CN109579667B - Device and method for measuring polar distance of charged particle deflection plate of cyclotron - Google Patents
Device and method for measuring polar distance of charged particle deflection plate of cyclotron Download PDFInfo
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- CN109579667B CN109579667B CN201910068728.0A CN201910068728A CN109579667B CN 109579667 B CN109579667 B CN 109579667B CN 201910068728 A CN201910068728 A CN 201910068728A CN 109579667 B CN109579667 B CN 109579667B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/14—Measuring arrangements characterised by the use of mechanical techniques for measuring distance or clearance between spaced objects or spaced apertures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
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Abstract
The invention discloses a device and a method for measuring the polar distance between charged particle deflection plates of a cyclotron. The invention has the beneficial effects that: the invention can accurately measure the distance between the high-voltage electrode of the deflection plate and the beam current cutting diaphragm, is convenient for accurately calculating the actual electric field intensity of the deflected beam current, and simultaneously adopts the aluminum alloy material, thereby reducing the weight of the measuring device, reducing the processing difficulty and reducing the manufacturing cost. The invention has the advantages of convenient operation, firmness, durability, good social benefit and suitability for popularization and use.
Description
Technical Field
The invention relates to a measuring device for the interpolar distance of a deflection plate, in particular to a measuring device and a measuring method for the interpolar distance of a charged particle deflection plate of a cyclotron, and belongs to the technical field of application of the measuring device for the interpolar distance of the deflection plate.
Background
With the increasing demand for cancer therapy, proton therapy has become an effective treatment for tumors. Due to the energy distribution characteristic of the Bragg peak of the proton in the substance, the focus can be effectively killed and the damage to the surrounding healthy tissues can be reduced by controlling the position of the proton Bragg peak. Compared with a normal-temperature cyclotron, the superconducting proton cyclotron has the advantages of compact structure and low running power loss. Among these, the deflection plates of the extraction zone are one of the key components of such accelerator extraction zones. The principle of beam deflection of the beam lead-out area is that an electric field generated by a deflection plate exerts an outward acting force on a beam to enable the beam to be separated from an acceleration area and enter a fringe field area, and the fringe field rapidly drops to cause the beam to be deflected into a lead-out magnetic channel.
The key parameter of the deflection plate is the electric field intensity of an electrostatic field, the voltage of a high-voltage electrode can be obtained through reading of a high-voltage power supply, the electric field intensity is obtained according to an electric field intensity calculation formula, and the distance parameter of the deflection plate also needs to be obtained when the electric field intensity is obtained.
Disclosure of Invention
The invention aims to solve the problem that the reading precision of the polar gap of a deflection plate measured by a wedge-shaped feeler gauge is too low at present, and provides a device and a method for measuring the polar gap of a charged particle deflection plate of a cyclotron.
The purpose of the invention can be realized by the following technical scheme: a polar distance measuring device for a charged particle deflection plate of a cyclotron comprises an assembly gap gauge, a measuring tool bottom plate, a measuring tool flat plate, an adjusting bolt, a level bubble, a dial indicator clamping part and a dial indicator, the dial indicator clamping part, the dial indicator and the leveling bubble are all fixed on the measuring tool flat plate, the assembly gap gauge is assembled between the high-voltage electrode and the beam cutting film and is used as an initial assembly gap reference, a measurement tool bottom plate is arranged below the measurement tool flat plate in parallel, and one end of the middle part of the measurement tool flat plate is vertically penetrated with an adjusting bolt, a sinking platform is arranged on the measurement tool flat plate, the fixture is used for positioning a dial indicator clamping part, the depth of the sinking platform is 2-4mm, the dial indicator clamping part is arranged in the sinking platform, and the dial indicator is fixed and clamped with the measurement tool flat plate through a screw.
The invention has further technical improvements that: the dial indicator is fixed at one end of the measuring tool flat plate, the dial indicator clamping part is arranged at the joint of the dial indicator and the measuring tool flat plate, level bubbles are arranged above two ends of the measuring tool flat plate, the two level bubbles are placed on the measuring tool flat plate in a reference mode, and the measuring tool flat plate is adjusted to a horizontal position.
The invention has further technical improvements that: the measuring tool bottom plate is connected with the lower mounting plate of the deflection plate through a screw, and the measuring tool flat plate is fixed with the measuring tool bottom plate through an adjusting bolt and is arranged on an outer fixing plate at the lower part of the deflection plate.
The invention has further technical improvements that: the outer contour of the flat plate of the measuring tool is arc-shaped, the radius of the flat plate of the measuring tool is the same as the radius of the outer surface of the beam cutting film, and the beam cutting film of the measured deflection plate can be detached through the clamping groove.
