CN106455287A - Imbalanced dual-inner-rod spiral high-frequency resonant cavity of superconductive cyclotron - Google Patents
Imbalanced dual-inner-rod spiral high-frequency resonant cavity of superconductive cyclotron Download PDFInfo
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- CN106455287A CN106455287A CN201610614005.2A CN201610614005A CN106455287A CN 106455287 A CN106455287 A CN 106455287A CN 201610614005 A CN201610614005 A CN 201610614005A CN 106455287 A CN106455287 A CN 106455287A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H7/00—Details of devices of the types covered by groups H05H9/00, H05H11/00, H05H13/00
- H05H7/14—Vacuum chambers
- H05H7/18—Cavities; Resonators
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H13/00—Magnetic resonance accelerators; Cyclotrons
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Abstract
The invention relates to an imbalanced dual-inner-rod spiral high-frequency resonant cavity of a superconductive cyclotron, and belongs to the research field of the cyclotron. The imbalanced dual-inner-rod spiral high-frequency resonant cavity comprises a) an asymmetrical spiral accelerating electrode; b) accelerating gaps with asymmetrical angular widths on the two sides of the electrode; c) two inner conductors having different diameters and lengths and connected with the accelerating electrode; d) an asymmetrical spiral cavity shell; and e) fine-tuning capacitors on the top and bottom of the cavity. The high-frequency cavity structure provided by the invention can realize large-scale regulation of the cavity resonant frequency and voltage distribution by adjusting the heights and positions of the two inner rods, and the above-mentioned parameters can be subjected to fine tuning by changing the angular widths of the accelerating gap between the accelerating electrode and the spiral shell. By adoption of the imbalanced dual-inner-rod spiral high-frequency resonant cavity for satisfying the requirement of the high-frequency system cavity of the superconductive cyclotron, the voltage in the concave position of a voltage distribution curve of the high-frequency cavity is effectively improved; the overall voltage distribution of the cavity is improved; and the eduction of accelerating particles from the cyclotron can be facilitated.
Description
Technical field
Present invention relates particularly to a kind of uneven double interior bar spiral type high-frequency resonant cavities of superconducting cyclotron, belong to superconduction
Cyclotron technical field.
Background technology
, as the important component part of superconducting cyclotron project, wherein high-frequency resonant cavity is in high frequency system for radio frequency system
Vital effect is played, energy needed for particle moves in cyclotron is to be provided by high-frequency resonant cavity in system.Work as grain
When the accelerating gap of cavity, because high-frequency resonant cavity two border has electric potential difference, solid particless obtains energy and is accelerated son.?
In common cyclotron, accelerator centre area voltage is low, and tail voltage is high, so contributes to minimizing accelerator centre area and sends out
The number of times of raw spark phenomenon, is conducive to accelerated particle to draw from accelerator simultaneously.The electric capacity of single interior bar structure high-frequency resonant cavity
Skewness weigh, lead to its voltage distribution curves to have a big recess near interior bar position, be unfavorable for particle from return
Draw in rotation accelerator.
Content of the invention
For the voltage of the single interior bar structure high-frequency resonant cavity voltage distribution curves recess of lifting, make voltage's distribiuting more equal
Weighing apparatus, under the premise of making full use of the spiral type Gu Qu space of superconducting cyclotron it is proposed that a kind of superconducting cyclotron not
The invention of the double interior bar spiral type high frequency cavity of balance.
For improving the problem of single interior bar structure high-frequency resonant cavity voltage distribution curves depression, lifting particle accelerates uneven electricity
Pressure, technical scheme is as follows：
First, high-frequency resonant cavity mainly includes：Spiral type accelerates battery lead plate, spiral type shell cavity, radius and length each
Interior bar, the cylindrical outer conductor of rear interior bar and the trimmer being located at shell cavity top and bottom before and after differing.
