CN108802796A - A kind of compact broadband beam position detector for proton-synchrotron - Google Patents
A kind of compact broadband beam position detector for proton-synchrotron Download PDFInfo
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- CN108802796A CN108802796A CN201810680195.7A CN201810680195A CN108802796A CN 108802796 A CN108802796 A CN 108802796A CN 201810680195 A CN201810680195 A CN 201810680195A CN 108802796 A CN108802796 A CN 108802796A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/29—Measurement performed on radiation beams, e.g. position or section of the beam; Measurement of spatial distribution of radiation
- G01T1/2914—Measurement of spatial distribution of radiation
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Abstract
The invention belongs to particle accelerator method of beam diagnosis fields, and in particular to a kind of compact broadband beam position detector for proton-synchrotron；It solves existing beam position detector narrower bandwidth, the requirement of turn-by-turn system cannot be met and occupies the big problem in accelerator space；Technical solution of the invention is：A kind of compact broadband beam position detector for proton-synchrotron, including vacuum chamber, sleeve, two right angled triangle electrodes, the first ground loop, the second ground loop, signal pickup, further include shading ring.Vacuum chamber includes rectangular vacuum box and the fast acting flange at rectangular vacuum box both ends is arranged, it is arranged sleeve inside rectangular vacuum box, two right angled triangle electrodes are arranged in sleeve inner, shading ring are arranged between two right angled triangle electrodes, shading ring can be along the axial movement of vacuum chamber.The present invention is arranged in the compensating bar of irradiation or medical proton synchrotron ring accelerator, for proton from coil to coil position and closes rail measurement.
Description
Technical field
The present invention relates to particle accelerator method of beam diagnosis fields, and in particular to a kind of for proton-synchrotron
Compact broadband beam position detector.
Background technology
Beam position detector (BPM) is measuring cell necessary to accelerator operation, debugging, accurate from coil to coil position and is closed
Rail measures, and has great importance for optimization, the research of accelerator.For irradiation or medical proton synchrotron ring accelerator,
Its higher frequency changes from hundreds of kHz to several megahertzs, and up to tens megahertzs, detector must have line spectrum width
Good broadband performance could realize the turn-by-turn position measurement of line.
Research finds that BPM broadband performances mainly determine the dependence of frequency by BPM sensitivity and drift, original of searching to the bottom
Because being exactly to determine that coupled capacitor and direct-to-ground capacitance difference are smaller by coupled capacitor between BPM electrodes and BPM electrode direct-to-ground capacitance differences,
Detector broadband performance is better.
As depicted in figs. 1 and 2：Existing BPM includes mainly：Vacuum chamber 101, sleeve 102, right angled triangle electrode 103,
First ground loop 104, the second ground loop 105, signal pickup 106.101 both ends of vacuum chamber are respectively provided with connecting flange, for and
Other components of proton-synchrotron connect.Sleeve 102,102 inside setting at least two of sleeve is arranged in 101 inside of vacuum chamber
Right angled triangle electrode 103 has interelectrode gap 107, right angled triangle electrode between two right angled triangle electrodes 103
103 be fluted body, and bottom surface is rectangle, and two sides are right angled triangle, setting signal pick-up 106 on bottom surface.Right angle three
Ground loop 104 and ground loop 105 is arranged in 103 both ends of angular electrode, and it is poor to reduce BPM electrode direct-to-ground capacitance.Due in sleeve 102
All bolt heads have to be lower than the inner surface of right angled triangle electrode 103, so the bottom surface and side of right angled triangle electrode 103
On be respectively provided with counterbore, two ground loop sides are also provided with counterbore, bolt used on right angled triangle electrode 103 and two ground loops
It is dormant bolt.
Due to having interelectrode gap 107 between two right angled triangle electrodes 103 of existing BPM, coupled between BPM electrodes
Capacitance is larger, and since rigging error be easy to cause capacitance difference, leads to BPM narrower bandwidths, is appropriate only for closing rail measurement, cannot
Meet accurate turn-by-turn system requirement, and existing BPM volumes are big, it is necessary to be provided separately in synchrotron, so occupying empty
Between it is also big.
