CN209390442U - Improve the extraction system of cyclotron educt beaming flow quality - Google Patents
Improve the extraction system of cyclotron educt beaming flow quality Download PDFInfo
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- CN209390442U CN209390442U CN201821446689.0U CN201821446689U CN209390442U CN 209390442 U CN209390442 U CN 209390442U CN 201821446689 U CN201821446689 U CN 201821446689U CN 209390442 U CN209390442 U CN 209390442U
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- cyclotron
- stripping film
- beaming flow
- educt beaming
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Abstract
The utility model relates to the line lead-out process of cyclotron, disclose the extraction system for improving cyclotron educt beaming flow quality, including at least a piece of stripping film, and the removing membrane support for loading stripping film, the stripping film is located in vacuum box, which is characterized in that the stripping film is connect with the stripping film holder pivots, and its rotational plane is parallel to the operation plane of line, the stripping film is by electric system driving rotation to control the angle between its relative beam direction of motion.The extraction system for the improvement cyclotron educt beaming flow quality that the utility model discloses, improves the quality of cyclotron educt beaming flow by adjusting the positional relationship between stripping film and line, adjusts the envelope of cyclotron educt beaming flow.
Description
Technical field
The utility model relates to the line lead-out process of cyclotron, more particularly to improve cyclotron educt beaming flow
The extraction system of quality.
Background technique
In current international community, medical accelerator has obtained significant progress and has been widely applied, wherein production diagnosis
It is cyclotron with the medical accelerator overwhelming majority for treating various radionuclides, existing hundreds convolution in the world
In accelerator, about 80% is used for medical treatment & health and life science, and Medical small-sized cyclotron is mainly used to produce11C、13N、15O、18F、64Cu、68Ge、111In、123The medical radionuclides such as I, and then produce the radiopharmaceutical such as FDG, this kind of acceleration
Device is usually compact cyclotron, is furnished with liquid target and solid target, some also add gas target after upgrading
Beam line, usually, the proton beam that this kind of accelerator is drawn are transported without too long beam line, but are directly beaten in liquid
With production on target18The ultra-short-lived radionuclide such as F or generation neutron etc..
The lead-out mode of cyclotron is varied, removing draw be wherein common one kind, with precession draw etc. its
His lead-out mode ratio, removing draw that mechanical structure is simple, low cost, ejection efficiency are high, are to accelerate H in the world at present-、D-Equal grains
The most common lead-out mode of cyclotron of son.
For the small-sized medical cyclotron of medical radioactive drug production, usually, in removing is drawn, removing
Film is always perpendicular to beam direction, still, for using removing lead-out mode compact cyclotron, under normal conditions its
Lead-out area is narrow, cannot place concentrating element, therefore is difficult to control the line envelope and beam loss of lead-out area, especially
The accelerator of outlet is directly placed at for production target, beam spot shape and size are also unable to get control on target.
Utility model content
In view of the deficienciess of the prior art, the utility model lies in that providing a kind of improvement cyclotron ejected beam family status
The extraction system of matter, the positional relationship being adjustable between stripping film and line, so as to improve cyclotron educt beaming flow
Quality adjusts the envelope of cyclotron educt beaming flow, controls beam spot shape and size on target, without introducing other components,
The mechanical structure of cyclotron extraction system is not influenced.
Improve the extraction system of cyclotron educt beaming flow quality, including at least a piece of stripping film, and for loading
The removing membrane support of stripping film, the stripping film are located in vacuum box, wherein the stripping film and the stripping film holder pivots
Connection, and its rotational plane is parallel to the operation plane of line, the stripping film is by electric system driving rotation to control it
Angle between the relative beam direction of motion.
H- ion provides centripetal after ion source system injection by the acceleration of radio frequency system and by field system
Power effect, moved in central plane with helical trajectory, when negative hydrogen ion pass through stripping film when, be stripped film stripping fall it is outermost
Two electronics of layer, become proton, that is, are transformed into cation, at this time under the influence of a magnetic field, running track will be to Xiang Fanfang
To deflection, to be brought out cyclotron.Above-mentioned technical proposal, by rotating stripping film, with change stripping film and line it
Between positional relationship, even if stripping film and perpendicular between the plane of the line direction of motion have certain angle, to make particle
An increment is generated, the increment of angle direction is indicated with formula (1):
Wherein, Δ θxIndicate that stripping film is relatively orthogonal to the grain that stripping film is passed through after the line direction of motion rotates by a certain angle
The increment in subangle direction, α indicate the angle of stripping film and the line direction of motion, BzFor vertical direction magnetic-field component, ρ is particle
Deflection radius, δ are the momentum spreads of particle, and n is magnetic field landing index.