Wherein, interior bar all accelerates battery lead plate and shell cavity to be fixedly connected with spiral type using flange respectively in front and back；Upper and lower two acceleration
Battery lead plate is connected at two ends.
Secondly, a kind of invention of the uneven double interior bar spiral type high frequency cavitys of superconducting cyclotron is mainly reflected in：a)
Accelerate the asymmetric of accelerating gap angular breadth between battery lead plate and spiral type shell cavity；B) accelerate battery lead plate edge chamfer
Asymmetric；C) forward and backward interior pole length and radius is inconsistent；D) the position deviation chamber central line of forward and backward interior bar.
Further, uneven double interior bar spiral type high frequency cavitys of a kind of superconducting cyclotron as above, wherein institute
Asymmetric, the regulation accelerating gap angular breadth accelerating accelerating gap angular breadth between battery lead plate and spiral type shell cavity stated,
Control the distribution of the parallel impedance of cavity.
Further, uneven double interior bar spiral type high frequency cavitys of a kind of superconducting cyclotron as above, wherein institute
The acceleration battery lead plate edge chamfer stated asymmetric, by using asymmetrical corner cut mode up and down, reduce accelerate battery lead plate with
Electric capacity between shell cavity.
Further, uneven double interior bar spiral type high frequency cavitys of a kind of superconducting cyclotron as above, wherein institute
The forward and backward interior pole length stated is inconsistent with radius, the position of interior bar and thickness before and after adjusting as needed, realizes to cavity frequency
Rate, the regulation on a large scale of voltage's distribiuting.
Further, uneven double interior bar spiral type high frequency cavitys of a kind of superconducting cyclotron as above, wherein institute
The position deviation chamber central line of the forward and backward interior bar stated, enters side near shell cavity, somewhat improves cavity voltage's distribiuting.
Further, uneven double interior bar spiral type high frequency cavitys of a kind of superconducting cyclotron as above, wherein before
In spiral type shell cavity, rear interior bar passes spiral type shell cavity to interior bar, is led by outside cylinder beyond shell cavity part
Body surrounds, and the thickness of the internal diameter of its outer conductor and rear interior bar all affects the size of distributed inductance value, and then changes the resonance of cavity
Frequency.
Further, uneven double interior bar spiral type high frequency cavitys of a kind of superconducting cyclotron as above, its middle position
In the trimmer of shell cavity top and bottom, change the distance between trimmer and shell cavity top, can be to cavity
Resonant frequency is finely adjusted, and regulated quantity is about 0.3MHz.
The present invention is directed to the demand of superconducting cyclotron radio frequency system cavity, effectively improves high-frequency codon and divides
Voltage at cloth curvilinear indentations, improves the global voltage distribution of cavity, is conducive to accelerated particle to draw from cyclotron.
Brief description
Fig. 1 is high-frequency resonant cavity schematic diagram；
Fig. 2 is shell cavity and acceleration battery lead plate chamfering schematic diagram；
Fig. 3 is high-frequency resonant cavity voltage distribution curves.
Specific embodiment
With reference to the accompanying drawings and examples the present invention is described in detail.