Invention content
In order to effectively solve existing beam position detector narrower bandwidth, the requirement of turn-by-turn position measurement cannot be met
And the big problem in accelerator space is occupied, the present invention provides a kind of compact broadband lines for proton-synchrotron
Position sensor.
The technical scheme is that：
A kind of compact broadband beam position detector for proton-synchrotron, including：Vacuum chamber, sleeve,
Two right angled triangle electrodes, the first ground loop, the second ground loop, signal pickup, are characterized in that：It further include isolation
Ring；The vacuum chamber includes rectangular vacuum box and the fast acting flange at rectangular vacuum box both ends is arranged；In the rectangular vacuum box
Portion is arranged with sleeve；Two right angled triangle electrodes are arranged in the sleeve inner；Between between the electrode of two right angled triangle electrodes
Setting shading ring compatible with interelectrode gap, the shading ring can be moved along the axial direction of vacuum chamber in gap.
Further, in order to more easily adjust shading ring and realize electrical connection, it is arranged between the shading ring and sleeve
Supporting sleeve, the axially disposed waist-shaped hole of shading ring, bolt are fastened on after passing through the waist-shaped hole, supporting sleeve on sleeve.
Further, in order to which better compensating electric capacity is poor, the position adjustable range of the shading ring is ± 1.5mm.
Further, in order to which electrode positioning is relatively reliable, which further includes being arranged in right angled triangle
Insulation positioning component between electrode and sleeve；The insulation positioning component includes ceramics pole and ceramic gasket, the ceramics pole
For step type, and it is intermediate be equipped with through-hole, in the counterbore of ceramics pole small end insertion sleeve side, the second dormant bolt passes through right angle three
It is fastened by nut and sleeve after angular electrode, ceramics pole and ceramic gasket.
Further, the insulation positioning component quantity is n, wherein n >=3.
Further, for machining accuracy higher, the right angled triangle electrode is converted by trapezoidal thin stainless steel plate.
Further, the spacing between the right angled triangle electrode and the first ground loop, the second ground loop is 2mm.
Further, the supporting sleeve material is stainless steel.
Further, for better tightness, the end face setting sealing edge of a knife of the fast acting flange, for matching with copper washer
It closes and realizes vacuum sealing.
The advantageous effect of the present invention compared with prior art is：
1, the beam position detector is reduced and is coupled between electrode, and pass through and adjust shading ring by the way that shading ring is arranged
It is poor that position can compensate for electrode direct-to-ground capacitance, and detector is made to have good broadband performance, can be achieved within the scope of 0~60MHz
It is accurate to measure, it can be achieved that accurate turn-by-turn position measurement；The beam position detector uses three layers of cramped construction, and vacuum box is
Rectangle can be placed directly in compensating bar, thus it is small to occupy accelerator space.
2, waist-shaped hole is set on shading ring, adjustment only need to slightly looser a bolt when ring position is isolated, more convenient operation.
3, the position adjustable range of shading ring is ± 1.5mm, can compensate for causing due to processing or installation error etc.
Two right angled triangle electrode direct-to-ground capacitance it is poor, corresponding capacitance deviation adjustment capability 3.4pF, electrode capacitance difference smaller.
4, ceramics pole is stepped, and in insertion sleeve, positioning is more reliable.
5, right angled triangle electrode is converted by trapezoidal thin stainless steel plate, machining accuracy higher.
6, the electrical connection that the beam position detector uses is connected through a screw thread or elastic compression is realized, is not required to weld,
Simplify manufacturing process.