The invention has further technical improvements that: the dial gauge is fixed on the measuring tool flat plate through the screw and the dial gauge clamping part, the dial gauge clamping part is installed in the sinking table on the upper surface of the measuring tool flat plate, the dial gauge is fixed through the screw and clamped, and in order to ensure the coaxiality of the axle center of the dial gauge and the through hole of the dial gauge clamping part, the diameter of the through hole of the dial gauge clamping part is 0.3-0.6mm larger than that of the fixed rod of the dial gauge.
The invention has further technical improvements that: the extended line of the axle center of the through hole of the dial indicator clamping part is intersected with the circle center of the deflection plate, the axle centers are distributed symmetrically at equal angles, and the distance between every two parts is 9 degrees, 18 degrees and 9 degrees respectively.
A method for measuring the polar distance of a charged particle deflection plate of a cyclotron specifically comprises the following steps:
the method comprises the following steps: after the assembly of the deflection plate device is completed, a measured object is installed on a fixed base, a measuring tool installation flat plate is fixed with a deflection plate lower installation plate through screws, the measuring tool flat plate is connected and fixed with the measuring tool installation flat plate through adjusting bolts and is abutted against an outer fixed plate at the lower part of the deflection plate to tightly press a beam cutting film, and the measuring tool flat plate is adjusted to a horizontal position by referring to two level bubbles placed on the measuring tool flat plate;
step two: the dial gauge is installed in the sinking table on the upper surface of the measurement tool flat plate through a dial gauge clamping part and is fixed through a screw, a measuring rod probe of the dial gauge is close to the high-voltage electrode, the dial gauge reads-mm, the dial gauge is clamped, the dial gauge value A is recorded, a beam cutting film is installed, and the dial gauge value B is recorded;
step three: after the dial indicator reading A, B is obtained, the distance between the points is obtained by using the formula C-B-A, a plurality of sinking platforms are arranged on the measuring tool flat plate, and the distance between 4 points of C1, C2, C3 and C4 can be obtained at one time.
Compared with the prior art, the invention has the beneficial effects that: the invention can accurately measure the distance between the high-voltage electrode of the deflection plate and the beam current cutting diaphragm, is convenient for accurately calculating the actual electric field intensity of the deflected beam current, and simultaneously adopts the aluminum alloy material, thereby reducing the weight of the measuring device, reducing the processing difficulty and reducing the manufacturing cost. The invention has the advantages of convenient operation, firmness, durability, good social benefit and suitability for popularization and use.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a cyclotron charged particle deflector plate pole distance measuring device of the present invention assembled on a deflector plate.
In the figure: 1. assembling a clearance gauge; 2. measuring a tool bottom plate; 3. measuring a tool flat plate; 4. adjusting the bolt; 5. a level bubble; 6. clamping the part by the dial indicator; 7. a dial indicator; 8. a deflection plate lower mounting plate; 9. cutting the film by beam current; 10. and a high voltage electrode.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a polar distance measuring device for a charged particle deflector of a cyclotron comprises an assembly gap gauge 1, a measuring tool bottom plate 2, a measuring tool flat plate 3, an adjusting bolt 4, a level bubble 5, a dial indicator clamping part 6 and a dial indicator 7, wherein the dial indicator clamping part 6, the dial indicator 7 and the level bubble 5 are all fixed on the measuring tool flat plate 3, the assembly gap gauge 1 is assembled between a high-voltage electrode 10 and a beam cutting film 9, the assembly gap gauge 1 is assembled between the high-voltage electrode 10 and the beam cutting film 9 and used as an initial assembly gap reference, after the assembly of the deflector is completed, the assembly gap gauge 1 is assembled at two ends of the high-voltage electrode and the beam cutting film and used as the assembly gap reference and adjusts the front and rear positions of the high-voltage electrode to abut against the assembly gap gauge 1, the measuring tool bottom plate 2 is arranged below the measuring tool flat plate 3 in, and one end of the middle part of the measurement tool flat plate 3 is vertically provided with an adjusting bolt 4 in a penetrating mode, a sinking platform is arranged on the measurement tool flat plate 3 and used for positioning a dial indicator clamping part 6, the depth of the sinking platform is 2-4mm, the dial indicator clamping part 6 is installed in the sinking platform and fixed with the measurement tool flat plate 3 through a screw and clamps a dial indicator 7.
