CN105068105A - Leakage radiation testing method for accelerator head - Google Patents
Leakage radiation testing method for accelerator head Download PDFInfo
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- CN105068105A CN105068105A CN201510506153.8A CN201510506153A CN105068105A CN 105068105 A CN105068105 A CN 105068105A CN 201510506153 A CN201510506153 A CN 201510506153A CN 105068105 A CN105068105 A CN 105068105A
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- accelerator head
- thermoluminescence
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- leakage rediation
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Abstract
The invention provides a leakage radiation testing method for an accelerator head. 24 testing points are determined on the accelerator head, and one thermoluminescent dosimeter is placed on each testing point. Each thermoluminescent dosimeter carries out leakage radiation testing on each testing point at the same time. The thermoluminescent dosimeters are taken of and the data are read after the testing is finished. The thermoluminescent dosimeters are low in cost and can be conveniently placed on testing points. Testing all testing points can be finished in one time, and the testing efficiency is substantially improved. The accuracy of the positions of the testing points is ensured, and the risk of damaging apparatuses is lowered.
Description
Technical field
The present invention relates to a kind of accelerator head leakage rediation method of testing.
Background technology
Accelerator head compromising emanation is the necessary test item of accelerator test item, needs the radiation detection completing 24 points under accelerator open state on the sphere of distance focal point 1m.Existing method is exactly the point utilizing conventional radiation detection instrument to be placed on setting, point point completes detection, need during detection repeatedly to pass in and out machine room, and on predetermined check point, lay detecting instrument very inconvenient, need to configure a lot of support and just can complete.If the accelerator that leakage rate is larger, exceed the range ability of conventional radiation detecting instrument possibly, if do not know in advance, not only can not Measurement accuracy, also can damage detecting instrument.
Summary of the invention
The invention provides a kind of program simply, simultaneously to sample, measure accelerator head leakage rediation method of testing accurately.
The technical solution used in the present invention is:
Accelerator head leakage rediation method of testing, it is characterized in that: in accelerator head, determine 24 check points, each check point place is all placed with thermoluminescent dosemeter, each thermoluminescent dosemeter carries out leakage rediation detection to check point simultaneously, detect terminate after take off thermoluminescent dosemeter carry out data survey read.The thermoluminescent dosemeter cost that the present invention uses is low, can be placed on check point easily, disposablely can detect required point, substantially increases detection efficiency, and can ensure the accuracy of check point position, can also the risk damaged of lowering apparatus.
Further, described thermoluminescent dosemeter comprises thermoluminescence element and measuring box, and described thermoluminescence element is that thermoluminescence material is wrapped to form ball-shaped structure by glass, and described measuring box is the organic glass ball be wrapped in outside thermoluminescence element.Outside the function of measuring box apart from packaging thermoluminescence element, also play electronic equilibrium effect, namely as buildup material, therefore the material of measuring box must select the equivalent material of water, the water equivalent material of most economical material benefit is exactly polymethylmethacrylate (PMMA), i.e. organic glass.Because thermoluminescence element has directivity when receiving ray, therefore thermoluminescence material (white powder) is become ball-shaped with glass-coated, so just have isotropic nature, the wall thickness of glass bead is 0.5mm, and internal diameter is 3mm, and active volume is 14mm
3.Due to needs isotropy, therefore, measuring box is also made into organic glass ball.
Further, described thermoluminescence element adopts the thermoluminescence material of muting sensitivity, such as LiF:Mg, Ti material (white powder).Because accelerator head compromising emanation amount is comparatively large, and energy is high, and therefore thermoluminescence element adopts the thermoluminescence material of muting sensitivity.
Further, the glass of described thermoluminescence element adopts the glass that thermal behavior is excellent, is because thermoluminescence element needs to be heated rapidly to about 300 DEG C when detecting.
Further, the thickness of described measuring box is determined according to the energy of ray, for the ray of different-energy, the buildup material variable thickness sample that test maximum dose point needs, therefore detect hour hands and corresponding measuring box is selected to ray energy, such as, when detecting the X ray of 10MV, be just the organic glass ball of 15mm with radius, because the maximum dose point of 10MVX ray is 15mm place under water.
Further, two hemisphere of described measuring box are connected by coupling bar, when according to ray energy determination measuring box, facilitate measuring box to assemble and thermoluminescence element is wrapped in the inside.
Further, described thermoluminescent dosemeter is suspended on check point by plastic bar.
Beneficial effect of the present invention: material and the instrument cost of use are low, can be placed on measurement point easily, disposablely can detect required point, substantially increase detection efficiency, and the accuracy of check point position can be ensured, can also lowering apparatus damage risk.
Accompanying drawing explanation
Fig. 1 is the structural representation of thermoluminescent dosemeter of the present invention.
Fig. 2 is the episphere structural representation of thermoluminescent dosemeter of the present invention.
Embodiment
Below in conjunction with specific embodiment, the present invention is further described, but does not limit the invention to these embodiments.One skilled in the art would recognize that all alternativess, improvement project and the equivalents that present invention encompasses and may comprise in Claims scope.