Description of the drawings
Fig. 1 is the structural schematic diagram of existing beam position detector；
Fig. 2 is the vertical view of Fig. 1；
Fig. 3 is the structural schematic diagram of present pre-ferred embodiments；
Fig. 4 is the A-A sectional views of Fig. 3；
Fig. 5 is the connection figure of signal sensor and right angled triangle electrode in the embodiment；
Fig. 6 is the structural schematic diagram of extraction pole in the embodiment；
Fig. 7 is the connection figure of insulation positioning component in the embodiment；
Fig. 8 is the structural schematic diagram of right angled triangle electrode in the embodiment；
Fig. 9 is the structural schematic diagram of shading ring in the embodiment；
Figure 10 is the installation diagram of the embodiment and compensating bar；
Reference numeral is in figure：101- vacuum chambers, 102- sleeves, 103- right angled triangle electrodes, the first ground loops of 104-,
The second ground loops of 105-, 106- signal pickups, 107- interelectrode gaps, 201- vacuum chambers, 202- sleeves, 203- right angle trigonometries
Shape electrode, the first ground loops of 204-, the second ground loops of 205-, 206- signal pickups, 207- shading rings, 208- rectangular vacuums
Box, the fast acting flanges of 209-, 210- interelectrode gaps, 211- supporting sleeves, 212- waist-shaped holes, 213- bolts, 214- insulation positioning groups
Part, 215- ceramics poles, 216- ceramic gaskets, the first counterbores of 217-, the first dormant bolts of 218-, 219 nuts, 220- connection methods
Orchid, 221- connecting tubes, 222- extraction poles, the second dormant bolts of 223-, 224- electrodes bottom surface, 225- cross recesses, 226- coaxially connect
Head, 227- third dormant bolts, 228- electrode sides, the second counterbores of 229-, 230- compensating bars.
Specific implementation mode
Below in conjunction with drawings and the specific embodiments, the present invention will be further described.
With reference to Fig. 3 and Fig. 4, which includes 202, two vacuum chamber 201, sleeve right angled triangle electrodes
203, shading ring 207, the first ground loop 204, the second ground loop 205, insulation positioning component 214 and signal pickup 206.
Vacuum chamber 201 is arranged in the beam position detector outermost, and vacuum chamber 201 includes rectangular vacuum box 208 and connection
Fast acting flange 209 at 208 both ends of rectangular vacuum box, 209 end face of fast acting flange edge of a knife feature containing sealing, for matching with copper washer
It closes and realizes vacuum sealing, this structure conveniently fast disassembling.Company of 201 side of the vacuum chamber setting for fixed signal pick-up 206
Acting flange 220, connecting flange 220 are fixed on by connecting tube 221 on vacuum chamber side wall；It is arranged inside rectangular vacuum box 208
Cylinder 202, sleeve 202 is fastened on 208 side wall of rectangular vacuum box.
Two right angled triangle electrodes 203 are arranged in 202 inside of sleeve, and right angled triangle electrode 203 is stainless steel material, is led to
It crosses two 203 faradic sizes of right angled triangle electrode and calculates beam position；203 surface of right angled triangle electrode is equipped with
11 counter sinks, wherein 10 are used to connect with ceramics pole 215, remaining 1 with extraction pole 222 for connecting.
The first ground loop 204 and the second ground loop 205 is respectively set in two 203 both ends of right angled triangle electrode, and two connect
Ground ring is fastened on by the second dormant bolt 223 on sleeve 202, and the spacing of two ground loops and right angled triangle electrode 203 is equal
For 2mm.
Shading ring 207, shading ring 207 and sleeve are set in the interelectrode gap 210 of two right angled triangle electrodes 203
202 are fastened by bolt 213, and the supporting sleeve 211 by being arranged on bolt 213 is electrically connected；211 material of supporting sleeve is
Stainless steel ensures that shading ring 207 is grounded.Since shading ring 207 is fastened with sleeve 202 by bolt 213, so adjustment shading ring
It only need to slightly looser a bolt 213 when 207 position.
Signal pickup 206 is respectively provided on two electrode bottom surfaces 224, signal pickup 206 is fixed on connecting flange 220
On.
