CN105722297A - Hybrid accelerating focusing super-conduction cavity - Google Patents
Hybrid accelerating focusing super-conduction cavity Download PDFInfo
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- CN105722297A CN105722297A CN201610142074.8A CN201610142074A CN105722297A CN 105722297 A CN105722297 A CN 105722297A CN 201610142074 A CN201610142074 A CN 201610142074A CN 105722297 A CN105722297 A CN 105722297A
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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
- H05H7/20—Cavities; Resonators with superconductive walls
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Abstract
The invention relates to a hybrid accelerating focusing super-conduction cavity. Four liquid helium cooling grooves are formed in a super-conduction resonant cavity cylinder and are in parallel to one another, two opposite liquid helium cooling grooves are communicated by a plurality of conical cylinders, a circular ring-shaped accelerating tube is arranged between two conical cylinders, the central lines of the plurality of accelerating tubes and the central line of the super-conduction resonant cylinders are in the same central line, four focusing box are arranged among the accelerating tubes, are perpendicular to one another and are symmetrically fixed on the liquid helium cooling grooves, the conical cylinders communicates with the liquid helium cooling grooves, and liquid helium in the conical cylinders communicates with liquid helium in the liquid helium cooling grooves. The hybrid accelerating focusing super-conduction cavity has the advantages that the hybrid accelerating focusing super-conduction cavity is in a super-conduction state when working in a low-temperature state, the resistance is small, and the high-frequency loss is small; the beam acceleration function and the beam focusing function are combined in the same high-frequency structure, the structure is compact, and the beam quality is excellent; and the length of an accelerator is effectively reduced, and the construction cost of the accelerator is reduced.
Description
Technical field
The present invention relates to a kind of acceleration of ions resonator cavity, belong to accelerator art field.
Background technology
Over nearly twenty or thirty year, along with the raising of industrial technology level, superconduction high-frequency resonant cavity technology obtains fast development.Superconduction high-frequency resonant cavity is compared with room temperature resonator cavity, there is accelerating gradient height, high frequency power loss is little, longtime running cost is low advantage, having attracted the sight of whole world accelerator scholar, the SNS of multiple large-scale accelerator installation such as U.S., FRIB, the spallation neutron target in Europe, Chinese ADS accelerator all have selected superconducting accelerator structure in the world.Superconducting accelerator high-energy section superconductor cavity structure is relatively easy, technical development relative maturity;Low-yield section of superconductor cavity structure of superconducting accelerator is complicated, and ion beam space charge effect is obvious, is the difficult point of superconducting accelerator construction.In superconducting accelerator low energy region, low β superconductor cavity is adopted to accelerate charged particle, charged particle is owing to being subject to space charge effect and HF defocusing effect, line transverse direction envelope is increasing, cause beam loss, needing to utilize the outside original paper that focuses on to carry out horizontal pack to ensure the stable transmission of line, original paper is alternate forms by a lot of low β superconductor cavities and outside focusing for existing superconducting accelerator mental retardation.
Major problem is that of this accelerating structure:
1. many low β superconductor cavities and the outside focusing alternate combination of original paper, space length is long, and accelerator acceleration efficiency is low;
2. accelerator facility installs complexity, and construction cost is high;
3. accelerator original paper is many, and integration is not high, poor stability.
Summary of the invention
It is an object of the invention to avoid the deficiencies in the prior art to provide one mixing to accelerate to focus on superconductor cavity.Solving acceleration and the focusing of the ion beam current of mental retardation Gao Liuqiang, it is to avoid prior art acceleration efficiency is low, accelerator facility installs complexity, construction cost is high, accelerator original paper is many, the problems such as integration is not high, poor stability.
For achieving the above object, the technical scheme that the present invention takes is: a kind of mixing is accelerated to focus on superconductor cavity, and it is mainly characterized by superconducting cavity cylinder and is provided with four parallel each other liquid helium cooling baths, and two relative liquid helium cooling baths are connected by multiple taper cone barrels;The centrage of annular accelerating tube, the centrage of multiple accelerating tubes and superconducting cavity cylinder it is provided with on same centrage between two taper cone barrels;Vertical each other four focus on box and are located between accelerating tube, and symmetry is fixed on liquid helium cooling bath;Taper cone barrel connects with liquid helium cooling bath, and the liquid helium in taper cone barrel circulates mutually with the liquid helium in liquid helium cooling bath.
