CN105068110B - A kind of new beam detector - Google Patents
A kind of new beam detector Download PDFInfo
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- CN105068110B CN105068110B CN201510542439.1A CN201510542439A CN105068110B CN 105068110 B CN105068110 B CN 105068110B CN 201510542439 A CN201510542439 A CN 201510542439A CN 105068110 B CN105068110 B CN 105068110B
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- line
- metallic plate
- scintillator panel
- beam detector
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Abstract
A kind of new beam detector, including housing, metallic plate, scintillator panel and CCD camera.A detection cavity is equipped with the housing, the both sides of the detection cavity are respectively used to be equipped with line entrance port and line exit portal for line disengaging, and the line entrance port and line exit portal are located along the same line, and the upper end of the detection cavity is equipped with detecting window；Metallic plate is articulated with housing by shaft, and the metallic plate is between line entrance port and line exit portal, and the metallic plate can be moved stopping between the first position of line and the second place for avoiding line, which is grounded by galvanometer；Scintillator panel is fixedly arranged on metallic plate side；CCD camera is installed on the outside of detecting window and is sent for detection by scintillator panel and pass through the light of detecting window.The measurement of the present invention is feature-rich, and cost is low, and easily batch production, several detectors can be installed in beam line, whole beam line quality of beam is monitored, and easy to use.
Description
Technical field
The present invention relates to a kind of new beam detector.
Background technology
Proton heavy particle radiotherapy cancer is higher than conventional radiotheraphy precision, small to normal cellular damage.Its therapeutic system and
Correlation technique is developed rapidly in recent decades.Often to be arranged in order to ensure higher quality of beam, on its beam corridor more
A, a variety of detectors, to detect beam parameters, and feedback data is adjusted accordingly to control system, obtains can be used in treating
The line of cancer.
The existing detector for beam diagnostics generally comprises Faraday cup, ionisation chamber, position sensor etc., for surveying
The stream of amount line is strong, energy, position, shape, the parameter such as emittance.However, although Faraday cup cost is relatively low, test function
Single, ionisation chamber, position sensor are although feature-rich, but processing and manufacturing difficulty is larger, of high cost and complicated, right
The ability and competency profiling of user is high.
The content of the invention
In view of the deficiencies of the prior art, the purpose of the present invention is intended to provide a kind of new beam detector, detecting function
Abundant, cost is low, and easy to use.
To achieve the above object, the present invention adopts the following technical scheme that：
A kind of new beam detector, including：
Housing, the housing is interior to be equipped with a detection cavity, and the both sides of the detection cavity are respectively provided with the line for line disengaging
Entrance port and line exit portal, the line entrance port and line exit portal are located along the same line, and the upper end of the detection cavity is equipped with
Detecting window；
The metallic plate being articulated with by shaft on housing, the metallic plate between line entrance port and line exit portal,
And the metallic plate can be moved stopping between the first position of line and the second place for avoiding line, which passes through electricity
Flowmeter is grounded；
The scintillator panel of metallic plate side is fixedly arranged on, for being irradiated when metallic plate is located at first position by line；
CCD camera, is installed on the outside of detecting window and is sent for detection by scintillator panel and pass through the light of detecting window.
The upper end of the detection cavity is equipped with two detecting windows, which is respectively arranged in the surface and tiltedly of detection cavity
Top.
The upper end of metallic plate is articulated with housing by shaft, when which is located at first position, scintillator panel position
In metallic plate close to the side of line entrance port；When the metallic plate is located at the second place, metallic plate is located at the top of the line, dodges
Bright dignity plate is located at the top of metallic plate.
The lower end of metallic plate is articulated with housing by shaft, when which is located at first position, scintillator panel position
In metallic plate close to the side of line entrance port；When the metallic plate is located at the second place, metallic plate is located at the lower section of the line, dodges
Bright dignity plate is located at the top of metallic plate.
The side of the metallic plate close to scintillator panel is further opened with groove, and tungsten silk screen, metal are provided with the groove
Insulation board is also folded between plate and scintillator panel, which is equipped with the opening for being communicated in groove.