As shown in Figure 5 and Figure 6, signal pickup 206 includes extraction pole 222 and coaxial fitting 226,222 one end of extraction pole
It is electrically connected with right angled triangle electrode 203, the other end cuts cross recess 225 after beating endoporus, and is electrically connected with coaxial fitting 226；
Extraction pole 222 selects beryllium-bronze material, and elasticity is good, the inner core for clamping coaxial interface 226 that can be tighter.When installation, third is first used
Dormant bolt 227 fastens right angled triangle electrode 203 and extraction pole 222, then upper copper washer is covered on coaxial fitting 226, then
It is inserted into hole of the extraction pole 222 with cross recess 225, since to be slightly less than 226 inner core of coaxial fitting straight for the diameter of bore of extraction pole 222
Diameter, when tightening the flange of coaxial fitting 226, the inner core of coaxial fitting 226 is brought out pole 222 and constantly compresses, and realizes reliable electricity
Connection.
As shown in fig. 7, setting insulation positioning component 214 between right angled triangle electrode 203 and sleeve 202, insulation positioning
Component 214 includes ceramics pole 215 and ceramic gasket 216；Ceramics pole 215 be multi-diameter shaft, center be equipped with through-hole, multi-diameter shaft it is small
In the first counterbore 217 for holding insertion sleeve 202, right angled triangle electrode 203 is at a distance from sleeve 202 completely by ceramics pole 215
Big end length determine, it is easier to ensure that tolerance, the first dormant bolt 218 sequentially pass through right angled triangle electrode 203, ceramics pole
215, it after sleeve 202 and ceramic gasket 216, is fastened by nut 219 and sleeve 202, ceramics pole 215 and ceramic gasket 216 can
Ensure the insulation of right angled triangle electrode 203 and sleeve 202.
As shown in figure 8, right angled triangle electrode 203 is formed using trapezoidal plate bending, shape is fluted body, electrode bottom surface
224 be rectangle, and two electrode sides 228 are right angled triangle, and electrode bottom surface 224 and electrode side 228 are respectively provided with the second counterbore
229。
As shown in figure 9,207 cross section of shading ring is diamond shape, and the axially disposed waist-shaped hole 212 in four sides, shading ring
207 width 7mm, 212 effective length of waist-shaped hole are 3mm, and the position adjustable range of shading ring 207 is ± 1.5mm, and corresponding capacitance is inclined
Poor adjustment capability 3.4pF.
As shown in Figure 10, entire detector is placed in compensating bar 230, and accelerator bunch is mounted on as a whole with compensating bar
On.
One kind that the present embodiment provides is used for proton synchrotron ring accelerator compact broadband beam position detector, passes through
Adjustable shading ring 207 is set, electrode coupling is reduced, it can also be by adjusting the position compensation electrode of shading ring 207 over the ground
Capacitance difference makes detector have good broadband performance；Detector compact mechanical structure, volume is suitable with vacuum pipe, can set
In in compensating bar 230；Detector electrical connection use is bolted or compresses realization, avoids the welding in assembling process, simplifies
Manufacturing process, it is easy to loading and unloading.
Example the above is only the implementation of the present invention is not intended to limit the scope of the invention, every to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field is similarly included in the scope of patent protection of the present invention.
Claims (9)
1. a kind of compact broadband beam position detector for proton-synchrotron, including：Vacuum chamber (201), set
Cylinder (202), two right angled triangle electrodes (203), the first ground loop (204), the second ground loop (205), signal pickup
(206), it is characterised in that：
Further include shading ring (207)；The vacuum chamber (201) includes rectangular vacuum box (208) and is arranged in rectangular vacuum box
(208) the fast acting flange (209) at both ends；Rectangular vacuum box (208) internal sleeve is equipped with sleeve (202)；The sleeve (202)
Two right angled triangle electrodes (203) of inside setting；
It is provided in the interelectrode gap (210) of two right angled triangle electrodes (203) compatible with interelectrode gap (210)
Shading ring (207), the shading ring (207) can be along the axial movement of vacuum chamber (201).