After ignoring higher order term, then formula (1) can be indicated by formula (2):
That is, when stripping film and line normal direction (i.e. perpendicular to the line direction of motion) have certain angle, it can in the horizontal direction
Generate a poly-/blooming effect, inlet/outlet angle of the effect similar to deflection magnet.
Similarly, it can be derived by, for vertical direction, particle, which is passed through, has one with the plane perpendicular to the line direction of motion
The increment for determining its angle direction after the stripping film of angle can be indicated with formula (3):
After ignoring higher order term, Δ θZ=0.I.e. vertical direction angle is unchanged, therefore the angle of stripping film and line not shadow
The transmission matrix of vertical direction is rung, substantially it is believed that vertical direction envelope is unchanged.
Therefore, under the premise of ignoring higher order term, level is can be used with the angle perpendicular to the line direction of motion in stripping film
Direction line gather/defocuses, but for vertical direction then without influence, therefore, which can be used for adjusting cyclotron ejected beam
The envelope of stream controls beam spot shape and size on target, improves the cyclotron educt beaming flow drawn using removing lead-out mode
Quality.
In some embodiments, the stripping film is located on removing target, the removing target and the removing membrane support
Rotation connection.
By using above-mentioned technical proposal, stripping film is located on removing target, by removing the unitary rotation of target with reality
The rotation of existing stripping film.
In some embodiments, there are two the removing targets for rotation connection on the removing membrane support.
By using above-mentioned technical proposal, the angle of different stripping films can be set as needed, to obtain different beam spot shapes
Shape and size.
In some embodiments, the electric system passes through the rotation of removing target, the transmission described in transmission system drives
System include respectively with two driven gears for connecting of removing targets, and the driving gear to be engaged with the driven gear,
The electric system drives the driving gear rotation.
By using above-mentioned technical proposal, electric system passes through the transmission of transmission system as actuator to drive
Target rotation is removed, to realize stripping film and the adjusting perpendicular to angle between the plane of the line direction of motion.
In some embodiments, the electric system is located on the outside of the vacuum box, including motor, and is connected to described
First angular wheel of the output shaft of motor, coaxially connected one second angular wheel of driving gear, first conical tooth
Wheel is protruded into the vacuum box and is engaged with second angular wheel.
By using above-mentioned technical proposal, since axis and the motor output shaft position of driving gear are mutually perpendicular to,
Using the transmission of the realization power of bevel gear, so that driving gear be driven to rotate.
In some embodiments, the driving gear is connected with angular transducer, one control of angular transducer connection
Device processed, the electric system are connected to the controller.
Above-mentioned technical proposal is connect by using angular transducer with driving gear, monitors driving tooth by angular transducer
The rotation angle of wheel, and controller is fed back to, controller controls electric system according to the feedback information of angular transducer and works, from
And accurately adjust the rotation angle of stripping film.
In conclusion the utility model has the advantage that
1. by rotation stripping film, to change the positional relationship between stripping film and line, though stripping film with perpendicular to
There is certain angle, to make particle generate an increment, i.e., when stripping film and line method between the plane of the line direction of motion
To when having certain angle (i.e. perpendicular to the line direction of motion), under the premise of ignoring higher order term, stripping film with perpendicular to line
Horizontal direction can be used gather/to defocus for the angle of the direction of motion, but for vertical direction then without influence.Therefore, which can be used for
The envelope of cyclotron educt beaming flow is adjusted, beam spot shape and size on target are controlled, improves returning for removing lead-out mode extraction
Revolve the quality of accelerator educt beaming flow；
2. different stripping films can be set as needed by the way that there are two the removing targets for rotation connection on removing membrane support
Angle, to obtain different beam spot shape and size.
Detailed description of the invention
The extraction system for the improvement cyclotron educt beaming flow quality that Fig. 1 discloses for the utility model is installed on convolution and adds
Overall structure diagram after fast device；
Fig. 2 is the structural representation that target is removed in the extraction system shown in FIG. 1 for improving cyclotron educt beaming flow quality
Figure；
Fig. 3 is the enlarged drawing of part A in Fig. 1.
