neutron angle of divergence, can realize in a neutron howitzer structure according to reality
Demand carries out the adjustment of the angle of divergence, meets various neutron experiments requirements, can greatly reduce collimator in practical applications
Replacement frequency to save the valuable neutron streaming time, while the quantity of collimator needed for reducing is a large amount of to save
Purchase funds；By the way that two adjustment sliding blocks are arranged, and it is oppositely arranged two adjustment sliding blocks, i.e., the adjustment on two adjustment sliding blocks
Slot distribution is symmetrical along the axis of orientation of neutron absorbing layer normal, has advanced optimized the convenience of neutron-absorbing interlamellar spacing adjustment
Property and accuracy；Kinetic control system can by computer remote control driving structure (such as servo motor) precise rotation to
The position of moveable adjustment sliding block is accurately controlled, and then reaches the work for adjusting the neutron angle of divergence of neutron howitzer structure
With.
It should be noted that the direction term mentioned in embodiment, such as "upper", "lower", "front", "rear", "left", "right"
Deng being only the direction with reference to attached drawing, not be used to limit the protection scope of the disclosure.Through attached drawing, identical element is by identical
Or similar appended drawing reference indicates.When may cause understanding of this disclosure and cause to obscure, conventional structure or structure will be omitted
It makes.
And the shape and size of each component do not reflect actual size and ratio in figure, and only illustrate the embodiment of the present disclosure
Content.In addition, in the claims, any reference symbol between parentheses should not be configured to the limit to claim
System.Word "comprising" or " comprising " do not exclude the presence of element or step not listed in the claims.List located in front of the element
Word "a" or "an" does not exclude the presence of multiple such elements.
The word of ordinal number such as " first ", " second ", " third " etc. used in specification and claim, with modification
Corresponding element, itself is not meant to that the element has any ordinal number, does not also represent the suitable of a certain element and another element
Sequence in sequence or manufacturing method, the use of those ordinal numbers are only used to enable an element and another tool with certain name
Clear differentiation can be made by having the element of identical name.
Similarly, it should be understood that in order to simplify the disclosure and help to understand one or more of each open aspect,
Above in the description of the exemplary embodiment of the disclosure, each feature of the disclosure is grouped together into single implementation sometimes
In example, figure or descriptions thereof.However, the disclosed method should not be interpreted as reflecting the following intention: i.e. required to protect
The disclosure of shield requires features more more than feature expressly recited in each claim.More precisely, as following
Claims reflect as, open aspect is all features less than single embodiment disclosed above.Therefore,
Thus the claims for following specific embodiment are expressly incorporated in the specific embodiment, wherein each claim itself
All as the separate embodiments of the disclosure.
Particular embodiments described above has carried out further in detail the purpose of the disclosure, technical scheme and beneficial effects
Describe in detail it is bright, it is all it should be understood that be not limited to the disclosure the foregoing is merely the specific embodiment of the disclosure
Within the spirit and principle of the disclosure, any modification, equivalent substitution, improvement and etc. done should be included in the guarantor of the disclosure
Within the scope of shield.
Claims (10)
1. a kind of continuously adjustable neutron howitzer structure of angle of divergence characterized by comprising
If dry plate neutron absorbing layer (2) is arranged in parallel, the upper and lower of every neutron absorbing layer (2) is respectively and fixedly provided with adjustment column (3)；
It adjusts sliding block (4), is a hollow mount structure, if it is external to be set to the dry plate neutron absorbing layer (2)；Wherein, the adjustment
The upper and lower surfaces of sliding block (4) are provided with the adjustment tank (5) with the neutron absorbing layer (2) corresponding number, each adjustment tank
(5) spacing between is along neutron absorbing layer direction disposed in parallel in graded profile, the adjustment column of the neutron absorbing layer (2)
(3) it protrudes into the adjustment tank (5)；And
Driving structure, for driving the adjustment sliding block (4) to be moved along neutron absorbing layer (2) direction disposed in parallel, with
Change adjustment column (3) makes the spacing of neutron absorbing layer (2) change the location of in adjustment tank (5), thus in realizing
The sub- angle of divergence continuously adjusts.
2. neutron howitzer structure according to claim 1, which is characterized in that
The adjustment sliding block (4) is installed on sliding rail (6), can be moved along the sliding rail (6)；
The adjustment sliding block (4) connect with one with forward and reverse thread lead screw (7), and under the action of driving structure, the adjustment is slided
Block (4) moves in the forward and reverse thread lead screw of the band (7) to realize the movement along sliding rail (6).
3. neutron howitzer structure according to claim 2, which is characterized in that
The sliding rail (6) is fixed on fixed bracket (8)；
The forward and reverse thread lead screw of band (7) is fixed on fixed bracket (8)；
The every neutron absorbing layer (2) is installed on neutron absorbing layer frame (1), each neutron absorbing layer frame (1) it is upper,
Lower section is fixedly installed adjustment column (3), and the neutron absorbing layer frame (1) is connected with the fixed bracket (8).
4. neutron howitzer structure according to claim 1, which is characterized in that further include:
Location structure, the positioning for adjustment sliding block (4).
5. neutron howitzer structure according to claim 4, which is characterized in that the location structure is absolute encoder,
The absolute encoder is installed on fixed bracket (8).
6. neutron howitzer structure according to claim 1, which is characterized in that further include:
Kinetic control system is realized by controlling the driving structure to the mobile control for adjusting sliding block (4)；And
Data collection system, for acquiring data, which includes the position of neutron diverging angle information and adjustment sliding block (4)
Information.
7. neutron howitzer structure according to claim 1, which is characterized in that the driving structure is servo motor, should
Servo motor is installed on fixed bracket (8).
8. neutron howitzer structure according to any one of claim 1 to 7, which is characterized in that the adjustment sliding block (4)
Number be 2, two adjustment sliding blocks (4) are oppositely arranged, and two adjustment sliding block (4) on adjustment tanks (5) distributions along neutron
The axis of orientation of absorbed layer (2) normal is symmetrical.
9. a kind of scaling method of the angle of divergence, for demarcating neutron howitzer structure described in any item of the claim 1 to 8,
It is characterised by comprising:
The adjustment sliding block (4) is moved to a certain position, and records the position for adjusting sliding block (4) and corresponding neutron
The angle of divergence；And
It is in the corresponding neutron angle of divergence of different location by obtaining the adjustment sliding block (4), obtains the neutron howitzer structure
The angle of divergence and adjustment sliding block (4) position corresponding relationship curve, realize calibration.
10. scaling method according to claim 9, which is characterized in that
The position of adjustment sliding block (4) is determined by the location structure；
The position for adjusting sliding block (4) and the corresponding neutron angle of divergence are recorded by the data collection system；
The adjustment sliding block (4), which is controlled, by the kinetic control system is moved to different location.
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