CN211128369U - Adjustable beam slit device close to circular shape - Google Patents
Adjustable beam slit device close to circular shape Download PDFInfo
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- CN211128369U CN211128369U CN201921884395.0U CN201921884395U CN211128369U CN 211128369 U CN211128369 U CN 211128369U CN 201921884395 U CN201921884395 U CN 201921884395U CN 211128369 U CN211128369 U CN 211128369U
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Abstract
The utility model discloses a be close circular shape adjustable beam slit device, this beam slit device can be used to direct current beam cutting device, and install behind direct current beam cutting device's beam cutter polar plate, also can install in accelerator beam transmission system, adjustable beam slit device includes that two right angle opening size of slit head are the same, relative and the right angle dog of establishing, a drive mechanism that drives two right angle dogs of slit head simultaneously, and position detection feedback device, the drive mechanism of driving two right angle dogs of slit head simultaneously is controlled by slit end P L C controller, and whole device is integrated to the accelerator control system in through slit end P L C controller, the utility model discloses an in-process of beam pulsewidth continuous variation, the beam slit is close circular all the time to furthest has guaranteed the gathering effect of beam, and the beam that is dispersed when making the beam pass through the slit reaches the minimum, has improved the quality of strength and transmission.
Description
Technical Field
The utility model belongs to the cyclotron field, concretely relates to be close circular shape adjustable beam slit device.
Background
In a beam pulse system, a beam cutter is utilized to form a continuous direct current beam into a pulse beam with an ultra-short time structure and width, and the pulse beam based on the ultra-short time structure has very important application in the fields of nuclear data measurement, nuclear physical tests and other researches. The adjustable beam slit device is one of indispensable devices of a beam pulse system. Meanwhile, the beam slit device is widely applied to the aspects of beam current intensity and section control and adjustment in the field of accelerators, in particular to the precise beam current transmission process of proton treatment and certain specific experiments with strict requirements on beam current shape and current intensity.
In the prior art, a beam slit device applied to a beam cutter already exists, and as shown in fig. 1, a process that a beam enters from a left-side pole plate to a right-side beam slit device is a process that a pulse beam is generated: when passing through the left lower polar plate, the beam current is subjected to a transverse alternating electric field loaded on the polar plate, and is periodically deflected along the beam current transmission direction under the action of the alternating electric field, the beam selection slit device shown on the right side of the figure 1 is driven by two motors to generate pulse beam current by remotely controlling the opening size of the slit, and meanwhile, the pulse width of the obtained pulse beam current can be adjusted. The right diagram of fig. 1 is a beam current selecting device, a row of black dots on the right side is the direction of the beam current, the upper head stop block and the lower head stop block are two square plates, the beam current penetrates through a gap between the upper square plate and the lower square plate, and the motors drive the square plates to move in the opposite direction or in the opposite direction, so that the width of the pulse beam current is changed.
The problems of the beam selecting device on the right side of the figure 1 are as follows: the gap between the two square plates is strip-shaped, and the good beam quality requires that the beam sectional area is circular, so that the beam loss caused by hitting the accelerator as little as possible when the particle beam enters the accelerator for acceleration can be ensured, and the working efficiency of the accelerator is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to prior art not enough, provide one kind and be close circular shape adjustable beam slit device, beam cluster is dispersed, the particle gets into the problem of beam current loss behind the accelerator when the beam cluster makes the pulse beam pass through the slit when aim at solves prior art optional beam device's rectangular form beam slit.
The utility model discloses a solve its technical problem and adopt following technical scheme:
a nearly circular adjustable beam slit device can be used for a direct current beam cutting device and is arranged behind a beam cutter pole plate of the direct current beam cutting device and can also be arranged in an accelerator beam transmission system, and is characterized in that the adjustable beam slit device comprises two opposite right-angle stop blocks with the same size of a right-angle opening of a slit head, a driving mechanism for simultaneously driving the two right-angle stop blocks of the slit head, and a position detection feedback device, wherein the driving mechanism for simultaneously driving the two right-angle stop blocks of the slit head is controlled by a slit end P L C controller, the whole adjustable beam slit device is integrated into an accelerator control system through the slit end P L C controller, and then is remotely controlled by a master control P L C of an accelerator.
The two right-angle stoppers of the slit head are arranged in a manner of being attached to each other front and back, the two right-angle stoppers are identical in shape and are both in a right-angle opening shape, and the opening parts are oppositely arranged to form a square opening to be close to a circle; under the action of an alternating electric field of a beam cutting polar plate, deflection at the beam generating position is realized, only particle beams with small deflection angles can pass through the openings of the two slit right-angle stop blocks, so that the conversion from direct current beams to pulse beams is realized, and the final pulse width of the pulse beams and the total number of particles passing through the slit head are realized by adjusting the sizes of the openings of the two right-angle stop blocks at the slit head; the adjustable beam slit device enables a beam to have a better focusing effect when the beam passes through the slit head and approaches the round opening, and the adjustable beam slit device can dynamically change or adjust the size of the opening of the slit head which approaches the round opening.