Appended drawing reference: 1, stripping film；2, membrane support is removed；201, clamping plate；21, target is removed；211, target stand body is removed；212,
Block；2121, bolt；3, vacuum box；4, electric system；401, connecting plate；41, motor；42, the first angular wheel；501, angle
Spend sensor；502, controller；510, connecting shaft；60, particle source system；70, field system；80, lower yoke.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing.
The extraction system for the improvement cyclotron educt beaming flow quality that the utility model discloses, as depicted in figs. 1 and 2,
It is installed at the vacuum box 3 of cyclotron, including removes membrane support 2, is installed on removing membrane support 2 and is located at vacuum box 3
Interior stripping film 1, and the electric system 4 that driving stripping film 1 is rotated relative to removing membrane support 2, wherein the rotation of stripping film 1
Plane is parallel to the operation plane of line.As shown in Figure 1, H- ion from be located at cyclotron center particle source system
After 60 project, acted on by the acceleration of radio frequency system (not shown) and by the centripetal force that field system 70 provides,
(i.e. 3 position of vacuum box) is in the central plane formed between upper magnet yoke (not shown) and lower yoke 80 with spiral shape rail
Mark movement is stripped film 1 and peels off outermost two electricity when negative hydrogen ion passes through the stripping film 1 being located in vacuum box 3
Son becomes proton, that is, is transformed into cation, at this time cation under the influence of a magnetic field, running track will to originally bore from
The opposite direction deflection of sub- traffic direction, to be brought out cyclotron.The improvement cyclotron that the utility model discloses
The extraction system of educt beaming flow quality, since stripping film 1 can drive rotation by electric system 4 to control its relative beam fortune
Angle between dynamic direction, therefore, the adjustable angle between stripping film 1 and line, thus adjustable cyclotron educt beaming flow
Envelope, control target on beam spot shape and size, improve removing lead-out mode draw cyclotron educt beaming flow quality.
Specifically, as shown in Fig. 2, removing membrane support 2 is fixed on 3 inside of vacuum box, the clamping plate being parallel to each other including two panels
201, two clamping plates 201 are parallel to the operation plane of line, and removing target 21 is clamped between two clamping plates 201, and removing target 21 passes through company
Spindle 510 and two clamping plates 201 are rotatablely connected, and connecting shaft 510 is directly in the operation plane of line, and connecting shaft 510 and removing target
It is located by connecting in 510 circumferential direction of connecting shaft between 21, and in 510 weeks companies of being rotated up of connecting shaft between connecting shaft 510 and two clamping plates 201
It connects.As shown in Figures 2 and 3, in this embodiment of the utility model, remove target 21 integral into horizontally-arranged " H " shape, and its with
" H " shape is projected into the vertical plane of line operation plane, the projection in line operation plane is rectangular, connecting shaft 510
Plane is run perpendicular to line and is located on the symmetry axis of " H " shape removing target 21, and stripping film 1 is located at " H " shape and removes 21 liang of target
Side indentation, there, and stripping film 1 is perpendicular to the operation plane of line.To by rotation removing target 21 to adjust stripping film 1 and beam
Angle between stream.
As shown in figure 3, removing target 21 includes the removing target stand body 211 and block 212 of mutual clamping, wherein removing target stand
Body 211 projects into " Z " font shape in line operation plane, and is formed after block 212 and removing 211 clamping of target stand body complete
Removing target 21, and make remove target stand body 211 line operation plane on projection it is rectangular.Stripping film 1 is located in removing target
Between 212 crack of pedestal 211 and block, thus by block 212 and the mutual clamping action for removing target stand body 211 to removing target 21
It is fixed, avoids damage stripping film 1, as shown in figure 3, block 212 is fixed and connected by bolt 2121 and removing target stand body 211
It connects.The angle of different stripping films 1 is set as needed for convenience, it is practical new at this to obtain different beam spot shape and size
In this embodiment of type, as shown in figure 3, by the rotation connection of connecting shaft 510, there are two removing targets 21 on removing membrane support 2, and
The plane that two connecting shafts 510 are formed is parallel to a wherein tangential direction for cyclotron.