The design accelerates battery lead plate (1), front interior bar (2), trimmer (3), rear interior bar as shown in figure 1, including spiral type
(4), rear interior bar outer conductor (5) and shell cavity (6), upper lower half chamber is symmetrically consistent.Wherein, interior bar is all distinguished using flange in front and back
Battery lead plate and shell cavity is accelerated to be fixedly connected with spiral type；The afterbody of upper and lower two acceleration battery lead plates is connected with each other；After described
Interior bar outer conductor surround described rear interior bar positioned at shell cavity with outer portion, trimmer adopts flange with shell cavity even
Connect.Its spiral type accelerates the accelerating gap angular breadth between battery lead plate and shell cavity adjustable, controls the parallel impedance of cavity
Distribution.The thickness accelerating battery lead plate is 15mm, and the distance between upper and lower two acceleration battery lead plates are 40mm, accelerate the side of battery lead plate
Edge is designed by the way of asymmetric corner cut, and its shell cavity is as shown in Figure 2 with the chamfer design accelerating battery lead plate.Resonator cavity
Front interior bar, in spiral type shell cavity, does not pass shell cavity, reduces Magnet and punches quantity, is conducive to the steady of accelerator magnet
Gu.The rear interior bar of resonator cavity passes spiral type shell cavity, is surrounded by cylindrical outer beyond shell cavity part, and adjustment is outer
The thickness of the internal diameter of conductor and rear interior bar determines the size of distributed inductance value.The fine setting of cavity resonant frequency can be finely tuned by change
Realizing, regulated quantity is about 0.3MHz for the distance between electric capacity and shell cavity top.In order to improve the electricity of resonator cavity further
Pressure distribution curve, rear interior bar deviates chamber central line, enters side near shell cavity, and that is, rear interior bar abscissa is constant, under vertical coordinate
Move, the voltage distribution curves of its resonator cavity are as shown in Figure 3.
Knowable to high-frequency resonant cavity distribution map of the electric field, it accelerates battery lead plate head and afterbody electric field ratio larger；From height
Frequency resonator cavity power attenuation scattergram understands, cavity double interior bar positions power attenuation ratio is larger, the forward and backward interior bar of cavity and chamber
Body afterbody is required to water-cooled cooling, to guarantee accelerator stable operation.
The resonant frequency of the high-frequency resonant cavity of the present invention is 72.44MHz, and Q-unloaded is 8600, the work(of resonator cavity
Rate loss is about 20.6KW.
Obviously, those skilled in the art can carry out the various changes and modification essence without deviating from the present invention to the present invention
God and scope.So, if these modifications to the present invention and modification belong to the model of the claims in the present invention and its equivalent technology
Within enclosing, then the present invention is also intended to comprise these changes and modification.
Claims (9)
1. a kind of uneven double interior bar spiral type high-frequency resonant cavities of superconducting cyclotron it is characterised in that：
Described high-frequency resonant cavity includes：Spiral type accelerates outside battery lead plate, spiral type shell cavity, front interior bar, rear interior bar, rear interior bar
Conductor and the trimmer being located at described spiral type shell cavity top and bottom；
Wherein, described forward and backward interior bar all accelerates battery lead plate and spiral type shell cavity to be fixedly connected using flange and spiral type；Institute
State trimmer to be connected with spiral type shell cavity using flange.
2. the uneven double interior bar spiral type high-frequency resonant cavities of superconducting cyclotron as claimed in claim 1 it is characterised in that：
The described accelerating gap angular breadth accelerating between battery lead plate and spiral type shell cavity is adjustable, to control the resistance in parallel of cavity
Anti- distribution.
3. the uneven double interior bar spiral type high-frequency resonant cavities of superconducting cyclotron as claimed in claim 1 it is characterised in that：
The described edge accelerating battery lead plate adopts asymmetric corner cut.
4. the uneven double interior bar spiral type high-frequency resonant cavities of superconducting cyclotron as claimed in claim 1 it is characterised in that：
The radius of described forward and backward interior bar is all differed with length, and before and after adjusting as needed, the position of interior bar and thickness can achieve
Regulation on a large scale to cavity frequency, voltage's distribiuting.
5. the uneven double interior bar spiral type high-frequency resonant cavities of superconducting cyclotron as claimed in claim 1 it is characterised in that：
Change the distance between trimmer and shell cavity top, cavity resonant frequency can be finely adjusted.
6. the uneven double interior bar spiral type high-frequency resonant cavities of superconducting cyclotron as claimed in claim 1 it is characterised in that：
Described front interior bar is located in spiral type shell cavity.
7. the uneven double interior bar spiral type high-frequency resonant cavities of superconducting cyclotron as claimed in claim 1 it is characterised in that：
Described rear interior bar passes spiral type shell cavity, is surrounded by described rear interior bar outer conductor beyond shell cavity part.