Described mixing is accelerated to focus on superconductor cavity, and the cross section of described liquid helium cooling bath is rectangle, and four liquid helium cooling baths are axially uniformly distributed along superconducting cavity cylinder.
Described mixing is accelerated to focus on superconductor cavity, and one end that described taper cone barrel diameter is big connects liquid helium groove, and one end that diameter is little connects accelerating tube.
Described mixing is accelerated to focus on superconductor cavity, and described focusing box cross section is rectangle, along superconducting cavity cylinder axial distribution, focuses on box and forms path with liquid helium cooling bath, and the liquid helium focused in box circulates mutually with the liquid helium in liquid helium cooling bath;Four apertures focused between box are 1cm~5cm, and focusing on box length is 1cm~30cm.
Described mixing is accelerated to focus on superconductor cavity, and the length of described accelerating tube is 0.5-20cm;Internal diameter is 1cm~6cm, and the accelerating gap distance between adjacent two accelerating tubes is 0.5-10cm.
Described mixing is accelerated to focus on superconductor cavity, and described is respectively arranged at the two ends with a circular end plate at superconducting cavity cylinder, and two end plates is respectively provided with a line pipe and two cleaning pipes.
Described mixing accelerates to focus on superconductor cavity, and described superconducting cavity cylinder, liquid helium cooling bath, taper cone barrel, accelerating tube, focusing box, end plate, line pipe and the material cleaning pipe are High-purity Niobium.
The invention has the beneficial effects as follows in high intensity proton cyclotron low energy region, owing to acceleration original paper and focusing original paper being integrated in a superconducting cavity, structure is compacter, and space length is short, and accelerator acceleration effect is high;Making owing to have employed superconductor, high-frequency loss is little at low temperatures, and longtime running cost is low;Accelerator original paper is few, and integrated level is high, it is simple to install, it is more stable to run.The present invention is mainly used for intense pulsed ion beam stream and accelerates low energy region.
It is an advantage of the invention that works at low temperatures is in superconducting state, and resistance is little, and high-frequency loss is little;This structure is by beam acceleration function, and beam focusing function is combined in same high-frequency structure, compact conformation so that quality of beam is excellent;Effectively shorten accelerator length, reduce accelerator construction cost.The present invention is mainly used for the acceleration of proton precessional magnetometer, heavy ion avcceleration low energy region proton beam, HIB.
Accompanying drawing illustrates:
Fig. 1 accelerates to focus on superconductor cavity front view for mixing;
Fig. 2 accelerates to focus on superconductor cavity B-B sectional view for mixing;
Fig. 3 accelerates to focus on superconductor cavity C-C sectional view for mixing;
Fig. 4 accelerates to focus on superconductor cavity A-A sectional view for mixing.
In figure: 1. superconducting cavity cylinder;2. end plate;3. clean pipe;4. line pipe;5. liquid helium cooling bath;6. power coupling aperture;7. cooling bath 5 connects with focusing on box 9 inside;8. cooling bath 5 is internal with taper cone barrel 11 connects;9. focus on box;10. accelerating tube;11. taper cone barrel.
Detailed description of the invention
Below in conjunction with embodiment, principles of the invention and feature being described, example is served only for explaining the present invention, is not intended to limit the scope of the present invention.Below present disclosure is described in detail.
Embodiment 1: a kind of mixing is accelerated to focus on superconductor cavity, it is mainly characterized by superconducting cavity cylinder 1 and is provided with four parallel each other liquid helium cooling baths 5, and relative two liquid helium cooling baths 5 are connected by multiple taper cone barrels 11;Being provided with annular accelerating tube 10 between two taper cone barrels 11, multiple accelerating tubes 10 and superconducting cavity cylinder 1 are on a centrage;Vertical each other four focus on box 9 and are located between accelerating tube 10, and symmetry is fixed on liquid helium cooling bath 5.Taper cone barrel 11 and liquid helium cooling bath 5 form path, the liquid helium in taper cone barrel 11 and the liquid helium free flow in liquid helium cooling bath 5.