As shown in Fig. 2, electric system 4 is fixed on 3 outside of vacuum box by connecting plate 401, as shown in figure 3, electric system 4
Including motor 41 and be connected to the first angular wheel 42 of 41 output shaft of motor, as shown in Figures 2 and 3, the utility model this
In embodiment, plane that the first angular wheel 42 is formed perpendicular to two connecting shafts 510.As shown in figure 3, electric system 4 passes through
Transmission system transmission is to drive removing target 21 to rotate, to adjust the angle of stripping film 1.
As shown in figure 3, transmission system include removed respectively with two the driven gear that connect of targets 21 and with two it is driven
The driving gear of gear engagement, two driven gears are coaxially connected with two connecting shafts 510 respectively, and are located at removing membrane support 2
Bottom is located by connecting in 510 axial direction of connecting shaft between driven gear and connecting shaft 510, and driving gear is coaxially connected with one
Two angular wheels, and the second angular wheel and driving gear are located by connecting in driving gear circumferential direction, the second angular wheel passes through
The underlying clamping plate 201 of membrane support 2 is removed, and is engaged with the first angular wheel 42 for being connected to 41 output shaft of motor, therefore,
Motor 41 drives the first angular wheel 42, thus the second angular wheel rotation that driving is engaged with the first angular wheel 42, then
Driving gear rotation is driven, the driven gear engaged therewith with driving gear is rotated with driving gear, to realize 1 angle of stripping film
Adjusting.
In order to accurately adjust the angle of removing target 21, as shown in Fig. 2, driving gear is connected with angular transducer 501, angle
Sensor 501 is located at outside vacuum box 3, in addition, be further fixed on a controller 502 on vacuum box 3, angular transducer 501 and
Motor 41 is all connected to controller 502.Angular transducer 501 is connect with driving gear, in driving gear rotary course in real time
The rotation angle of driving gear is monitored, and feeds data back to controller 502, controller 502 is anti-according to angular transducer 501
It presents data control motor 41 to run, i.e., sets the angle of removing target 21 first, controller 502 controls motor 41 and starts, with driving
Target 21 is removed to rotate to adjust the angle, during removing the rotation of target 21,501 real-time monitoring driving gear of angular transducer
Angle is rotated, and feeds data back to controller 502, when driving gear is rotated to predetermined angle, controller 502 controls motor
41 stop, with the rotation angle of this accurate adjustment removing target 21.
The outbound course of the extraction system of above-mentioned improvement cyclotron educt beaming flow quality are as follows: driven and shelled by motor 41
Off-target 21 rotates, so that stripping film 1 be made to generate angle with the plane perpendicular to the line direction of motion, wherein angular transducer 501
The rotation angle of real-time monitoring driving gear, and controller 502 is fed data back to, when driving gear is rotated to predetermined angle
When, controller 502, which controls motor 41, to be stopped, with the rotation angle of this accurate adjustment removing target 21.Particle pass through with perpendicular to beam
Compared with there is the plane of the stream direction of motion stripping film of certain angle to follow directly through the stripping film vertical with the line direction of motion
An increment is had, the increment of angle direction is indicated with formula (1):
Wherein, Δ θxIndicate that stripping film is relatively orthogonal to the grain that stripping film is passed through after the line direction of motion rotates by a certain angle
The increment in subangle direction, α indicate the angle of stripping film and the line direction of motion, BzFor vertical direction magnetic-field component, ρ is particle
Deflection radius, δ are the momentum spreads of particle, and n is magnetic field landing index.
After ignoring higher order term, then formula (1) can be indicated by formula (2):
That is, when stripping film and line normal direction (i.e. perpendicular to the line direction of motion) have certain angle, it can in the horizontal direction
Generate a poly-/blooming effect, inlet/outlet angle of the effect similar to deflection magnet.
Similarly, it can be derived by, for vertical direction, particle, which is passed through, has one with the plane perpendicular to the line direction of motion
The increment for determining its angle direction after the stripping film of angle can be indicated with formula (3):
After ignoring higher order term, Δ θZ=0.I.e. vertical direction angle is unchanged, therefore the angle of stripping film and line not shadow
The transmission matrix of vertical direction is rung, substantially it is believed that vertical direction envelope is unchanged.