The driving mechanism and the position detection feedback device comprise a stepping motor with an electromagnetic brake, a motor driver, a set of transmission device and a potentiometer for position feedback, wherein the transmission device comprises a bidirectional lead screw and two stroke limit protection switches, the bidirectional lead screw is used for driving two right-angle blocks of the slit head to move oppositely, the stepping motor drives the two right-angle blocks of the slit head to move synchronously through the transmission device and limits the movement range of the two right-angle blocks of the slit head through the stroke limit protection switches, and the position detection feedback device is used for feeding slit head position information back to a slit end P L C control system to perform closed-loop control on the slit position.
The position detection feedback device adopts a linear potentiometer to feed back position information of a slit head, the positioning precision of the adjustable beam slit device is within 0.1mm, the maximum size of a square opening of the slit head is 30 × 30mm, the slit head can be completely closed when the slit head is narrowest, two right-angle stop blocks of the slit head are closely mounted in front and at back, the gap is required to be as small as possible, the two right-angle stop blocks are closely attached to each other as possible and have no friction, the maximum gap is required to be not more than 1mm, the right-angle stop block of the slit head is made of T2 red copper, other parts have no special requirements, and the sealing position can be sealed by rubber, and can be sealed by a fluororubber.
The utility model has the advantages of effect
1. The utility model discloses an adopt 90 openings of two slit right angle dogs to install in opposite directions, and hug closely the installation around, and the maximum clearance requirement can not exceed 1mm around, drive two-way lead screw through the motor, two-way lead screw drive two slit right angle dogs move in opposite directions, the kinematic position through two slit right angle dogs of travel switch restriction makes the opening size of two slit right angle dogs the biggest set up to 30 × 30mm, narrowest can close completely, the in-process of beam pulsewidth continuous variation has been realized, the beam slit is close circularly all the time, thereby furthest has guaranteed the gathering effect of beam, make the beam that is dispersed when the beam passes through the slit reach the minimum, the beam quality of beam strength and transmission has been improved.
2. The utility model provides a technical problem that the field has since a long time since, the beam slit never all be the line shape promptly, cause the most beam current to be intercepted the extravagant difficult problem by the dog on its own circular cross section when the beam current passes through the slit. The utility model breaks through the habitual thinking of people, namely, people are used to the fact that the width and the width of beam slits are distributed on a plane in two motion directions, so that only one linear slit is arranged for a long time; the utility model discloses constitute an approximate plane, adopt two opening right angle shapes to constitute one with the most approximate figure of circular with two plane combinations of three-dimensional space to solved the technical problem that the circular beam slit can't be realized for a long time in this field, obtained unexpected effect, produced from the leap of quantitative change to qualitative change.
3. The utility model discloses combine two-way lead screw and motor ingeniously, realize that two right angle dogs that a motor drove the slit head do synchronous motion, compare prior art and adopt two motors to drive the method of a dog motion respectively, not only saved a motor, also save the motor driver supporting with this motor, mechanical transmission, still saved two motor synchronous motion's of control mechanism, finally, the whole volume of with line slit device has reduced nearly two-thirds, effectively simplified installation and maintenance, the effect that can not expect has been gained.
Drawings
FIG. 1 is a schematic view of a prior art beam cutting apparatus;
fig. 2 is a schematic view of the application effect of the beam slit device of the present invention;
FIG. 2a is an enlarged view of area A of FIG. 2;
FIG. 2b is an enlarged view of a portion of FIG. 2;
in the figure, 1: a feed-in port; 2: a coupling ring 2; 3: a solenoid coil; 4: a shielding housing; 5: a coaxial feed tube; 6: a vacuum electrode; 7. 8: cutting the polar plate; 9: cutting the polar plate shell; 10: a capacitance trimming plate; 11: a beam slit device can be adjusted; 11-1: a bidirectional lead screw; 11-2: a right-angle block; 11-3: a motor; 11-4: a motor driver; 11-5: a potentiometer; 11-6-1: a travel limit protection switch; 11-6-2: a travel limit protection switch; 11-7: and a circular hole cover plate.
