CN102288626A - Neutron texture testing equipment - Google Patents
Neutron texture testing equipment Download PDFInfo
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- CN102288626A CN102288626A CN201110200084XA CN201110200084A CN102288626A CN 102288626 A CN102288626 A CN 102288626A CN 201110200084X A CN201110200084X A CN 201110200084XA CN 201110200084 A CN201110200084 A CN 201110200084A CN 102288626 A CN102288626 A CN 102288626A
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- collimating apparatus
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- 238000012360 testing method Methods 0.000 title claims abstract description 32
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- 238000005259 measurement Methods 0.000 abstract description 10
- 230000005855 radiation Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
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- 238000001683 neutron diffraction Methods 0.000 description 6
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- 238000010586 diagram Methods 0.000 description 4
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- 238000012423 maintenance Methods 0.000 description 2
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- 238000011160 research Methods 0.000 description 2
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- 238000002441 X-ray diffraction Methods 0.000 description 1
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- 229910052796 boron Inorganic materials 0.000 description 1
- -1 boron carbides Chemical class 0.000 description 1
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- 239000003610 charcoal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention discloses neutron texture testing equipment, relates to the technical field of neutron radiation, and solves the problem that the divergence in the vertical direction cannot be effectively limited by arranging a collimator for limiting the divergence in the horizontal direction in the prior art. The scheme provided by the embodiment of the invention is as follows: the device comprises a first collimator, a monochromator, a sample table, a detector and a third collimator, wherein the third collimator comprises a horizontal collimator and a vertical collimator which are perpendicular to each other and limit the divergence direction of a neutron beam. The embodiment of the invention is suitable for neutron measurement instruments and the like.
Description
Technical field
The present invention relates to the neutron irradiation technical field, relate in particular to a kind of neutron texture testing apparatus.
Background technology
Texture is the preferred orientation that polycrystalline material forms in generating, prepare, synthesize technological processs such as reaching processing.The mensuration of texture mainly relies on technology such as X-ray diffraction, neutron diffraction, Electron Back-Scattered Diffraction, synchrotron radiation diffraction and transmission electron microscope at present.The neutron diffraction technology is compared with other diffractive technology, measure and research texture aspect have a series of superiority: the penetration power of (1) neutron is very strong, absorbs for a short time, can measure the texture of bulk sample, obtains the information of more valued body texture on the engineering; Therefore guarantee the high statistical and the high measurement accuracy of data simultaneously, can accurately survey for texture with phase that volume ratio is very little in thick material of inhomogeneous texture, absorption factor anisotropy, crystal grain and the heterogeneous material; (2) neutron has magnetic moment, thereby neutron diffraction becomes the only resource of present measurement material magnetic texture; (3) neutron diffraction technology is easy to carry out the original position texture measurement of simulation sample operating mode (such as high temperature, high pressure), can study texture generative process and condition.Therefore the neutron diffraction method has become the standard method of polycrystalline material body texture measurement in the world.
The neutron texture testing apparatus principle of work of utilizing the neutron diffraction method as shown in Figure 1, wherein 1 is reactor, 2 is first collimating apparatus, 3 is monochromator, 4 is testing sample, 5 for having the sample stage of Euler's Angle measurement, 6 is detector." white " of drawing from reactor 1 horizontal hole is neutron beam continuously, through first collimating apparatus, the 2 restriction directional divergence and the monochromators 3 that lead, the neutron near the narrow and small wavelength band Δ λ scope of the intrafascicular wavelength X of incident neutron is selected by the particular crystal plane family of monochromator 3, its reflection is directed to the testing sample 4 that is placed on the sample stage, encircle mechanical Angle measurement by the large-scale Euler who is fixed on the sample stage, realize sample in the space 4 π arbitrary orientations and accurately read the angle, collect the neutron of scattering again by the detector that is placed in certain (hk1) face family angle of diffraction, finish experiment measuring.Rotate by Euler's Angle measurement, reach the intensity of measuring samples different orientation, obtain texture utmost point figure.
At present, big in the world neutron scattering experiment chamber nearly all is furnished with neutron texture testing apparatus.But still face some problems: present international texture diffractometer substantially all is furnished with the 3rd collimating apparatus, be used for limiting the neutron beam divergence that incides detector, but only be equipped with the collimating apparatus of a limit levels directional divergence, thereby the divergence of vertical direction can not get effective restriction.
Summary of the invention
At existing deficiency in the prior art, the object of the present invention is to provide a kind of neutron texture testing apparatus, for the divergence of the 3rd collimating apparatus vertical direction provides restriction.