2. a kind of compact broadband beam position detector for proton-synchrotron according to claim 1,
It is characterized in that：Supporting sleeve (211) is set between the shading ring (207) and sleeve (202), and shading ring (207) is set in an axial direction
Waist-shaped hole (212) is set, bolt (213) is fastened on after passing through the waist-shaped hole (212), supporting sleeve (211) on sleeve (202).
3. a kind of compact broadband beam position detector for proton-synchrotron according to claim 1,
It is characterized in that：The shaft orientation moving range of the shading ring (207) is ± 1.5mm.
4. a kind of compact broadband beam position detector for proton-synchrotron according to claim 2,
It is characterized in that：It further include the insulation positioning component (214) being arranged between right angled triangle electrode (203) and sleeve (202)；
The insulation positioning component (214) includes ceramics pole (215) and ceramic gasket (216), and the ceramics pole (215) is step type,
And it is intermediate equipped with through-hole, first counterbore (217) of small end insertion sleeve (202) side of ceramics pole (215) is interior, the first countersunk head spiral shell
Bolt (218) sequentially passes through after right angled triangle electrode (203), ceramics pole (215) and ceramic gasket (216) through nut (219)
It is fastened with sleeve (202).
5. a kind of compact broadband beam position detector for proton-synchrotron according to claim 4,
It is characterized in that：Insulation positioning component (214) quantity is n, wherein n >=3.
6. a kind of compact broadband beam position detector for proton-synchrotron according to claim 5,
It is characterized in that：The right angled triangle electrode (203) is converted by trapezoidal thin stainless steel plate.
7. a kind of compact broadband beam position detector for proton-synchrotron according to claim 6,
It is characterized in that：Spacing between the right angled triangle electrode (203) and the first ground loop (204), the second ground loop (205)
It is 2mm.
8. a kind of compact broadband beam position detector for proton-synchrotron according to claim 7,
It is characterized in that：Supporting sleeve (211) material is stainless steel.
9. being visited according to a kind of any compact broadband beam positions for proton-synchrotron claim 1-8
Survey device, it is characterised in that：The end face setting sealing edge of a knife of the fast acting flange (209), for realizing vacuum with copper washer cooperation
Sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810680195.7A CN108802796B (en) | 2018-06-27 | 2018-06-27 | Compact type broadband beam position detector for proton synchrotron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810680195.7A CN108802796B (en) | 2018-06-27 | 2018-06-27 | Compact type broadband beam position detector for proton synchrotron |
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| Publication Number | Publication Date |
|---|---|
| CN108802796A true CN108802796A (en) | 2018-11-13 |
| CN108802796B CN108802796B (en) | 2020-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810680195.7A Active CN108802796B (en) | 2018-06-27 | 2018-06-27 | Compact type broadband beam position detector for proton synchrotron |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114236602A (en) * | 2021-12-17 | 2022-03-25 | 中国工程物理研究院流体物理研究所 | Design method of beam calibration device |
| CN117156656A (en) * | 2023-10-25 | 2023-12-01 | 西安聚能医工科技有限公司 | Movable extraction electrode for laser ablation plasma |
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| CN1415076A (en) * | 1999-12-29 | 2003-04-30 | 埃克斯康特尔股份公司 | Method and apparatus for radiography and radiation detector |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114236602A (en) * | 2021-12-17 | 2022-03-25 | 中国工程物理研究院流体物理研究所 | Design method of beam calibration device |
| CN117156656A (en) * | 2023-10-25 | 2023-12-01 | 西安聚能医工科技有限公司 | Movable extraction electrode for laser ablation plasma |
| CN117156656B (en) * | 2023-10-25 | 2024-01-09 | 西安聚能医工科技有限公司 | Movable extraction electrode for laser ablation plasma |
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| CN108802796B (en) | 2020-05-05 |
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