Detailed Description
The design principle of the utility model
1. The design difficulty of the circular beam slit. The beam slit is designed to be circular, but the beam selection device not only allows the beam to pass, but also needs to dynamically change the size of the beam gap to generate pulse widths with different widths, if the beam selection device is designed to be a round hole slit, when the pulse width needs to be enlarged, the round hole slit is a red copper component, and the red copper component does not have elasticity and cannot stretch, the original red copper round hole slit needs to be divided into a plurality of parts along the circumference and then distributed on the enlarged circumference, and the original radian is not suitable for a new radian, and the shape of the enlarged beam slit does not keep the circular shape any more. The circular beam slit is difficult to realize, so that in the prior art, two cuboid copper plates are used as baffles, a slit between the cuboid copper plates is used as a beam selection slit, and the cuboid copper plates are used as the beam baffles, so that the circular beam slit is generally adopted due to the fact that the manufacturing is easy and the process is simple. However, the strip beam slits formed by the cuboid copper plate baffle plate enable the beam cross section passing through the slits to be relatively divergent, so that the beam is lost too much when entering the accelerator for acceleration, and the efficiency of the accelerator is reduced.
2. Compared with other shapes, the square beam slit is closest to a circle, only a square slit pore passage which is closest to the circle can be kept after the slit gap is expanded, the square pore passage is formed by butt joint of two opposite right-angle baffles with right-angle shapes, a bidirectional lead screw is adopted to be respectively connected with the two right-angle baffles, when the square hole needs to be reduced, the two right-angle baffles are driven by the bidirectional lead screw to face and stagger, when the square hole needs to be expanded, the bidirectional lead screw drives the two right-angle baffles to move along the back channel until the opening size reaches 30 × 30mm, the process is controlled by stroke switches 11-6-1 and 11-6-2, and therefore, the square slit always keeps the square shape no matter the square hole is expanded or reduced, namely, the shape which is closest to the circle is always kept.
Based on the above utility model principle, the utility model discloses a be close circular shape adjustable beam slit device.
A nearly circular adjustable beam slit device is shown in figure 2 and can be used for a direct current beam cutting device and is arranged behind a beam cutter pole plate of the direct current beam cutting device, and the device is characterized in that as shown in figures 2a and 2b, the adjustable beam slit device comprises two opposite right-angle stoppers 11-2 with the same size of right-angle openings of a slit head, a driving mechanism for simultaneously driving the two right-angle stoppers of the slit head, and a position detection feedback device, wherein the driving mechanism for simultaneously driving the two right-angle stoppers of the slit head is controlled by a slit end P L C controller, and the whole adjustable beam slit device is integrated into an accelerator control system through the slit end P L C controller and is controlled by a master control P L C of an accelerator.
As shown in fig. 2, 2a and 2b, two right-angle stoppers 11-2 at the head part of the slit are arranged in a manner of being attached to each other front and back, the two right-angle stoppers 11-2 are identical in shape and are both in a right-angle opening shape, and the opening parts are arranged oppositely to form a square opening to be close to a circle; under the action of an alternating electric field of a beam cutting polar plate, deflection at the beam generating position is realized, only particle beams with small deflection angles can pass through the openings of the two slit right-angle stop blocks, so that the conversion from direct current beams to pulse beams is realized, and the final pulse width of the pulse beams and the total number of particles passing through the slit head are realized by adjusting the sizes of the openings of the two right-angle stop blocks at the slit head; the adjustable beam slit device enables a beam to have a better focusing effect when the beam passes through the slit head and approaches the round opening, and the adjustable beam slit device can dynamically change or adjust the size of the opening of the slit head which approaches the round opening.
As shown in FIG. 2a, the driving mechanism and the position detection feedback device comprise a stepping motor 11-3 with an electromagnetic brake, a motor driver 11-4, a set of transmission device and a potentiometer 11-5 used for position feedback, wherein the transmission device comprises a bidirectional lead screw 11-1, the bidirectional lead screw 11-1 is used for driving two right-angle blocks 11-2 of the slit head to move oppositely or reversely, the transmission device also comprises two stroke limit protection switches (11-6-1, 11-6-2), the stepping motor 11-3 drives the two right-angle blocks 11-2 of the slit head to move synchronously through the transmission device, and limits the moving range of the two right-angle blocks of the slit head through the stroke limit protection switches (11-6-1, 11-6-2), and the position detection feedback device is used for feeding slit head position information back to a slit end P L C control system for closed-loop control of the slit position.
The position detection feedback device adopts a linear potentiometer to feed back position information of a slit head, the positioning precision of the adjustable beam slit device is within 0.1mm, the maximum size of a square opening of the slit head is 30 × 30mm, the slit head can be completely closed when the slit head is narrowest, two right-angle stop blocks of the slit head are closely mounted in front and at back, the gap is required to be as small as possible, the two right-angle stop blocks are closely attached to each other as possible and have no friction, the maximum gap is required to be not more than 1mm, the right-angle stop block of the slit head is made of T2 red copper, other parts have no special requirements, and the sealing position can be sealed by rubber, and can be sealed by a fluororubber.
