CN105759299B - A kind of constant temperature mould device for the development dosimeter performance study on electron beam - Google Patents
A kind of constant temperature mould device for the development dosimeter performance study on electron beam Download PDFInfo
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- CN105759299B CN105759299B CN201610286463.8A CN201610286463A CN105759299B CN 105759299 B CN105759299 B CN 105759299B CN 201610286463 A CN201610286463 A CN 201610286463A CN 105759299 B CN105759299 B CN 105759299B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/02—Dosimeters
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- G—PHYSICS
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- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T7/00—Details of radiation-measuring instruments
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Abstract
The invention belongs to dose of radiation technical fields, disclose a kind of for carrying out the constant temperature mould device of dosimeter Dosimetric characteristics research on electron beam.The applicable beam energy range of the device is 10MeV or more；The device includes radiation phantom, water circulation system and temperature control system, and wherein water circulation system is connect with radiation phantom and temperature control system respectively.The device can carry out dosimeter Dosimetric characteristics research especially temperature-responsive on the electronic beam current that electron linear accelerator is drawn and study, to be modified to dosimetric parameters such as absorbed doses.
Description
Technical field
The invention belongs to dose of radiation technical fields, and in particular to one kind on electron beam for carrying out dosimeter dosimeter
The constant temperature mould device of performance study.
Background technique
With the development of radiation processing technology, more and more60Co Dynarad, electron accelerator are established,
How accurately and reliably to measure by according to absorbed dose suffered in product, the technological parameter of irradiation devices is monitored and controlled, improves
Irradiation quality has become metrological supervision department and irradiates the problem of unit is paid close attention to jointly.
Currently used for60The dosimeter that Co gamma-rays, the supervision of electron beam middle dosage measure is just like liquid chemical dosimeter, radiation
Optically variable films dosimeter, CTA film dosimeter, alanine dosemeter etc., dose response when these variety classes dosimeters irradiate
It may be subjected to the influence of irradiation temperature.Therefore, when studying dosimeter Dosimetric characteristics, it is necessary to study its irradiation temperature and ring
It answers, determines that dosimeter responds variation with temperature trend.When research finds that the dosimeter irradiation temperature response coefficient be can not ignore
When, it is necessary to irradiation temperature is monitored to be modified to absorbed dose measurement result.
Stability in view of cobalt source relative to electron beam irradiation, for lower range (≤104Gy dosimeter) is such as
The response experiment of the irradiation temperatures such as liquid chemical dosimeter, alanine dosemeter generally exists60It is carried out under Co gamma-ray irradiation.And for
High range (104-106Gy dosimeter), when doing temperature-responsive experiment, since irradiation dose is quite high, if cobalt source irradiates position
It is low to set place's dosage rate, doing the irradiation time that a temperature response curve expends will especially grow, it may be necessary to which ten days even longer
And expense is very high.And electron beam compares cobalt source, it is advantageous that radiation dose rate is 103-105Gy/s is even higher, irradiation effect
Rate is high, and irradiation is at low cost, is based on this, can carry out high range (10 on electron beam4-106Gy) the irradiation temperature response of dosimeter is ground
Study carefully.
But it is not yet at home and abroad found on pertinent literature and carries out dosimeter temperature using electron linear accelerator electron beam
Respond the method and device information of experiment.
Summary of the invention
(1) goal of the invention
According to the problems of prior art, the present invention provides a kind of electron beams drawn in electron linear accelerator
Carry out the constant temperature mould device of dosimeter Dosimetric characteristics research especially temperature-responsive research on stream.
