CN103185891A - Accurate measurement device for accelerator ray bundles - Google Patents
Accurate measurement device for accelerator ray bundles Download PDFInfo
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- CN103185891A CN103185891A CN2011104557190A CN201110455719A CN103185891A CN 103185891 A CN103185891 A CN 103185891A CN 2011104557190 A CN2011104557190 A CN 2011104557190A CN 201110455719 A CN201110455719 A CN 201110455719A CN 103185891 A CN103185891 A CN 103185891A
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Abstract
The invention discloses a measurement device for accelerator ray bundles. The measurement device for the accelerator ray bundles comprises an attenuation body device, a detector and a position adjusting device. The attenuation body device is provided with a working part, the working part resists ray bundles from an accelerator target spot and reduces strength of the ray bundles, the detector is used for detecting strength or dosage of the ray bundles which penetrate through the working part of the attenuation body device and the position adjusting device is used for carrying the attenuation body device and the detector and adjusting spatial positions of the attenuation body device and the detector. The thickness of the working part of the attenuation body device is variable, and therefore different attenuation to the strength of the ray bundles is conducted. The attenuation body device with the working part of which the thickness is variable and the position adjusting device for carrying and positioning the attenuation body device and the detector are arranged on the measurement device, and therefore adjustment of the attenuation body device and positioning accuracy of the device are improved.
Description
Technical field
The present invention relates to the accurate measuring equipment of a kind of beam, relate in particular to a kind of accelerator beam measuring equipment.
Background technology
In Application of Nuclear Technology field, particularly container safety inspection system, dosage or the parameters such as dose rate, energy and half-value layer of the beam that frequent needs mensuration electron accelerator is launched.The beam that accelerator emits is sightless and disperses, for example become fan-shaped, taper, rectangle etc., and in accelerator beam energy, half-value layer measuring process, need to use the decay body, mutual alignment relation between detector, decay body and the beam target spot, precision tool for measurement result has a significant impact, and puts variation not in place or the generation mutual alignment in the test process and all will introduce big measuring error.And in the existing measuring method, dosage or dose rate measurement mechanism (detector) and decay body device be the separate device of two covers normally, has the problem of phase mutual interference in the time of need closely cooperating.Therefore need a kind of device to make things convenient for and accurately regulate the relative position of detector, decay body and target spot, can realize preferably comprising that the height of detector and decay body and the Long-distance Control of angle regulate.
In addition, in existing measuring equipment, the square plate that the decay body adopts manual block-by-block to add is regulated damping capacity (decay thickness), and the adjusting of its amount of influence (height and angle) is difficult for realizing, brings than the adult because of error to measurement result.For this reason, need a kind of measuring equipment that can regulate the damping capacity (decay thickness) of decay body easily.
Summary of the invention
One of purpose of the present invention provides a kind of beam measuring equipment that can regulate the damping capacity (decay thickness) of decay body easily and accurately adjust the relative position of detector, decay body and target spot.
In order to realize the foregoing invention purpose, technical scheme of the present invention realizes in the following manner:
According to an aspect of the present invention, provide a kind of accelerator beam measuring equipment, comprising:
The decay body device, it has operate portions, and described operate portions stops that the beam that comes from the accelerator target spot decays with the intensity to this beam;
Detector, it is used for surveying intensity or the dosage of the beam of the operate portions of passing the decay body device; With
Position regulator, it is used for the described decay body device of carrying and described detector and the locus of described decay body device and described detector is adjusted,
Wherein, the thickness of the operate portions of described decay body device is that the variable dosage with to this beam carries out different decay.
Further, described decay body device has rotation, and comprise around two, three, four or more alar part of described rotation layout, described alar part has different thickness, and described decay body device can make different alar parts carry out different decay as operate portions to the intensity of beam by the rotation around described rotation.
Further, described decay body device comprises two, three, four or the more stage portion with different-thickness that is arranged in parallel, and described decay body device can make the stage portion of different-thickness carry out different decay as operate portions to the intensity of beam by translation.
Further, the operate portions of described decay body device has square, circular or polygonal shape.
Further, the center line of described beam is perpendicular to the incidence surface of the operate portions of described decay body device.
Further, the center line of described beam is corresponding to the center of described detector.
Particularly, described position regulator comprises the probe position device, and the movement of the direction that described probe position device can be by being parallel to the beam center line is adjusted described detector and sought the maximum dose response point with respect to the distance of the operate portions of decay body device and/or by the movement perpendicular to the direction of beam center line.
Particularly, the thickness of the operate portions of described decay body device changes in 80mm, 100mm, 120mm and 140mm at least.