The present invention solves the problems of the technologies described above the technical scheme that adopted as described below:
A kind of neutron texture testing apparatus comprises first collimating apparatus, monochromator, sample stage, detector and the 3rd collimating apparatus, and described the 3rd collimating apparatus comprises the horizontal collimating apparatus and the vertical collimating apparatus of two orthogonal restriction neutron beam divergence directions.
Further, described horizontal collimating apparatus and vertically the divergence of collimating apparatus be 30 '.
Further, neutron texture testing apparatus also comprises shield, and described shield is 5.2g/cm for pouring density
3Loaded concrete.And described shield comprises a plurality of members of brick pattern block structured, and described a plurality of members are non-regular shape.
Further, described monochromator is positioned at second attitude to be adjusted on the platform, and described second attitude is adjusted the translation adjustment that platform is used to control described monochromator rotation, inclination angle and X, Y, three directions of Z.
Further, described monochromator is fixed on described second attitude by the aluminium alloy adaptor and adjusts on the platform, described second attitude is adjusted platform and is comprised 2 translation stages, 1 lifting table, 1 angle position platform and 1 turntable composition, described turntable is positioned at below, upwards is followed successively by described translation stage, described lifting table, position, described angle platform, described aluminium alloy adaptor and described monochromator.
Further, described first collimating apparatus is positioned at first attitude to be adjusted on the platform, and described first attitude is adjusted the translation adjustment that platform is used to control the described first collimating apparatus device rotation, inclination angle and X, Y, three directions of Z.
Further, described sample stage comprises and is used to control the Euler loop device of sample along three axles rotations.
Further, described detector is
3The He detector.Described
3The He detector is
3He proportional counter tube detector.
Effect of the present invention is: the present invention is after having taked technique scheme, and the neutron beam divergence of vertical direction is limited, thereby the resolution of neutron texture testing apparatus vertical direction has also obtained large increase.
Description of drawings
Fig. 1 is a neutron texture testing apparatus principle of work synoptic diagram;
Fig. 2 is the principle of work synoptic diagram of embodiment of the invention neutron texture testing apparatus;
Fig. 3 is the structural representation of the Soller type collimating apparatus of embodiment of the invention neutron texture testing apparatus;
Fig. 4 puts synoptic diagram for the 3rd collimating apparatus of embodiment of the invention neutron texture testing apparatus;
Fig. 5 is the structural representation of Euler's loop device of embodiment of the invention neutron texture testing apparatus;
Fig. 6 is the part-structure synoptic diagram of the shield of embodiment of the invention neutron texture testing apparatus.
Embodiment
Present invention is described below in conjunction with the drawings and specific embodiments.
The embodiment of the invention is the neutron texture testing apparatus according to the advanced research reactor of China (CARR) design.Certainly, the technical scheme of the embodiment of the invention is equally applicable to other reactors.
As shown in Figure 2, a kind of neutron texture testing apparatus, comprise that first collimating apparatus 2, monochromator 3, monochromator shield 7, sample stage 4, detector 6, detector shield 9 and the 3rd collimating apparatus 8, the three collimating apparatuss 8 comprise the horizontal collimating apparatus 81 and the vertical collimating apparatus 82 of two orthogonal restriction neutron beam divergence directions.Wherein, sample stage 4 is for to have the sample rotary table that Euler encircles mechanical Angle measurement, and detector 6 is
3He proportional counter tube neutron detector, monochromator shield 7 and detector shield 9 play biology and physical shielding effect.
Each parameters of operating part and the layout of the neutron texture testing apparatus of CARR design are as shown in the table:
As shown in Figure 3, first collimating apparatus 2 and the 3rd collimating apparatus 8 all adopt Soller type collimating apparatus, and this collimating apparatus is by being coated with Gd
2O
3Wheat membrane and aluminum alloy casing form, the wheat membrane by screw retention on aluminum alloy casing.The first collimating apparatus effective dimensions is: 40mm (wide) * 100mm (height) * 300mm (length), the angle of divergence is respectively: 10 ', 30 ' and open.First collimating apparatus all is placed in stainless attitude and adjusts on the platform 21, and first attitude is adjusted the translation adjustment that platform 21 is used to control the described first collimating apparatus device rotation, inclination angle and X, Y, three directions of Z.Realize the selection and the collimator position adjusting (level, vertical, degree of tilt) of different divergence collimating apparatuss by the motion of attitude adjustment platform 21; The 3rd collimating apparatus effective dimensions is: 15mm (wide) * 15mm (height) * 150mm (length), and the angle of divergence is 30 '.The 3rd collimating apparatus 8 all is placed in the detector shield.