(2) technical solution
In order to solve the problems of prior art, technical solution provided by the invention is as follows：
For carrying out the constant temperature mould device of dosimeter Dosimetric characteristics research, the applicable electronics of the device on electron beam
Beam energy range is 10MeV or more；The device includes radiation phantom, water circulation system and temperature control system, and wherein water recycles
System is connect with radiation phantom and temperature control system respectively；
The radiation phantom mainly includes the radiation phantom main body of middle section and water inlet pipe, outlet pipe positioned at two sides；
Radiation phantom main body is hollow rectangular shape, and mainly by sealing welding, top panel, lower panel and intermediate frame are formed together,
Wherein top panel or lower panel can be used as irradiation face, and the side interior welds of intermediate frame, which have, accommodates column for placing dosimeter
Dosimeter casing and thermometer boss for placing thermometer, dosimeter accommodate in column for placing dosimeter；The dosage
It counts casing and thermometer wrap tube shape is consistent with structure, wall thickness is 0.8~1.2mm, and internal diameter is 10~12mm, and axial length is spoke
According to the 1/3~1/2 of die body top panel length, and one end seals, another end opening and together with intermediate frame sealing welding；
The quantity of the thermometer boss is 1 or more, is used for monitoring temperature distribution situation；The quantity of the dosimeter casing is 1
Or it is multiple, the distance in radial center distance irradiation face and the thickness for irradiating face will meet dosimeter under this kind of beam energy
Absorbed dose is consistent with the irradiation absorbed dose of face outer surface；The water inlet pipe, outlet pipe are respectively welded at the two of intermediate frame
Side, and inlet opening is provided on water inlet pipe, apopore is provided on outlet pipe；
The water circulation system includes water circulation water inlet pipe, water recycling outlet, wherein water circulation water inlet pipe and water circulation
One end of outlet pipe is connect with the apopore of the inlet opening of radiation phantom water inlet pipe and radiation phantom outlet pipe respectively, the other end with
Temperature control system positioned at control room connects；Water circulation system controls water (flow) direction and flows through radiation phantom from water circulation water inlet pipe
The inlet opening of water inlet pipe, radiation phantom water inlet pipe, radiation phantom main body, radiation phantom outlet pipe, radiation phantom outlet pipe go out
It is recycled again after water hole, the outflow of water recycling outlet.
Preferably, the temperature control system includes adjustable temp-controller and water circulating pump of the temperature control range at 0-60 DEG C,
To guarantee that water temperature is invariable in radiation phantom.
Preferably, when beam energy is 10MeV, the wall thickness of the dosimeter casing and thermometer boss is 1mm, internal diameter
For 12mm, axial length is the 1/2 of radiation phantom top panel length, its radial center distance irradiation face of dosimeter casing away from
From for 21mm, irradiate face with a thickness of 2mm.
Preferably, the material of the radiation phantom main body is aluminium.
Preferably, the water circulation water inlet pipe and water recycling outlet are all covered with insulating layer, and insulating layer is polyphenyl second
Alkene.
Preferably, the water inlet pipe and outlet pipe of the radiation phantom two sides include U-tube, the both ends of U-tube respectively with
Intermediate frame is welded, and is welded with straight tube at the geometric center of U-tube, is respectively arranged with inlet opening and apopore on straight tube.
Preferably, the dosimeter will the equalized temperature 20~carry out electronics again after forty minutes in constant temperature mould device in advance
Line irradiation.
Preferably, the dosimeter, which accommodates, places multiple groups dosimeter in column.
(3) beneficial effect
Constant temperature mould device provided by the invention flows down the dosage for carrying out dosimeter suitable for the Electron Beam of 10MeV or more
Learn performance study, especially temperature-responsive study, have the advantage that for：
(1) radiation phantom main body and water inlet pipe positioned at two sides and outlet pipe are sealed using welding manner, it is ensured that irradiation
It is full of water in die body main body and does not reveal, it is ensured that the accuracy of dosimeter performance study.