Plate bias voltage is also folded between metallic plate and insulation board, which is connected to negative high voltage.
The inner side of detecting window is equipped with lens, which is used for the areas imaging for adjusting CCD camera.
The new beam detector further includes driving mechanism, which is used to drive the shaft to rotate.
Side of the metallic plate away from scintillator panel is additionally provided with resistance device, and the both ends of resistance device are connected to metallic plate
And galvanometer, when which is located at first position, the length direction of the resistance device is with the direction of illumination of the line positioned at same
On straight line.
Be additionally provided with hatch on the side of the detection cavity, be additionally provided with the housing and set the hatch door of the hatch for covering, hatch door with
Sealing ring is folded between housing, which is equipped with motor vacuum adapter and signal converting head.Beneficial effects of the present invention
It is：
Compared with the prior art, in the use of the present invention, operator drives metallic plate to turn to first by rotating shaft
Position, line enter from line entrance port, are irradiated on scintillator panel, and scintillator sends glimmering under particle or ray bombardment
Light, by CCD camera detect the scintillator panel produce light, and using optical imagery method measure line position and
Cross sectional shape, the charged particle in line through scintillator panel is collected by metallic plate, and the stream of line is measured by galvanometer
By force, when that need not measure, metallic plate only need to be turned to the second place, line can be projected from line exit portal, do not influenced
The normal work of line, measurement of the invention is feature-rich, and cost is low, and easily batch production, can install several in beam line
The detector, is monitored whole beam line quality of beam, and easy to use, easy to operate.
Brief description of the drawings
Fig. 1 is the structure diagram of the present invention；
Fig. 2 is the structure diagram of metallic plate and scintillator panel (showing internal structure) in the present invention；
Fig. 3 is the operation principle schematic diagram of the present invention；
Fig. 4 is that in the structure diagram of measuring state, (metallic plate is located at first to the first embodiment of the invention
Put)；
Fig. 5 is structure diagram of Fig. 4 illustrated embodiments in non-measured state (metallic plate is located at the second place)；
Fig. 6 is that (metallic plate is located at first to second of embodiment of the invention in the structure diagram of measuring state
Put)；
Fig. 7 is structure diagram of Fig. 6 illustrated embodiments in non-measured state (metallic plate is located at the second place)；
Wherein：10th, housing；11st, detection cavity；111st, line entrance port；112nd, line exit portal；113rd, detecting window；114、
Fixing bracket；115th, hatch door；1151st, motor vacuum adapter；1152nd, signal converting head；20th, metallic plate；21st, groove；30th, dodge
Bright dignity plate；40th, CCD camera；50th, shaft；60th, galvanometer；70th, insulation board；80th, plate bias voltage；90th, lens；100th, driving machine
Structure；110th, resistance device.
Embodiment
In the following, with reference to attached drawing and embodiment, the present invention is described further：
As shown in Figures 1 to 7, new beam detector of the invention, including housing 10, metallic plate 20, scintillator panel
30 and CCD camera 40.A detection cavity 11 is equipped with the housing 10, the both sides of the detection cavity 11 are respectively used to for line A disengaging
Equipped with line entrance port 111 and line exit portal 112, the line entrance port 111 and line exit portal 112 are located at same straight line
On, the upper end of the detection cavity 11 is equipped with detecting window 113；Metallic plate 20 is articulated with housing 10 by shaft 50, the metallic plate 20
Between line entrance port 111 and line exit portal 112, and the metallic plate 20 (can be surveyed in the first position for stopping line A
Amount state) moved between the second place (non-measured state) of avoidance line A, which is grounded by galvanometer 60；
Scintillator panel 30 is fixedly arranged on 20 side of metallic plate, for being irradiated when metallic plate 20 is located at first position by line A；CCD phases
Machine 40 is installed on the outside of detecting window 113 and is sent for detection by scintillator panel 30 and pass through the light of detecting window 113.