Particularly, described probe position device is away from the center of detector or be positioned at outside the position that beam can arrive.
Particularly, described position regulator is adjusted horizontal level, vertical position and the angle of inclination of described decay body device and described detector.
Further, described position regulator is controlled by manual, wired or wireless mode the adjustment at horizontal level, vertical position and the angle of inclination of described decay body device and described detector.
At least one aspect in the technique scheme of the present invention can have the decay body device of operate portions of variable thickness and carrying and location decay body device by setting and improve the decay adjusting of body and the bearing accuracy of described device with the position of detector adjusting gear, thereby provides feasible scheme for Long-distance Control and the full automation of the measurement of accelerator beam.
Description of drawings
Fig. 1 illustrates the schematic structure vertical view according to the accelerator beam measuring equipment of one embodiment of the invention;
Fig. 1 a illustrates the schematic structure vertical view of accelerator beam measuring equipment according to another embodiment of the present invention;
Fig. 2 illustrates the side view of accelerator beam measuring equipment as shown in Figure 1;
Fig. 3 illustrates the synoptic diagram of the locus adjustment of accelerator beam measuring equipment as shown in Figure 1; With
Fig. 4 illustrates the synoptic diagram of measurement result of the energy of one group of accelerator beam.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.In instructions, same or analogous drawing reference numeral is represented same or analogous parts.Following explanation to embodiment of the present invention is intended to present general inventive concept of the present invention is made an explanation with reference to accompanying drawing, and not should be understood to a kind of restriction of the present invention.
The schematically illustrated accelerator beam measuring equipment 100 according to one embodiment of the invention of Fig. 1.This accelerator beam measuring equipment 100 comprises: decay body device 10, detector 11 and position regulator 12.Decay body device 10 has operate portions, and this operate portions stops that the beam 15 that comes from accelerator target spot 14 decays with the intensity to this beam 15.Detector 11 is used for surveying the dosage of the beam of the operate portions of passing decay body device 10.The dosage that detector 11 detects is along with the operate portions of decay body device 10 changes the attenuation degree of the intensity of beam.When the operate portions that is not attenuated body device 10 when beam stops, the dosage maximum that detector 11 detects.And the operate portions of decay body device 10 is more strong to the decay of the intensity of beam, and the dosage that detector 11 detects is just more little.Detector 11 can adopt various ways, for example the detector pen.Position regulator 12 is used for the described decay body device 10 of carrying and described detector 11 and the locus of described decay body device 10 and described detector 11 is adjusted, thereby makes decay body device 10 and detector 11 to have correct relative with respect to accelerator target spot 14 and beam 15.
In order to measure the dosage of beam under different damp conditions, the operate portions of decay body device 10 can have variable thickness, and the operate portions of different-thickness is for the decay difference of beam.Thickness is more big, and is also more big to the decay of beam.The mode that changes the thickness of operate portions has multiple.Shown in Fig. 1 is revolving decay body device.This decay body device has rotation 16, and comprises four alar parts 17 arranging around described rotation.Described alar part 17 has different thickness.Decay body device 10 can make different alar part 17 carry out different decay as operate portions to the intensity of beam by the rotation (four-headed arrow as the bending among Fig. 1 is represented) around described rotation 16.Decay body device 10 can make required alar part 17 aim at beam 15 by rotation and translation, realizes the intensity of beam 15 is carried out required decay to stop its path.Have four alar parts 17 although decay body device 10 only is shown in Fig. 1, the body device of decaying also can have two, three, five or more alar part, with the various possible variation of the thickness of realization operate portions.
The schematically illustrated accelerator beam measuring equipment 101 according to another embodiment of the present invention of Fig. 1 a.This accelerator beam measuring equipment 101 adopts the decay body device of another kind of form, i.e. the decay body device of step, and it comprises a plurality of stage portion with different-thickness that are arranged in parallel.In this case, the decay body device can make the stage portion of different-thickness aim at beam by translation (preferably along the direction perpendicular to beam), as operate portions the intensity of beam is carried out different decay, thereby realize the variation in thickness of operate portions.Three stage portion that are arranged in parallel only are shown among Fig. 1 a, but two, four or more stage portion also can be set.Can be (as shown in Figure 1a) of adjacency between the adjacent stage portion, also can be separated mutually by structures such as groove, slopes.
Adopt the decay body device 10 of above-mentioned variable thickness, when changing the damping capacity of decay body, do not need dismounting and change the decay body device, and only need adjust the thickness of its operate portions, this avoided dismounting decay body device the differential declines body that may cause compatibility issue, reorientate and the adjustment problem, and improved measurement efficient.