(2) according to beam current energy size, the distance and spoke in the radial center distance irradiation face of dosimeter casing are designed
The thickness shown up keeps the absorbed dose of dosimeter under this kind of beam energy consistent with the irradiation absorbed dose of face outer surface；Than
Under 10MeV beam energy, according to dose-depth distribution curve of the electron beam in aluminium, the wall thickness of dosimeter casing is designed
It is selected as 1mm, the distance of internal diameter 12mm, the radial center distance irradiation face of dosimeter casing are 21mm, and irradiation face thickness is
2mm, wherein the absorbed dose of dosimeter be with the consistent reason of the irradiation absorbed dose in face：
According to Depth-dose curve curve of the electron beam under 10MeV energy in aluminium, sees Fig. 2, can be calculated and work as electronics
Beam incidence depth reaches optimum thickness Ropt, when being 9.7mm, the depth absorbed dose and irradiating surface, that is, depth absorb when being 0
Dosage is consistent.Therefore it for different-energy electron beam, is absorbed to meet die body casing middle dosage meter absorbed dose and incidence surface
Optimum thickness R can be calculated according to electron beam Depth-dose curve curve under corresponding energy in the consistent requirement of dosageOpt,Again
The distance in the radial center distance irradiation face of dosimeter casing is determined by density conversion.
(3) water circulation system control water flow is passed in and out by inlet opening and apopore, and is provided with U-shaped water inlet pipe and water outlet
Pipe, increases circulating water flow, improves the consistency of the main body temperature of radiation phantom.
(4) material of radiation phantom main body is selected as the lower metallic aluminium of density, and radiation-resistant property is good and easy to process.
(5) it is provided with one or more dosimeter casings and thermometer boss in radiation phantom main body, can be used for placing dosage
Meter and thermometer, can be to the irradiation simultaneously of multiple dosimeters and the monitoring of temperature.
Detailed description of the invention
Fig. 1 is radiation phantom partial cutaway schematic provided by the present application；Wherein 1 is thermometer boss；2 be that dosimeter holds
Receive column；3 be intermediate frame；4 be inlet opening；5 be water inlet pipe；6 be top panel；7 be dosimeter casing；8 be lower panel；9 be
Water pipe；10 be apopore；
Fig. 2 is Depth-dose curve curve of the electron beam of 10MeV energy provided by the present application in aluminium.
Specific embodiment
The application is further elaborated below in conjunction with specification drawings and specific embodiments.
Embodiment 1
For carrying out the constant temperature mould device of dosimeter Dosimetric characteristics research on electron beam, beam energy is
10MeV, the device include radiation phantom, water circulation system and temperature control system, wherein water circulation system respectively with irradiation mould
Body and temperature control system connection.
The structure of the radiation phantom is as shown in Figure 1, mainly the radiation phantom main body including middle section and be located at two sides
Water inlet pipe 5, outlet pipe 9；The material of radiation phantom main body is aluminium, and shape is hollow rectangular shape, mainly by sealing welding
Top panel 6, lower panel 8 and intermediate frame 3 form together, and wherein top panel 6 or lower panel 8 can be used as irradiation face, intermediate
The side interior welds of framework 3 have the dosimeter casing 7 for placing dosimeter receiving column 2 and the temperature for placing thermometer
Casing 1 is counted, dosimeter accommodates in column 2 for placing multiple groups dosimeter；The dosimeter casing 7 and 1 shape of thermometer boss and wall
Thick consistent, wall thickness 1mm, internal diameter 12mm, axial length are the 1/2 of radiation phantom top panel length, and one end seals, separately
It is open at one end and with opening 3 sealing welding of surrounding intermediate frame together with；The quantity of the thermometer boss 1 is 2, for supervising
Testing temperature distribution situation；The quantity of the dosimeter casing 7 is 1, and the distance in radial center distance irradiation face is 21mm, spoke
Show up with a thickness of 2mm, ensure that the absorbed dose one of the absorbed dose of dosimeter under 10MeV beam energy and irradiation face
It causes；The water inlet pipe 5, outlet pipe 9 are respectively welded at the two sides of intermediate frame 3, and water inlet pipe 5, outlet pipe 9 include U-tube, U
The both ends of type pipe are welded with intermediate frame 3 respectively, are welded with straight tube at the geometric center of U-tube, be respectively arranged on straight tube into
Water hole 4 and apopore 10.