In the use of the present invention, operator drives metallic plate 20 to turn to first position by rotating shaft 50, line A from
Line entrance port 111 enters, and is irradiated on scintillator panel 30, and scintillator sends fluorescence under particle or ray bombardment, passes through
CCD camera 40 detects the light that the scintillator panel 30 produces, and measures the position of line A using the method for optical imagery and cut
Face shape, the charged particle in line A through scintillator panel 30 is collected by metallic plate 20, and measures line by galvanometer 60
The stream of A is strong, when that need not measure, metallic plate 20 only need to be turned to the second place, line A can be from line exit portal 112
Project, do not influence the normal work of line A, measurement of the invention is feature-rich, and cost is low, easily batch production, can be in line
Several detectors are installed on line, whole beam line quality of beam is monitored, and it is easy to use, it is easy to operate.
How to be existed using the method for optical imagery to measure the position of line A and cross sectional shape for those skilled in the art
The technological means that the application can realize on the basis of recording, details are not described herein.
Further, housing 10 has enough spaces to place scintillator panel 30 and metallic plate 20, and at least 0-45 °
Rotation space.Detection cavity inside dimension is 133*133*133mm, and wall thickness 10mm, material is aluminium alloy.
Further, the material of metallic plate 20 is steel.
Further, scintillator plane of illumination is carved with positioning grid lines.
Further, the species of line A includes the charged particle beams such as proton, heavy ion, electronics.
Further, the quantity of detecting window 113 can be multiple that such a detecting window 113 is surveyed using CCD camera 40
During amount, detecting window 113 in addition can be used for observing the situation inside detection cavity 11；Certainly, to make measurement relatively reliable, also may be used
To be measured at the same time using two detecting windows 113.Preferably, the upper end of the detection cavity 11 is equipped with two detecting windows 113, this two
A detecting window 113 is respectively arranged in the surface and oblique upper of detection cavity 11.
Metallic plate 20 can be articulated with housing 10 by different mounting means.
As a kind of embodiment, the upper end of metallic plate 20 is articulated with housing 10 by shaft 50, the metallic plate 20
When first position, scintillator panel 30 is located at metallic plate 20 close to the side of line entrance port 111；The metallic plate 20 is positioned at the
During two positions, metallic plate 20 is located at the top of line A, and scintillator panel 30 is located at the top of metallic plate 20.When being not required to measurement,
Metallic plate 20 can turn to the outside of line A, and scintillator panel 30 is located at the top of metallic plate 20, such metallic plate 20
It can play a protective role to scintillator panel 30, reduce KPT Scatter and radiated caused by scintillator, flicker dignity can be improved
The service life of plate 30.
As another embodiment, the lower end of metallic plate 20 is articulated with housing 10 by shaft 50, the metallic plate 20
During positioned at first position, scintillator panel 30 is located at metallic plate 20 close to the side of line entrance port 111；The metallic plate 20 is located at
During the second place, metallic plate 20 is located at the top of line A.
Further, the side of metallic plate 20 close to the scintillator panel 30 is further opened with groove 21, in the groove 21
Tungsten silk screen is provided with, insulation board 70 is also folded between metallic plate 20 and scintillator panel 30, which is equipped with connection
In the opening of groove 21, secondary can also be reduced while tungsten silk screen stops line A for resistance.The material of insulation board 70 is
Good insulator, and the material of deformation is not easy, such as polytetrafluoroethylene (PTFE).
Further, plate bias voltage 80 is also folded between metallic plate 20 and insulation board 70, the plate bias voltage 80 is in the detector
Negative high voltage is connected to during work, to reduce secondary electron escape.The material of plate bias voltage 80 is aluminium alloy either copper or other are good
Conductor.
Further, the inner side of detecting window 113 is equipped with lens 90, which is used for the imaging model for adjusting CCD camera 40
Enclose.Certainly, lens 90 can also be processed as one with CCD camera 40, the camera as focus adjustable.
Further, which further includes driving mechanism 100, which is used to drive this turn
Axis 50 rotates.Driving mechanism 100 can be motor, and motor is used to drive shaft 50 to rotate, it is preferable that the motor is vacuum electric
Machine.
Further, the outside of detecting window 113 is equipped with fixing bracket 114, and CCD camera 40 is installed on the fixing bracket 114,
So installation is more firmly and conveniently.
Further, detection cavity 11 is additionally provided with LED light, for providing illumination.