As shown in Figure 2, the embodiment of the invention is laid two effective dimensions in detector 6 fronts be 2cm (wide) * 2cm (height) * 15cm (length), divergence is 30 ' horizontal collimating apparatus 81 of Soller type and vertical collimating apparatus 82, mode is as shown in Figure 4 put, horizontal collimating apparatus 81 is used for the neutron beam divergence of limit levels direction, vertically collimating apparatus 82 is used for limiting the neutron beam divergence of vertical direction, and after improving, the resolution of spectrometer vertical direction has also obtained large increase.
Sample stage 4 comprises and is used to control the Euler loop device of sample along three axles rotations.Sample then is fixed on Euler and encircles the center.As shown in Figure 5, the rotation axis of Euler's ring comprises the ω axle, φ axle, x axle and 2 θ axles.Wherein, 2 θ axles are used for rotation
3The He detector is gathered the neutron counting of specific 2 θ angles to specified angle; The ω axle generally turns to the θ angle in measuring process, x axle and φ axle are used to make certain crystal face to forward the specific orientation position to.
Shield need be taken all factors into consideration the requirements such as effect that CARR heap flux, other adjacent spectrometer layouts of reactor hall and space, shielding will reach.The shell of shield is selected the thick charcoal steel of 10mm for use, and inner pouring density is 5.2g/cm
3Loaded concrete, concrete is made up of materials such as the column iron ore of a certain proportion of water, cement, iron ore, different radii, boron carbides.
Shielding body weight and bulky need be divided into member, is combined into integral body behind the concrete perfusion.The structural design of member considered reliability, the reactor hall crane of splicing place shielding bearing capacity, lift and lay, the series of factors such as convenience of arrangement, maintenance and the inspection of monochromatic beam exit channel, the specific design scheme is: as shown in Figure 6, shield is the brick pattern block structure, be not designed to abnormity as far as possible, can not occur vertical masonry joint between layer and the layer and leak to reduce; The design of shield need be considered to combine with the close of reactor body.Wherein two shielding columns contacting with the method hurdle of horizontal hole both sides need carry out in-site pouring, and body is close combines so that it is with heap, reduces and reveals; For easy to maintenance, the shield that installs can be opened easily, and the position that may need to open is in the situation that does not need to open other local shielding slab and opens easily, leave wire casing in the position that shield is suitable, draw easily so that will control monochromator, first collimating apparatus and other electric wire; Every shield must be embedded with the screw hole of lifting usefulness at certain symmetric position place, guaranteeing on-the-spot the installation smoothly, and firmly with wall welding angle iron gusset, horizontal needing so that casing connects firmly with concrete, and the assurance easy installation and removal; Whole shield will be carried on the base steel plates that is layed in ground, and the ground load-bearing is dispersed.Therefore the shield outside reaches unrestricted district standard, i.e. metering equivalent≤0.25mrem/hr.
In sum, the neutron texture testing apparatus that provides of the embodiment of the invention is widely used in neutron measurement instrument etc.
It should be noted that; above-mentioned specific embodiment only is exemplary; under above-mentioned instruction of the present invention, those skilled in the art can carry out various improvement and distortion on the basis of the foregoing description, and these improvement or distortion drop in protection scope of the present invention.It will be understood by those skilled in the art that top specific descriptions just in order to explain purpose of the present invention, are not to be used to limit the present invention.Protection scope of the present invention is limited by claim and equivalent thereof.
Claims (10)
1. neutron texture testing apparatus, comprise first collimating apparatus, monochromator, sample stage, detector and the 3rd collimating apparatus, it is characterized in that described the 3rd collimating apparatus comprises the horizontal collimating apparatus and the vertical collimating apparatus of two orthogonal restriction neutron beam divergence directions.
2. neutron texture testing apparatus according to claim 1 is characterized in that, described horizontal collimating apparatus and vertically the divergence of collimating apparatus be 30 '.
3. neutron texture testing apparatus according to claim 1 is characterized in that, also comprises shield, and described shield is 5.2g/cm for pouring density
3Loaded concrete.
4. neutron texture testing apparatus according to claim 3 is characterized in that described shield comprises a plurality of members of brick pattern block structured, and described a plurality of members are non-regular shape.
5. neutron texture testing apparatus according to claim 1 is characterized in that, described monochromator is positioned at second attitude to be adjusted on the platform, and described second attitude is adjusted the translation adjustment that platform is used to control described monochromator rotation, inclination angle and X, Y, three directions of Z.