The water circulation system includes the water circulation water inlet pipe and water cyclic water outlet that surface is covered with polystyrene heat-preservation layer
Pipe, wherein one end of water circulation water inlet pipe and water recycling outlet respectively with the inlet opening 4 of radiation phantom water inlet pipe 5 and irradiation mould
The apopore 10 of body outlet pipe 9 connects, and the other end is connect with the temperature control system for being located at control room；Water circulation system controls water
Flowing direction is the inlet opening 4 that radiation phantom water inlet pipe 5 is flowed through from water circulation water inlet pipe, radiation phantom water inlet pipe 5, radiation phantom master
It is recycled again after body, radiation phantom outlet pipe 9, the apopore 10 of radiation phantom outlet pipe 9, the outflow of water recycling outlet；
The temperature control system includes adjustable temp-controller and water circulating pump of the temperature control range at 0-60 DEG C, to guarantee spoke
It is invariable according to water temperature in die body.The dosimeter will carry out electricity after equalized temperature 30 minutes in constant temperature mould device in advance again
The irradiation of beamlet stream.
All dosimeters to be irradiated are all warm in radiation phantom in advance when carrying out temperature-responsive research using the device
Degree balance 20~irradiate again after forty minutes, and dosimeter is placed on the fixation position in homogeneous beam radiation field, it is stringent to position,
Actual temperature is subject to predose rear mold body temperature.Each temperature corresponding to temperature response curve under one corresponding dosage
Lower electron linear accelerator parameter constant responds bring influence, irradiation process to exclude accelerator line shakiness to dosimeter
It is middle to be tracked with Standard dosimeter so as to line normalizing；Standard dosimeter is placed in outside radiation phantom, is fixed on dosimeter in straight
The transmission tape motion direction of line is maintained at room temperature state in Standard dosimeter temperature irradiation process.
Within the scope of 10~50 DEG C, two various doses (9kGy, 45kGy) are irradiated to Radiochromic film dosimeter to examine
Response of the dosimeter to be measured to irradiation temperature is examined, the results show that raising base of the absorbance change value of dosimeter with irradiation temperature
Linear ascendant trend in sheet, after being fitted gained irradiation temperature response coefficient be 0.2%/DEG C.Therefore, it is measured with the dosimeter
When absorbed dose, in order to obtain more accurate result, it is necessary to be monitored to carry out temperature adjustmemt to irradiation temperature.
Embodiment 2
Unlike the first embodiment, dosimeter dosimeter response investigations are carried out in the case where energy is 12MeV beam energy；
The distance in the radial center distance irradiation face of the dosimeter casing is 34mm.The dosimeter will be in advance in constant temperature mould device
Interior equalized temperature carries out electronic beam current irradiation again after forty minutes.
Claims (6)
1. the constant temperature mould device for carrying out the research of dosimeter Dosimetric characteristics on electron beam, which is characterized in that the device
Applicable beam energy range is 10MeV or more；The device includes radiation phantom, water circulation system and temperature control system,
Wherein water circulation system is connect with radiation phantom and temperature control system respectively；
The radiation phantom mainly includes the radiation phantom main body of middle section and water inlet pipe, outlet pipe positioned at two sides；It is described
Radiation phantom main body is hollow rectangular shape, and mainly by sealing welding, top panel, lower panel and intermediate frame are formed together,
Wherein top panel or lower panel can be used as irradiation face, and the side interior welds of intermediate frame, which have, accommodates column for placing dosimeter
Dosimeter casing and thermometer boss for placing thermometer, dosimeter accommodate column for placing dosimeter；The dosimeter
Casing and thermometer wrap tube shape are consistent with structure, and wall thickness is 0.8~1.2mm, and internal diameter is 10~12mm, and axial length is irradiation
The 1/3~1/2 of die body top panel length, and lower end seals, upper end opening and together with intermediate frame sealing welding；It is described
The quantity of thermometer boss is 1 or more, is used for monitoring temperature distribution situation；The quantity of the dosimeter casing is 1 or more
A, the distance in radial center distance irradiation face and the thickness for irradiating face will meet agent in radiation phantom under this kind of beam energy
The absorbed dose of meter is consistent with the irradiation absorbed dose of face outer surface；The water inlet pipe, outlet pipe are respectively welded at middle boxes
The two sides of body, and inlet opening and apopore are respectively arranged on water inlet pipe and outlet pipe；
The water circulation system includes water circulation water inlet pipe, water recycling outlet and water circulating pump, wherein water circulation water inlet pipe and
One end of water recycling outlet is connect with the apopore of the inlet opening of radiation phantom water inlet pipe and radiation phantom outlet pipe respectively, separately
One end is connect with the temperature control system for being located at control room；Water circulation system controls water (flow) direction and flows through spoke from water circulation water inlet pipe
According to the inlet opening of die body water inlet pipe, radiation phantom water inlet pipe, radiation phantom main body, radiation phantom outlet pipe, radiation phantom water outlet
Apopore, the water recycling outlet of pipe recycle again after flowing out.