As a preferred embodiment of the invention, the dial indicator 7 is fixed at one end of the measurement tool flat plate 3, the dial indicator clamping part 6 is arranged at the joint of the dial indicator 7 and the measurement tool flat plate 3, the level bubbles 5 are arranged above two ends of the measurement tool flat plate 3, the measurement tool flat plate 3 is adjusted to a horizontal position by referring to the two level bubbles 5 arranged on the measurement tool flat plate 3, and the beam cutting film 9 is detached through the clamping groove after the installation is completed.
As a preferred embodiment of the invention, the measuring tool bottom plate 2 is connected with the lower mounting plate 8 of the deflection plate through screws, and the measuring tool flat plate 3 is fixed with the measuring tool bottom plate 2 through an adjusting bolt 4 and is lapped on an outer fixing plate at the lower part of the deflection plate.
As a better embodiment of the invention, the outer contour of the measuring tool flat plate 3 is arc-shaped, the radius of the measuring tool flat plate 3 is the same as the radius of the outer surface of the beam cutting film 9, and the beam cutting film 9 of the measured deflection plate can be detached through the clamping groove.
As a preferred embodiment of the invention, the dial indicator 7 is fixed on the measuring tool flat plate 3 through a screw and a dial indicator clamping part 6, the dial indicator clamping part 6 is arranged in a sunken table on the upper surface of the measuring tool flat plate 3 and is fixed through the screw, the clamped dial indicator 7 is clamped, and in order to ensure the coaxiality of the axle center of the dial indicator 7 and the through hole of the dial indicator clamping part 6, the diameter of the through hole of the dial indicator clamping part 6 is 0.3-0.6mm larger than that of the dial indicator fixing rod.
As a preferred embodiment of the invention, the extension line of the axle center of the through hole of the dial indicator clamping part 6 is intersected with the circle center of the deflection plate, the axle centers are distributed in an equiangular symmetry mode, and the distance between every two parts is 9 degrees, 18 degrees and 9 degrees respectively.
A method for measuring the polar distance of a charged particle deflection plate of a cyclotron specifically comprises the following steps:
the method comprises the following steps: after the assembly of the deflection plate device is completed, a measured object is installed on a fixed base, a measuring tool installation flat plate 2 is fixed with a deflection plate lower installation plate 8 through screws, a measuring tool flat plate 3 is connected and fixed with the measuring tool installation flat plate 2 through adjusting bolts, is abutted against an outer fixed plate at the lower part of the deflection plate, abuts against a beam cutting film 9, and is adjusted to a horizontal position by referring to two level bubbles 5 placed on the measuring tool flat plate 3;
step two: the dial indicator 7 is arranged in a sink table on the upper surface of the measurement tool flat plate 3 through a dial indicator clamping part 6 and is fixed through a screw, a probe of a measuring rod of the dial indicator approaches to the high-voltage electrode 10, the reading of the dial indicator 7 is 2-5mm, the dial indicator 7 is clamped, the numerical value A of the dial indicator is recorded, the beam cutting film 9 is installed, and the numerical value B of the dial indicator is recorded;
step three: after the dial indicator reading A, B is obtained, the distance between the points is obtained by using the formula C-B-A, a plurality of sinking platforms are arranged on the measuring tool flat plate 3, and the distance between 4 points of C1, C2, C3 and C4 can be obtained at one time.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (2)
1. A polar distance measuring device for a charged particle deflection plate of a cyclotron is characterized in that: the beam current measuring device comprises an assembly gap gauge (1), a measuring tool bottom plate (2), a measuring tool flat plate (3), an adjusting bolt (4), a level bubble (5), a dial indicator clamping part (6) and a dial indicator (7), wherein the dial indicator clamping part (6), the dial indicator (7) and the level bubble (5) are all fixed on the measuring tool flat plate (3), and the assembly gap gauge (1) is assembled between a high-voltage electrode (10) and a beam current cutting film (9);
a measuring tool bottom plate (2) is arranged below the measuring tool flat plate (3) in parallel, and an adjusting bolt (4) vertically penetrates through one end of the middle of the measuring tool flat plate (3);
the dial indicator (7) is fixed at one end of the measuring tool flat plate (3), the dial indicator clamping part (6) is arranged at the joint of the dial indicator (7) and the measuring tool flat plate (3), and level bubbles (5) are arranged above two ends of the measuring tool flat plate (3);
the measuring tool bottom plate (2) is connected with the deflection plate lower mounting plate (8) through a screw, and the measuring tool flat plate (3) is fixed with the measuring tool bottom plate (2) through an adjusting bolt (4) and is lapped on an outer fixing plate at the lower part of the deflection plate;