Hatch is additionally provided with the side of the detection cavity 11, the hatch door 115 that the hatch is set for covering is additionally provided with the housing 10,
Sealing ring is folded between hatch door 115 and housing 10, which is equipped with motor vacuum adapter 1151 and signal converting head
1152, when in use, motor vacuum adapter 1151 can be used for powering for motor and signal transmission, and signal converting first 1152 can
With for power, flow strong signal to LED light transmission, be plate bias voltage 80 provide bias etc..
The side of the metallic plate 20 away from scintillator panel 30 is additionally provided with resistance device 110, and the both ends of resistance device 110 connect respectively
Metallic plate 20 and galvanometer 60 are connected to, when which is located at first position, the length direction of the resistance device 110 and the line
The direction of illumination of A is located along the same line.Resistance device 110, which can hinder, stops high energy particle, so as to collect electric charge.Resistance device 110
Material is tungsten, axial length 16mm, diameter 10mm, with support plate surface angle at 45 °.The effective length of resistance device 110 is 16mm, then is added
The thickness of upper tungsten filament and metallic plate 20, it is sufficient to which the resistance of all particles is parked in resistance device 110.
The selection of scintillator material：
Scintillator is the core of the present invention, and the selection of scintillator follows following basic principle：
1) line is measured with the mode of optical imagery, it is desirable to which the photoyield of scintillator is high, and light absorption factor is small；
2) visible wavelength is in 350nm-800nm, it is desirable to which the wavelength that scintillator shines is also in the range of this, to use
Conventional CCD is with regard to that can reach measurement purpose；
3) scintillator material flakiness easy to process, or particulate is polished into, it can be sprayed in metal profile；
4) cost is low, long lifespan.
Following table gives several typical scintillator parameters, and first is classified as scintillator type, including monocrystal, phosphor,
Ceramics and glass；Second is classified as the title or chemical formula of scintillator material, and Y3Al5O12 is the chemical formula of YAG crystal；3rd row
For density, unit g/cm3；4th, which is classified as incoming particle loss 1MeV energy, can produce the quantity of photon；5th is classified as light suction
The factor is received, i.e., can not escape out the photon share of material；6th is classified as maximum optical wavelength, in units of nm.
It can be modified by paying attention to mixing in the material, for example addition thallium (Tl) can increase in cesium iodide (CsI)
Photoyield and emission wavelength, are allowed to be more advantageous to measuring.
It is scintillator parameter list below：
It will be apparent to those skilled in the art that technical solution that can be as described above and design, make other various
Corresponding change and deformation, and all these changes and deformation should all belong to the protection domain of the claims in the present invention
Within.
Claims (10)
- A kind of 1. new beam detector, it is characterised in that including：Housing, the housing is interior to be equipped with a detection cavity, and the both sides of the detection cavity are respectively provided with the line incidence for line disengaging Mouth and line exit portal, the line entrance port and line exit portal are located along the same line, and the upper end of the detection cavity is equipped with detection Window；The metallic plate being articulated with by shaft on housing, the metallic plate between line entrance port and line exit portal, and The metallic plate can be moved stopping between the first position of line and the second place for avoiding line, which passes through galvanometer Ground connection；The scintillator panel of metallic plate side is fixedly arranged on, for being irradiated when metallic plate is located at first position by line；CCD camera, is installed on the outside of detecting window and is sent for detection by scintillator panel and pass through the light of detecting window.
- 2. new beam detector as claimed in claim 1, it is characterised in that the upper end of the detection cavity is equipped with two detections Window, two detecting windows are respectively arranged in the surface and oblique upper of detection cavity.
- 3. new beam detector as claimed in claim 1, it is characterised in that the upper end of metallic plate is articulated with shell by shaft On body, when which is located at first position, scintillator panel is located at metallic plate close to the side of line entrance port；The metallic plate During positioned at the second place, metallic plate is located at the top of the line, and scintillator panel is located at the top of metallic plate.
- 4. new beam detector as claimed in claim 1, it is characterised in that the lower end of metallic plate is articulated with shell by shaft On body, when which is located at first position, scintillator panel is located at metallic plate close to the side of line entrance port；The metallic plate During positioned at the second place, metallic plate is located at the lower section of the line, and scintillator panel is located at the top of metallic plate.