The operate portions of decay body device 10 can have shapes such as square, circle or polygon.The operate portions of decay body device 10 can be by constituting such as various attenuating materials such as steel, lead, aluminium or lead-antimony alloys.The variation in thickness of the operate portions of decay body device 10 can have two kinds, three kinds, four kinds or more kinds of.For example, in the beam of 0～10MV accelerator energy is measured, can select 80mm, 100mm, 120mm and 140mm thickness as the possible thickness of operate portions.But the thickness of operate portions is not limited thereto, and shape, thickness and other physical dimension of the operate portions of decay body device 10 can be selected and sets according to the test request of beam.The rotation of decay body device 10 and translation can be by corresponding drive unit or manual the realizations.
Because beam comes from the accelerator target spot, so it has certain diversity.In order to guarantee the consistance of measurement result, beam can pass operate portions with identical angle.Cause measuring error for the ease of measuring and select the thickness of operate portions and preventing that beam from tiltedly wearing, can make the center line of described beam 15 perpendicular to the incidence surface of the operate portions of described decay body device 10.Similarly, the exit surface of the operate portions of decay body device 10 also can be arranged to vertical with the center line of described beam 15, vertically passes in and out the operate portions of decay body device 10 to guarantee beam 15.
In the measurement for dosage or dose rate, in order exactly detector to be placed on the maximum dose point place of beam, the center of detector 11 can be adjusted to corresponding with the center line of beam, as shown in Figure 2.That is, make on the center line that is centered close to beam of detector 11.10 of body devices of decay can be between accelerator target spot 15 and detector 11.
Described position regulator 12 can comprise probe position device 13.In one embodiment, position regulator 12 can at first be adjusted horizontal level, vertical position and the angle of inclination of described decay body device 10 and described detector 11 integral body.For example, as shown in Figure 3, all the center line with beam is vertical with detector 11 for body device 10 so that decay can to adjust the angle of inclination of described decay body device 10 and described detector 11.In dosage or dose rate measuring process, in order to reflect the output dose rate of accelerator more accurately, expectation is placed on beam maximum dose point with detector.Described probe position device 13 can be by being parallel to the beam center line the movement of direction adjust described detector 11 and seek the maximum dose response point with respect to the distance of the operate portions of decay body device 10 and/or by the movement perpendicular to the direction of beam center line, to improve the accuracy of measuring.In addition, can also make probe position device 13 away from the center of detector 11 or be positioned at outside the position that beam can arrive, this can prevent or reduce because it exerts an influence to detector for the scattering of beam.
The rotation of the adjustment at horizontal level, vertical position and the angle of inclination of 12 pairs of described decay body devices 10 of above-mentioned position regulator and described detector 11, decay body device 10 or translation and the movement of detector 11 on above-mentioned both direction can be controlled by manual, wired or wireless mode.Can realize the Long-distance Control to accelerator beam measuring equipment thus.
The invention provides a kind of use accelerator beam measuring equipment according to the present invention and measure the illustrative methods of the energy of accelerator X-ray beam, described method comprises step: decay body device 10 is provided, it has operate portions, and described operate portions stops that the X-ray beam 15 that comes from accelerator target spot 14 decays with the intensity to this X-ray beam 15; Detector 11 is provided, and it is used for surveying the dosage of the X-ray beam of the operate portions of passing decay body device 10; Position regulator 13 is provided, and it is for carrying described decay body device 10 and described detector 11 and the locus of described decay body device 10 and described detector 11 being adjusted; Carry out different decay with the thickness of operate portions by changing described decay body device 10 with the intensity to this X-ray beam.
Can also utilize position regulator according to the elevation angle of the center line of accelerator X-ray beam the angle of inclination of decay body device and detector is adjusted so that the center line of acceleration X-ray beam perpendicular to the incidence surface of the operate portions of decay body device.
And then, can also utilize position regulator vertically highly adjusting detector, and by the probe position device detector is being adjusted perpendicular to the position on the direction of X-ray beam center line, so that the detector center is corresponding with accelerator X-ray beam center line.
In order to determine energy and the attenuation multiple of X-ray beam, above-mentioned measuring method can also may further comprise the steps: under the situation that the decay body is not set on the X-ray beam passage, come mobile detector 11 by control probe position device 13, find corresponding to maximum dose rate D
0The position of (dose rate is the radiation dose that absorbs or receive in the unit interval), and detector 11 is locked in this position; The thickness of operate portions of decay body device is arranged to minimum thickness d
1, and stopping beam with described operate portions, the beam dose rate of passing described operate portions that measures at detector is D
1The thickness of the operate portions of change decay body device is to measure corresponding beam dose rate at detector, the thickness of wherein measuring corresponding operate portions for the i time is d
i, measuring corresponding beam dose rate is D
iCalculate each thickness d of operate portions respectively
iCorresponding attenuation multiple D
0/ D
i, form and measure curve, will measure the energy that curve and reference curve compare to judge the accelerator X-ray beam.