the outer contour of the measuring tool flat plate (3) is arc-shaped, and the radius of the measuring tool flat plate (3) is the same as the radius of the outer surface of the beam cutting film (9);
the dial indicator (7) is fixed on the measuring tool flat plate (3) through a screw and a dial indicator clamping part (6), the dial indicator clamping part (6) is arranged in a sunken table on the upper surface of the measuring tool flat plate (3), and the dial indicator (7) is fixed through the screw and clamped;
the extension line of the axle center of the through hole of the dial indicator clamping part (6) is intersected with the circle center of the deflection plate, and the axle centers are distributed in an equiangular symmetry manner;
the measuring method of the device for measuring the polar distance between the charged particle deflection plates of the cyclotron specifically comprises the following steps:
the method comprises the following steps: after the assembly of the deflection plate device is completed, a measured object is installed on a fixed base, a measuring tool bottom plate (2) is fixed with a deflection plate lower installation plate (8) through screws, a measuring tool flat plate (3) is connected and fixed with the measuring tool installation flat plate (2) through an adjusting bolt, is abutted against an outer fixed plate at the lower part of the deflection plate, abuts against a beam cutting film (9), and is adjusted to a horizontal position by referring to two level bubbles (5) placed on the measuring tool flat plate (3);
step two: the dial indicator (7) is arranged in a sink table on the upper surface of the measurement tool flat plate (3) through a dial indicator clamping part (6) and is fixed through a screw, a probe of a measuring rod of the dial indicator is close to the high-voltage electrode (10), the dial indicator (7) reads for 2-5mm, the dial indicator (7) is clamped, the numerical value A of the dial indicator is recorded, a beam cutting film (9) is arranged, and the numerical value B of the dial indicator is recorded;
step three: after the dial indicator reading A, B is obtained, the distance between the points is obtained by using the formula C = B-A, a plurality of sinking platforms are arranged on the measuring tool flat plate (3), and the distance between 4 points of C1, C2, C3 and C4 can be obtained at one time.
2. A method of measuring a device for measuring the interpolar distance between plates of a charged particle deflection of a cyclotron as claimed in claim 1, the method comprising in particular the steps of:
the method comprises the following steps: after the assembly of the deflection plate device is completed, a measured object is installed on a fixed base, a measuring tool bottom plate (2) is fixed with a deflection plate lower installation plate (8) through screws, a measuring tool flat plate (3) is connected and fixed with the measuring tool installation flat plate (2) through an adjusting bolt, is abutted against an outer fixed plate at the lower part of the deflection plate, abuts against a beam cutting film (9), and is adjusted to a horizontal position by referring to two level bubbles (5) placed on the measuring tool flat plate (3);
step two: the dial indicator (7) is arranged in a sink table on the upper surface of the measurement tool flat plate (3) through a dial indicator clamping part (6) and is fixed through a screw, a probe of a measuring rod of the dial indicator is close to the high-voltage electrode (10), the dial indicator (7) reads for 2-5mm, the dial indicator (7) is clamped, the numerical value A of the dial indicator is recorded, a beam cutting film (9) is arranged, and the numerical value B of the dial indicator is recorded;
step three: after the dial indicator reading A, B is obtained, the distance between the points is obtained by using the formula C = B-A, a plurality of sinking platforms are arranged on the measuring tool flat plate (3), and the distance between 4 points of C1, C2, C3 and C4 can be obtained at one time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910068728.0A CN109579667B (en) | 2019-01-24 | 2019-01-24 | Device and method for measuring polar distance of charged particle deflection plate of cyclotron |
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| CN201910068728.0A CN109579667B (en) | 2019-01-24 | 2019-01-24 | Device and method for measuring polar distance of charged particle deflection plate of cyclotron |
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| CN109579667A CN109579667A (en) | 2019-04-05 |
| CN109579667B true CN109579667B (en) | 2020-06-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS63127101A (en) * | 1986-11-17 | 1988-05-31 | Metoroole:Kk | Dimension detector |
| CA1293374C (en) * | 1988-06-14 | 1991-12-24 | Brad Diegel | Casing slip gague |
| CN202547550U (en) * | 2012-03-30 | 2012-11-21 | 上海三电汽车空调有限公司 | Detection device for measuring heights and verticality of swash plates |
| CN104019728B (en) * | 2014-05-30 | 2016-08-31 | 福州钜立机动车配件有限公司 | A kind of connecting rod big aperture depth of parallelism and the comprehensive check tool of centre-to-centre spacing |
| CN107333379B (en) * | 2017-08-22 | 2018-03-30 | 合肥中科离子医学技术装备有限公司 | A kind of superconduction bevatron beam bending device |
| CN207075114U (en) * | 2017-08-22 | 2018-03-06 | 合肥中科离子医学技术装备有限公司 | A kind of position regulator for superconducting cyclotron draw-out area |
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