- 5. new beam detector as claimed in claim 1, it is characterised in that the metallic plate close to scintillator panel one Side is further opened with groove, and tungsten silk screen is provided with the groove, insulation board is also folded between metallic plate and scintillator panel, this is exhausted Listrium is equipped with the opening for being communicated in groove.
- 6. new beam detector as claimed in claim 5, it is characterised in that be also folded between metallic plate and insulation board partially Pressing plate, the plate bias voltage are connected to negative high voltage.
- 7. new beam detector as claimed in claim 1, it is characterised in that the inner side of detecting window is equipped with lens, the lens For adjusting the areas imaging of CCD camera.
- 8. new beam detector as claimed in claim 1, it is characterised in that the new beam detector further includes driving machine Structure, the driving mechanism are used to drive the shaft to rotate.
- 9. new beam detector as claimed in claim 1, it is characterised in that side of the metallic plate away from scintillator panel Resistance device is additionally provided with, the both ends of resistance device are connected to metallic plate and galvanometer, when which is located at first position, the resistance The direction of illumination of the length direction and the line that stop device is located along the same line.
- 10. new beam detector as claimed in claim 1, it is characterised in that hatch is additionally provided with the side of the detection cavity, The hatch door that the hatch is set for covering is additionally provided with the housing, sealing ring is folded between hatch door and housing, which is equipped with electricity Machine vacuum adapter and signal converting head.
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| CN201510542439.1A CN105068110B (en) | 2015-08-27 | 2015-08-27 | A kind of new beam detector |
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| CN201510542439.1A CN105068110B (en) | 2015-08-27 | 2015-08-27 | A kind of new beam detector |
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| CN105068110B true CN105068110B (en) | 2018-04-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3833433A4 (en) * | 2018-08-06 | 2022-05-04 | Integrated Sensors, LLC | Ionizing-radiation beam monitoring system |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106501840B (en) * | 2016-11-13 | 2023-04-11 | 中国科学院近代物理研究所 | Detector for measuring shape of longitudinal beam cluster of proton heavy ion beam |
| CN107589440B (en) * | 2017-09-21 | 2019-10-15 | 中国科学院上海应用物理研究所 | A kind of high-resolution automatic beam current detection device and method |
| CN111308541B (en) * | 2019-10-15 | 2022-06-28 | 北京烁科中科信电子装备有限公司 | Faraday cylinder device for measuring ion beam current |
| CN112904401A (en) * | 2021-01-22 | 2021-06-04 | 中国科学院近代物理研究所 | Ultra-thin beam profile detection system for particle therapy device |
| CN114034906B (en) * | 2021-11-09 | 2023-03-21 | 南京大学 | Alternating current transformer probe module for weak beam current signal measurement |
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| CN202134373U (en) * | 2011-07-13 | 2012-02-01 | 安徽戈瑞电子科技有限公司 | Beam current transformer |
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| CN204945388U (en) * | 2015-08-27 | 2016-01-06 | 广东恒聚医疗科技有限公司 | A kind of novel beam detector |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3414547B2 (en) * | 1995-04-26 | 2003-06-09 | 理化学研究所 | Synchrotron radiation position monitor and its position detection method |
| JP4550375B2 (en) * | 2003-05-30 | 2010-09-22 | 独立行政法人理化学研究所 | Beam ammeter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202134373U (en) * | 2011-07-13 | 2012-02-01 | 安徽戈瑞电子科技有限公司 | Beam current transformer |
| CN204009085U (en) * | 2014-07-15 | 2014-12-10 | 中广核工程有限公司 | A kind of nuclear power plant hydrogeneous waste gas radioactivity continuous monitoring device |
| CN204945388U (en) * | 2015-08-27 | 2016-01-06 | 广东恒聚医疗科技有限公司 | A kind of novel beam detector |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3833433A4 (en) * | 2018-08-06 | 2022-05-04 | Integrated Sensors, LLC | Ionizing-radiation beam monitoring system |
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