Although at first begin to measure from the operate portions of thickness minimum in the above-mentioned measuring process, also can be as required begin measurement from the operate portions of other thickness.
Provided exemplary curve (KD curve) figure that accelerator X-ray beam attenuation multiple changes with the thickness of decay body (operate portions) among Fig. 4.In the embodiment of Fig. 4, adopted steel plate as the attenuating material of decay body running portion, measured the dose rate of the X-ray beam of the operate portions of under operate portions thickness is the situation of 80mm, 100mm, 120mm and 140mm thickness, passing the decay body device.Again according to above-described definition, draw corresponding attenuation multiple by the dose rate that measures under the situation that the decay body is not set on the X-ray beam passage respectively with the merchant who at operate portions thickness is the dose rate that records under the situation of 80mm, 100mm, 120mm and 140mm thickness, the attenuation multiple under resulting four kinds of situations is drawn the measurement curve corresponding to corresponding operate portions thickness (steel plate thickness).Also showing simultaneously among Fig. 4 corresponding to energy is four reference curves of the X-ray beam of 2.5MV, 3.0MV, 3.5MV and 4.0MV, so that relatively.As can be seen from Figure 4, the variation tendency of the measurement curve of gained is between the reference curve of 3.0MV and 3.5MV.That is, the energy of measured X-ray beam correspondence is between 3.0MV and 3.5MV.Through estimating that relatively the energy that can draw measured X-ray beam correspondence is about 3.2MV.In measuring process, the setting of decay body device and detector can draw according to the description of the aforementioned part of this instructions.
Although adopted the KD curve method to come the energy of measured X beam in above-described embodiment,, should be appreciated that the energy that also can be used for coming with other method the measured X beam according to measuring equipment of the present invention, such as the half-value layer method etc.
Those skilled in the art are to be understood that, the energy of X-ray beam is a kind of equivalent energy saying, it does not represent all X ray actual energies of institute's survey accelerator emission, because the X-ray beam energy that accelerator produces is the power spectrum of a continuum, is not single energy.So the accelerator energy of the measured beam correspondence that draws in above-mentioned embodiment shown in Figure 4 is about 3.2MV and can be understood as, the X ray energy that this accelerator provides the electron beam of energy 3.2MeV to practice shooting and produce.Megavolt (MV) is commonly used to represent accelerator energy, and for electron accelerator, it is the X ray energy that the electron beam of 1 million-electron-volt (MeV) is practiced shooting and produced that the accelerator energy of 1MV represents to provide energy.
Yet, it will be appreciated by those skilled in the art that this embodiment is exemplary, above-mentioned measuring equipment of the present invention and measuring method also can be applied to measure other beam except X ray that accelerator sends, as electron beam, ion beam etc.
Though describe the present invention by reference to the accompanying drawings, disclosed embodiment is intended to the preferred embodiment for the present invention is carried out exemplary illustration in the accompanying drawing, and can not be interpreted as a kind of restriction of the present invention.
Though some embodiment of general plotting of the present invention are shown and explanation, those skilled in the art will appreciate that, under the situation of the principle that does not deviate from this present general inventive concept and spirit, can make a change these embodiment, scope of the present invention limits with claim and their equivalent.
Claims (11)
1. accelerator beam measuring equipment comprises:
The decay body device, it has operate portions, and described operate portions stops that the beam that comes from the accelerator target spot decays with the intensity to this beam;
Detector, it is used for surveying intensity or the dosage of the beam of the operate portions of passing the decay body device; With
Position regulator, it is used for the described decay body device of carrying and described detector and the locus of described decay body device and described detector is adjusted,
Wherein, the thickness of the operate portions of described decay body device is that the variable intensity with to this beam is carried out different decay.
2. accelerator beam measuring equipment according to claim 1, it is characterized in that, described decay body device has rotation, and comprise around two, three, four or more alar part of described rotation layout, described alar part has different thickness, and described decay body device can make different alar parts carry out different decay as operate portions to the intensity of beam by the rotation around described rotation.
3. accelerator beam measuring equipment according to claim 1, it is characterized in that, described decay body device comprises two, three, four or the more stage portion with different-thickness that is arranged in parallel, and described decay body device can make the stage portion of different-thickness carry out different decay as operate portions to the intensity of beam by translation.