Therefore, under the premise of ignoring higher order term, level is can be used with the angle perpendicular to the line direction of motion in stripping film
Direction gather/defocuses, but for vertical direction then without influence, therefore, which can be used for adjusting cyclotron educt beaming flow
Envelope controls beam spot shape and size on target, improves the quality for the cyclotron educt beaming flow that removing lead-out mode is drawn.
The above is only the preferred embodiment of the utility model, and the protection scope of the utility model is not limited merely to
Above-described embodiment, technical solution belonging to the idea of the present invention belong to the protection scope of the utility model.It should refer to
Out, for those skilled in the art, it is without departing from the principle of the utility model it is several improvement and
Retouching, these improvements and modifications also should be regarded as the protection scope of the utility model.
Claims (6)
1. improving the extraction system of cyclotron educt beaming flow quality, including at least a piece of stripping film (1), and for loading
The removing membrane support (2) of stripping film, the stripping film (1) are located in vacuum box (3), which is characterized in that the stripping film (1) with
Removing membrane support (2) rotation connection, and its rotational plane is parallel to the operation plane of line, the stripping film (1) passes through
Electric system (4) driving rotation is to control the angle between its relative beam direction of motion.
2. the extraction system according to claim 1 for improving cyclotron educt beaming flow quality, which is characterized in that described
Stripping film (1) is located in removing target (21), and the removing target (21) and the removing membrane support (2) are rotatablely connected.
3. the extraction system according to claim 2 for improving cyclotron educt beaming flow quality, which is characterized in that described
Removing rotation connection on membrane support (2), there are two the removing targets (21).
4. the extraction system according to claim 2 for improving cyclotron educt beaming flow quality, which is characterized in that described
For electric system (4) by removing target (21) rotation described in transmission system drives, the transmission system includes respectively and described in two
Remove the driven gear of target (21) connection, and the driving gear to engage with the driven gear, electric system (4) driving
The driving gear rotation.
5. the extraction system according to claim 4 for improving cyclotron educt beaming flow quality, which is characterized in that described
Electric system (4) is located on the outside of the vacuum box (3), including motor (41), and be connected to the output shaft of the motor (41)
First angular wheel (42), coaxially connected one second angular wheel of driving gear, first angular wheel (42) are protruded into
It is engaged in the vacuum box (3) with second angular wheel.
6. the extraction system according to claim 4 for improving cyclotron educt beaming flow quality, which is characterized in that described
Driving gear is connected with angular transducer (501), and the angular transducer (501) connects a controller (502), the department of electrical engineering
System (4) is connected to the controller (502).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821446689.0U CN209390442U (en) | 2018-09-04 | 2018-09-04 | Improve the extraction system of cyclotron educt beaming flow quality |
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| CN201821446689.0U CN209390442U (en) | 2018-09-04 | 2018-09-04 | Improve the extraction system of cyclotron educt beaming flow quality |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108966476A (en) * | 2018-09-04 | 2018-12-07 | 中国原子能科学研究院 | Improve the outbound course and extraction system of cyclotron educt beaming flow quality |
| CN110831313A (en) * | 2019-10-25 | 2020-02-21 | 中国原子能科学研究院 | Negative hydrogen beam splitting device of particle accelerator |
| CN110913561A (en) * | 2019-12-09 | 2020-03-24 | 中国原子能科学研究院 | Device and method for extracting single-ring beam of stripping extraction cyclotron |
| CN115551169A (en) * | 2022-11-28 | 2022-12-30 | 合肥中科离子医学技术装备有限公司 | Stripping and leading-out device of proton cyclotron |
-
2018
- 2018-09-04 CN CN201821446689.0U patent/CN209390442U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108966476A (en) * | 2018-09-04 | 2018-12-07 | 中国原子能科学研究院 | Improve the outbound course and extraction system of cyclotron educt beaming flow quality |
| CN110831313A (en) * | 2019-10-25 | 2020-02-21 | 中国原子能科学研究院 | Negative hydrogen beam splitting device of particle accelerator |
| CN110913561A (en) * | 2019-12-09 | 2020-03-24 | 中国原子能科学研究院 | Device and method for extracting single-ring beam of stripping extraction cyclotron |
| CN115551169A (en) * | 2022-11-28 | 2022-12-30 | 合肥中科离子医学技术装备有限公司 | Stripping and leading-out device of proton cyclotron |
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