6. neutron texture testing apparatus according to claim 5, it is characterized in that, described monochromator is fixed on described second attitude by the aluminium alloy adaptor and adjusts on the platform, described second attitude is adjusted platform and is comprised 2 translation stages, 1 lifting table, 1 angle position platform and 1 turntable composition, described turntable is positioned at below, upwards is followed successively by described translation stage, described lifting table, position, described angle platform, described aluminium alloy adaptor and described monochromator.
7. neutron texture testing apparatus according to claim 1, it is characterized in that, described first collimating apparatus is positioned at first attitude to be adjusted on the platform, and described first attitude is adjusted the translation adjustment that platform is used to control the described first collimating apparatus rotation, inclination angle and X, Y, three directions of Z.
8. neutron texture testing apparatus according to claim 1 is characterized in that, described sample stage comprises and is used to control the Euler loop device of sample along three axles rotations.
9. neutron texture testing apparatus according to claim 1 is characterized in that described detector is
3The He detector.
10. neutron texture testing apparatus according to claim 9 is characterized in that, and is described
3The He detector is
3He proportional counter tube detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110200084XA CN102288626A (en) | 2011-07-18 | 2011-07-18 | Neutron texture testing equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110200084XA CN102288626A (en) | 2011-07-18 | 2011-07-18 | Neutron texture testing equipment |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104216000A (en) * | 2014-09-02 | 2014-12-17 | 中国原子能科学研究院 | Method for testing divergence angle of neutron Soller collimator |
| CN104776946A (en) * | 2015-05-06 | 2015-07-15 | 中国原子能科学研究院 | Shielding device for radioactive sample neutron residual stress measurement |
| CN108469446A (en) * | 2018-06-29 | 2018-08-31 | 天津敬慎坊科技有限公司 | A kind of fluorescent X-ray absorption spectrum detector |
| CN109212585A (en) * | 2018-07-26 | 2019-01-15 | 东莞材料基因高等理工研究院 | It is a kind of for detect neutron monochromator mosaic angle distribution test method and device |
| CN112945994A (en) * | 2021-02-02 | 2021-06-11 | 中国原子能科学研究院 | Sample loading and heating device for neutron texture diffraction spectrometer |
| WO2023056882A1 (en) * | 2021-10-08 | 2023-04-13 | 同方威视技术股份有限公司 | Inspection device for scanning and inspecting object being inspected |
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Patent Citations (2)
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| CN101668483A (en) * | 2007-03-19 | 2010-03-10 | 普兰梅卡有限公司 | Limit the X-ray beam relevant with dental imaging |
| CN101386933A (en) * | 2008-11-06 | 2009-03-18 | 中国原子能科学研究院 | Neutron diffraction sample chamber |
Non-Patent Citations (3)
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104216000A (en) * | 2014-09-02 | 2014-12-17 | 中国原子能科学研究院 | Method for testing divergence angle of neutron Soller collimator |
| CN104216000B (en) * | 2014-09-02 | 2017-03-29 | 中国原子能科学研究院 | It is a kind of to be used for neutron Soller collimators divergent angle test method |
| CN104776946A (en) * | 2015-05-06 | 2015-07-15 | 中国原子能科学研究院 | Shielding device for radioactive sample neutron residual stress measurement |
| CN104776946B (en) * | 2015-05-06 | 2018-04-17 | 中国原子能科学研究院 | Screening arrangement for radioactive sample neutron residual stress measurement |
| CN108469446A (en) * | 2018-06-29 | 2018-08-31 | 天津敬慎坊科技有限公司 | A kind of fluorescent X-ray absorption spectrum detector |
| CN109212585A (en) * | 2018-07-26 | 2019-01-15 | 东莞材料基因高等理工研究院 | It is a kind of for detect neutron monochromator mosaic angle distribution test method and device |
| CN109212585B (en) * | 2018-07-26 | 2023-09-01 | 东莞材料基因高等理工研究院 | Testing method and device for detecting embedded angle distribution of neutron monochromator |
| CN112945994A (en) * | 2021-02-02 | 2021-06-11 | 中国原子能科学研究院 | Sample loading and heating device for neutron texture diffraction spectrometer |
| CN112945994B (en) * | 2021-02-02 | 2022-03-11 | 中国原子能科学研究院 | Sample loading and heating device for neutron texture diffraction spectrometer |
| WO2023056882A1 (en) * | 2021-10-08 | 2023-04-13 | 同方威视技术股份有限公司 | Inspection device for scanning and inspecting object being inspected |
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