8. the uneven double interior bar spiral type high-frequency resonant cavities of superconducting cyclotron as claimed in claim 1 it is characterised in that：
Described forward and backward interior bar is not on the centrage of high-frequency resonant cavity.
9. the uneven double interior bar spiral type high-frequency resonant cavities of superconducting cyclotron as claimed in claim 1 it is characterised in that：
Described spiral type accelerates battery lead plate (1) to include upper and lower two acceleration battery lead plates, the afterbody phase interconnection of above-mentioned two battery lead plate
Connect.
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Cited By (7)
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| CN107889337A (en) * | 2017-12-13 | 2018-04-06 | 合肥中科离子医学技术装备有限公司 | A kind of superconducting cyclotron T-shaped inner wire spiral shape resonator |
| CN108024438A (en) * | 2017-12-13 | 2018-05-11 | 合肥中科离子医学技术装备有限公司 | One kind is used for superconducting cyclotron RF resonator c-type electric connection structures |
| CN109862685A (en) * | 2019-03-11 | 2019-06-07 | 王飞 | A kind of high frequency cavity and its adjusting method with real-time, tunable formula capacitor |
| WO2019114539A1 (en) * | 2017-12-13 | 2019-06-20 | 合肥中科离子医学技术装备有限公司 | Spiral resonant cavity having t-shaped inner conductor for superconducting cyclotron |
| CN110213878A (en) * | 2019-05-29 | 2019-09-06 | 中国科学院近代物理研究所 | A kind of high-frequency resonant cavity |
| CN112930021A (en) * | 2021-03-11 | 2021-06-08 | 中国原子能科学研究院 | Leveling and aligning device of high-frequency D plate |
| CN116033642A (en) * | 2023-01-09 | 2023-04-28 | 中国科学院近代物理研究所 | High-frequency device of high-current superconducting cyclotron |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107889337A (en) * | 2017-12-13 | 2018-04-06 | 合肥中科离子医学技术装备有限公司 | A kind of superconducting cyclotron T-shaped inner wire spiral shape resonator |
| CN108024438A (en) * | 2017-12-13 | 2018-05-11 | 合肥中科离子医学技术装备有限公司 | One kind is used for superconducting cyclotron RF resonator c-type electric connection structures |
| WO2019114539A1 (en) * | 2017-12-13 | 2019-06-20 | 合肥中科离子医学技术装备有限公司 | Spiral resonant cavity having t-shaped inner conductor for superconducting cyclotron |
| CN108024438B (en) * | 2017-12-13 | 2019-07-05 | 合肥中科离子医学技术装备有限公司 | One kind being used for superconducting cyclotron RF resonant cavity c-type electric connection structure |
| CN107889337B (en) * | 2017-12-13 | 2024-07-02 | 合肥中科离子医学技术装备有限公司 | Spiral resonant cavity of T-shaped inner conductor of superconducting cyclotron |
| CN109862685A (en) * | 2019-03-11 | 2019-06-07 | 王飞 | A kind of high frequency cavity and its adjusting method with real-time, tunable formula capacitor |
| CN109862685B (en) * | 2019-03-11 | 2020-12-22 | 王飞 | High-frequency cavity with real-time adjustable capacitor and adjusting method thereof |
| CN110213878A (en) * | 2019-05-29 | 2019-09-06 | 中国科学院近代物理研究所 | A kind of high-frequency resonant cavity |
| CN112930021A (en) * | 2021-03-11 | 2021-06-08 | 中国原子能科学研究院 | Leveling and aligning device of high-frequency D plate |
| CN116033642A (en) * | 2023-01-09 | 2023-04-28 | 中国科学院近代物理研究所 | High-frequency device of high-current superconducting cyclotron |
| CN116033642B (en) * | 2023-01-09 | 2023-09-26 | 中国科学院近代物理研究所 | High-frequency device of high-current superconducting cyclotron |
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