With reference to Fig. 1, Fig. 2, accelerator head leakage rediation method of testing, accelerator head is determined 24 check points, each check point place is all placed with thermoluminescent dosemeter, each thermoluminescent dosemeter carries out leakage rediation detection to check point simultaneously, detect terminate after take off thermoluminescent dosemeter carry out data survey read.The thermoluminescent dosemeter cost that the present invention uses is low, can be placed on check point easily, disposablely can detect required point, substantially increases detection efficiency, and can ensure the accuracy of check point position, can also the risk damaged of lowering apparatus.
Thermoluminescent dosemeter described in the present embodiment comprises thermoluminescence element 1 and measuring box 2, and thermoluminescence material is wrapped to form ball-shaped structure for glass by described thermoluminescence element 1, and described measuring box 2 is for being wrapped in the organic glass ball outside thermoluminescence element 1.Outside the function of measuring box 2 apart from packaging thermoluminescence element 1, also play electronic equilibrium effect, namely as buildup material, therefore the material of measuring box 2 must select the equivalent material of water, the water equivalent material of most economical material benefit is exactly polymethylmethacrylate (PMMA), i.e. organic glass.Because thermoluminescence element 1 has directivity when receiving ray, therefore thermoluminescence material (white powder) is become ball-shaped with glass-coated, so just have isotropic nature, the wall thickness of glass bead is 0.5mm, and internal diameter is 3mm, and active volume is 14mm
3.Due to needs isotropy, therefore, measuring box 2 is also made into organic glass ball.Thermoluminescent dosemeter volume is little, and quality is light, can be placed on the position wanted very easily.
Thermoluminescence element 1 described in the present embodiment adopts the thermoluminescence material of muting sensitivity, such as LiF:Mg, Ti material (white powder).Because accelerator head compromising emanation amount is comparatively large, and energy is high, and therefore thermoluminescence element adopts the thermoluminescence material of muting sensitivity.
The glass of thermoluminescence element 1 described in the present embodiment adopts the glass that thermal behavior is excellent, is because thermoluminescence element needs to be heated rapidly to about 300 DEG C when detecting.
Described in the present embodiment, the thickness of measuring box 2 is determined according to the energy of ray, for the ray of different-energy, the buildup material variable thickness sample that test maximum dose point needs, therefore detect hour hands and corresponding measuring box 2 is selected to ray energy, such as, when detecting the X ray of 10MV, be just the organic glass ball of 15mm with radius, because the maximum dose point of 10MVX ray is 15mm place under water.
Two hemisphere of measuring box 2 described in the present embodiment are connected by coupling bar 3, when according to ray energy determination measuring box, facilitate measuring box 2 to assemble and thermoluminescence element 1 is wrapped in the inside.
Described in the present embodiment, thermoluminescent dosemeter is suspended on check point by plastic bar.
Claims (7)
1. accelerator head leakage rediation method of testing, it is characterized in that: in accelerator head, determine 24 check points, each check point place is all placed with thermoluminescent dosemeter, each thermoluminescent dosemeter carries out leakage rediation detection to check point simultaneously, detect terminate after take off thermoluminescent dosemeter carry out data survey read.
2. accelerator head leakage rediation method of testing as claimed in claim 1, it is characterized in that: described thermoluminescent dosemeter comprises thermoluminescence element and measuring box, described thermoluminescence element is that thermoluminescence material is wrapped to form ball-shaped structure by glass, and described measuring box is the organic glass ball be wrapped in outside thermoluminescence element.
3. accelerator head leakage rediation method of testing as claimed in claim 2, is characterized in that: described thermoluminescence element adopts the thermoluminescence material of muting sensitivity.
4. accelerator head leakage rediation method of testing as claimed in claim 2, is characterized in that: the glass of described thermoluminescence element adopts the glass that thermal behavior is excellent.
5. accelerator head leakage rediation method of testing as claimed in claim 2, is characterized in that: the thickness of described measuring box is determined according to the energy of ray.
6. accelerator head leakage rediation method of testing as claimed in claim 5, is characterized in that: two hemisphere of described measuring box are connected by coupling bar.
7. the accelerator head leakage rediation method of testing as described in one of claim 1 ~ 6, is characterized in that: described thermoluminescent dosemeter is suspended on check point by plastic bar.
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| CN201510506153.8A CN105068105B (en) | 2015-08-18 | 2015-08-18 | Accelerator head leakage rediation method of testing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106680865A (en) * | 2017-03-08 | 2017-05-17 | 沈阳东软医疗***有限公司 | Equipment and method for ray leakage testing of radiation source component |
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Inventor after: Chen Rongmin Inventor after: Li Xuehua Inventor after: Xu Mingming Inventor after: Luo Cheng Inventor after: Huang Jiuzhu Inventor after: Guo Qian Inventor before: Chen Rongmin Inventor before: Li Xuehua Inventor before: Xu Mingming Inventor before: Luo Cheng Inventor before: Huang Jiuzhu Inventor before: Guo Qian |