2. according to claim 1 for carrying out the constant temperature die body dress of dosimeter Dosimetric characteristics research on electron beam
It sets, which is characterized in that when beam energy is 10MeV, the wall thickness of the dosimeter casing and thermometer boss is 1mm, internal diameter
For 12mm, axial length is the 1/2 of radiation phantom top panel length, its radial center distance irradiation face of dosimeter casing away from
From for 21mm, irradiate face with a thickness of 2mm.
3. according to claim 1 for carrying out the constant temperature die body dress of dosimeter Dosimetric characteristics research on electron beam
It sets, which is characterized in that the material of the radiation phantom main body is aluminium.
4. according to claim 1 for carrying out the constant temperature die body dress of dosimeter Dosimetric characteristics research on electron beam
It sets, which is characterized in that the water circulation water inlet pipe and water recycling outlet are all covered with insulating layer, and insulating layer material is polyphenyl
Ethylene.
5. according to claim 1 for carrying out the constant temperature die body dress of dosimeter Dosimetric characteristics research on electron beam
It sets, which is characterized in that the water inlet pipe and outlet pipe of the radiation phantom two sides include U-tube, and the both ends of U-tube are respectively in
Between framework weld, be welded with straight tube at the geometric center of U-tube, be respectively arranged with inlet opening and apopore on straight tube.
6. according to claim 1 for carrying out the constant temperature die body dress of dosimeter Dosimetric characteristics research on electron beam
It sets, which is characterized in that the dosimeter, which accommodates, places multiple groups dosimeter in column.
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| CN201610286463.8A CN105759299B (en) | 2016-05-03 | 2016-05-03 | A kind of constant temperature mould device for the development dosimeter performance study on electron beam |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203658136U (en) * | 2013-10-24 | 2014-06-18 | 武汉大学 | Heat preservation device and heating heat preservation device for high-temperature ion radiation |
| CN203658138U (en) * | 2014-01-20 | 2014-06-18 | 武汉大学 | Thermal insulation and heating device with multi-beam ion irradiation |
| CN205089641U (en) * | 2015-10-21 | 2016-03-16 | 绍兴泰克精工机电有限公司 | Circulating hot water pump with heating heat preservation effect |
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| EP2848924B1 (en) * | 2013-09-11 | 2016-08-24 | Anton Paar GmbH | Tempering chamber for compact x-ray apparatus |
| US20160053219A1 (en) * | 2014-08-25 | 2016-02-25 | Opgen, Inc. | Systems, methods, and devices for temperature control |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203658136U (en) * | 2013-10-24 | 2014-06-18 | 武汉大学 | Heat preservation device and heating heat preservation device for high-temperature ion radiation |
| CN203658138U (en) * | 2014-01-20 | 2014-06-18 | 武汉大学 | Thermal insulation and heating device with multi-beam ion irradiation |
| CN205089641U (en) * | 2015-10-21 | 2016-03-16 | 绍兴泰克精工机电有限公司 | Circulating hot water pump with heating heat preservation effect |
Non-Patent Citations (2)
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| 辐射变色薄膜剂量计的研制;李华芝等;《原子能科学技术》;20080331;253-257 * |
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