4. accelerator beam measuring equipment according to claim 1 is characterized in that, square, circular or polygonal shape that the operate portions of described decay body device has.
5. accelerator beam measuring equipment according to claim 1 is characterized in that the center line of described beam is perpendicular to the incidence surface of the operate portions of described decay body device.
6. accelerator beam measuring equipment according to claim 5 is characterized in that the center line of described beam is corresponding to the center of described detector.
7. according to each described accelerator beam measuring equipment among the claim 1-6, it is characterized in that, described position regulator comprises the probe position device, and the movement of the direction that described probe position device can be by being parallel to the beam center line is adjusted described detector and sought the maximum dose response point with respect to the distance of the operate portions of decay body device and/or by the movement perpendicular to the direction of beam center line.
8. according to each described accelerator beam measuring equipment among the claim 1-6, it is characterized in that the thickness of the operate portions of described decay body device changes at least in 80mm, 100mm, 120mm and 140mm.
9. according to each described accelerator beam measuring equipment among the claim 1-6, it is characterized in that described probe position device is away from the center of detector or be positioned at outside the position that beam can arrive.
10. according to each described accelerator beam measuring equipment among the claim 1-6, it is characterized in that described position regulator is adjusted horizontal level, vertical position and the angle of inclination of described decay body device and described detector.
11. accelerator beam measuring equipment according to claim 10, it is characterized in that described position regulator is controlled by manual, wired or wireless mode the adjustment at horizontal level, vertical position and the angle of inclination of described decay body device and described detector.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310690376.5A CN103645494B (en) | 2011-12-30 | 2011-12-30 | Measure the method for the energy of accelerator beam |
| CN201110455719.0A CN103185891B (en) | 2011-12-30 | 2011-12-30 | The accurate metering facility of accelerator bundle of rays |
| HK13113215.7A HK1185951A1 (en) | 2011-12-30 | 2013-11-26 | Accurate measurement device for accelerator ray bundles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110455719.0A CN103185891B (en) | 2011-12-30 | 2011-12-30 | The accurate metering facility of accelerator bundle of rays |
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| CN201310690376.5A Division CN103645494B (en) | 2011-12-30 | 2011-12-30 | Measure the method for the energy of accelerator beam |
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| CN103185891A true CN103185891A (en) | 2013-07-03 |
| CN103185891B CN103185891B (en) | 2016-06-08 |
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| CN201110455719.0A Active CN103185891B (en) | 2011-12-30 | 2011-12-30 | The accurate metering facility of accelerator bundle of rays |
| CN201310690376.5A Active CN103645494B (en) | 2011-12-30 | 2011-12-30 | Measure the method for the energy of accelerator beam |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104459754A (en) * | 2014-12-18 | 2015-03-25 | 清华大学 | Online measurement method of X-ray energy of accelerator of container inspection system |
| CN104634796A (en) * | 2014-12-11 | 2015-05-20 | 清华大学 | Alignment system and alignment method for container or vehicle inspection system |
| CN109828299A (en) * | 2019-03-19 | 2019-05-31 | 山东大学 | A kind of gamma-rays dosage rate angle positioning device and method |
| CN111913209A (en) * | 2020-08-13 | 2020-11-10 | 中国原子能科学研究院 | Ray beam energy measuring system and method for measuring ray beam energy |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104237927B (en) * | 2014-09-05 | 2016-08-31 | 兰州空间技术物理研究所 | A kind of variable element test system of caesium source emission current intensity |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104634796A (en) * | 2014-12-11 | 2015-05-20 | 清华大学 | Alignment system and alignment method for container or vehicle inspection system |
| EP3032288A1 (en) * | 2014-12-11 | 2016-06-15 | Tsinghua University | Alignment system and method for container or vehicle inspection system |
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| CN109828299A (en) * | 2019-03-19 | 2019-05-31 | 山东大学 | A kind of gamma-rays dosage rate angle positioning device and method |
| CN109828299B (en) * | 2019-03-19 | 2023-11-24 | 山东大学 | Gamma ray dosage rate angle positioning device and method |
| CN111913209A (en) * | 2020-08-13 | 2020-11-10 | 中国原子能科学研究院 | Ray beam energy measuring system and method for measuring ray beam energy |
| CN111913209B (en) * | 2020-08-13 | 2023-03-07 | 中国原子能科学研究院 | Ray beam energy measuring system and method for measuring ray beam energy |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103645494B (en) | 2016-04-06 |
| HK1185951A1 (en) | 2014-02-28 |
| CN103185891B (en) | 2016-06-08 |
| CN103645494A (en) | 2014-03-19 |
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