The direct current beam cutting device is shown in fig. 2, and comprises a spiral resonator, a beam cutting polar plate device and a beam selecting slit system; the spiral resonator is used for providing high-frequency voltage for the beam cutting polar plate, the beam cutting polar plate device is used for providing an alternating electric field for beam passing and beam deflection, and the beam selection slit device is used for cutting the beam in cooperation with the cutting polar plate so as to generate pulse beam with corresponding pulse width; the resonator is a small resonator, and the small resonator is a capacitance trimming polar plate with the fixed natural frequency of the spiral resonator accurately; the beam of the beam selection slit system passes through the approximate circular cross section which can enable the beam focusing effect to be better and can dynamically change the shape and the size.
The utility model discloses a be close circular shape adjustable beam slit device of application not only can use in forming the system of pulse beam with direct current beam, also can use regulation and control of the beam current intensity and the beam cross-section of the relevant beam current transmission process of accelerator, can also use in the automatically regulated process to the beam current in the experimentation.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (4)
1. A nearly circular adjustable beam slit device can be used for a direct current beam cutting device and is arranged behind a beam cutter pole plate of the direct current beam cutting device and can also be arranged in an accelerator beam transmission system, and is characterized in that the adjustable beam slit device comprises two opposite right-angle stop blocks with the same size of a right-angle opening of a slit head, a driving mechanism for simultaneously driving the two right-angle stop blocks of the slit head, and a position detection feedback device, wherein the driving mechanism for simultaneously driving the two right-angle stop blocks of the slit head is controlled by a slit end P L C controller, the whole adjustable beam slit device is integrated into an accelerator control system through the slit end P L C controller, and then is remotely controlled by a master control P L C of an accelerator.
2. The adjustable near circular beam slit apparatus of claim 1, wherein: the two right-angle stoppers of the slit head are arranged in a manner of being attached to each other front and back, the two right-angle stoppers are identical in shape and are both in a right-angle opening shape, and the opening parts are oppositely arranged to form a square opening to be close to a circle; under the action of an alternating electric field of a beam cutting polar plate, deflection at the beam generating position is realized, only particle beams with small deflection angles can pass through the openings of the two slit right-angle stop blocks, so that the conversion from direct current beams to pulse beams is realized, and the final pulse width of the pulse beams and the total number of particles passing through the slit head are realized by adjusting the sizes of the openings of the two right-angle stop blocks at the slit head; the adjustable beam slit device enables a beam to have a better focusing effect when the beam passes through the slit head and approaches the round opening, and the adjustable beam slit device can dynamically change or adjust the size of the opening of the slit head which approaches the round opening.
3. The adjustable beam slit device with the approximate circular shape according to claim 1, wherein the driving mechanism and the position detection feedback device comprise a stepping motor with electromagnetic brake, a motor driver, a set of transmission device and a potentiometer for position feedback, the transmission device comprises a bidirectional lead screw for driving two right-angle blocks of the slit head to move oppositely and further comprises two stroke limit protection switches, the stepping motor drives the two right-angle blocks of the slit head to move synchronously through the transmission device and limits the movement range of the two right-angle blocks of the slit head through the stroke limit protection switches, and the position detection feedback device is used for feeding back slit head position information to a slit end P L C control system for closed-loop control of the slit position.
4. The adjustable beam slit device with the shape close to a circle as claimed in claim 1, wherein the position detection feedback device uses a linear potentiometer to feed back the position information of the slit head, the positioning accuracy of the adjustable beam slit device is within 0.1mm, the maximum size of a square opening of the slit head is 30 × 30mm, the slit head can be completely closed at the narrowest point, two right-angle stoppers of the slit head are closely mounted in front and at the back, the gap is required to be as small as possible, the two right-angle stoppers are closely attached to each other as possible without friction, the maximum gap is required to be not more than 1mm, the right-angle stopper of the slit head is made of T2 red copper, other parts have no special requirements, and the sealing position is sealed by a fluororubber sealing ring or metal sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921884395.0U CN211128369U (en) | 2019-11-02 | 2019-11-02 | Adjustable beam slit device close to circular shape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921884395.0U CN211128369U (en) | 2019-11-02 | 2019-11-02 | Adjustable beam slit device close to circular shape |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211128369U true CN211128369U (en) | 2020-07-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921884395.0U Active CN211128369U (en) | 2019-11-02 | 2019-11-02 | Adjustable beam slit device close to circular shape |
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| Country | Link |
|---|---|
| CN (1) | CN211128369U (en) |
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2019
- 2019-11-02 CN CN201921884395.0U patent/CN211128369U/en active Active
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