The cross section of described liquid helium cooling bath 5 is rectangle, and four liquid helium cooling baths 5 are axially uniformly distributed along superconducting cavity cylinder 1.
It is big that described taper cone barrel 11 connects liquid helium groove 5 end diameter, connects accelerating tube 10 end diameter little.
Described focusing box 9 cross section is rectangle, along superconducting cavity cylinder 1 axial distribution, focuses on box 9 and forms path with liquid helium cooling bath 5, focuses on the liquid helium in box 9 and the liquid helium free flow in liquid helium cooling bath 5;Four apertures focused between box are 1cm, and focusing on box 9 length is 1cm.
The length of described accelerating tube 10 is 0.5cm;Internal diameter is 1cm, and the accelerating gap distance between adjacent two accelerating tubes 10 is 0.5cm.
Described is respectively arranged at the two ends with a circular end plate 2 at superconducting cavity cylinder 1, and two end plates 2 is respectively provided with a line pipe 4 and two cleaning pipes 3.
Described superconducting cavity cylinder 1, liquid helium cooling bath 5, taper cone barrel 11, accelerating tube 10, focus on box 9, end plate 2, line pipe 4 and to clean the material of pipe 3 be High-purity Niobium.
Embodiment 2: a kind of mixing is accelerated to focus on superconductor cavity, it is mainly characterized by superconducting cavity cylinder 1 and is provided with four parallel each other liquid helium cooling baths 5, and relative two liquid helium cooling baths 5 are connected by multiple taper cone barrels 11;Being provided with annular accelerating tube 10 between two taper cone barrels 11, multiple accelerating tubes 10 and superconducting cavity cylinder 1 are on a centrage;Vertical each other four focus on box 9 and are located between accelerating tube 10, and symmetry is fixed on liquid helium cooling bath 5.Taper cone barrel 11 and liquid helium cooling bath 5 form path, the liquid helium in taper cone barrel 11 and the liquid helium free flow in liquid helium cooling bath 5.
The cross section of described liquid helium cooling bath 5 is rectangle, and four liquid helium cooling baths 5 are axially uniformly distributed along superconducting cavity cylinder 1.
It is big that described taper cone barrel 11 connects liquid helium groove 5 end diameter, connects accelerating tube 10 end diameter little.
Described focusing box 9 cross section is rectangle, along superconducting cavity cylinder 1 axial distribution, focuses on box 9 and forms path with liquid helium cooling bath 5, focuses on the liquid helium in box 9 and the liquid helium free flow in liquid helium cooling bath 5;Four apertures focused between box are 5cm, and focusing on box 9 length is 30cm.
The length of described accelerating tube 10 is 20cm;Internal diameter is 6cm, and the accelerating gap distance between adjacent two accelerating tubes 10 is 10cm.
Described is respectively arranged at the two ends with a circular end plate 2 at superconducting cavity cylinder 1, and two end plates 2 is respectively provided with a line pipe 4 and two cleaning pipes 3.
Described superconducting cavity cylinder 1, liquid helium cooling bath 5, taper cone barrel 11, accelerating tube 10, focus on box 9, end plate 2, line pipe 4 and to clean the material of pipe 3 be High-purity Niobium.
Embodiment 3: a kind of mixing is accelerated to focus on superconductor cavity, it is mainly characterized by superconducting cavity cylinder 1 and is provided with four parallel each other liquid helium cooling baths 5, and relative two liquid helium cooling baths 5 are connected by multiple taper cone barrels 11;Being provided with annular accelerating tube 10 between two taper cone barrels 11, multiple accelerating tubes 10 and superconducting cavity cylinder 1 are on a centrage;Vertical each other four focus on box 9 and are located between accelerating tube 10, and symmetry is fixed on liquid helium cooling bath 5.Taper cone barrel 11 and liquid helium cooling bath 5 form path, the liquid helium in taper cone barrel 11 and the liquid helium free flow in liquid helium cooling bath 5.
The cross section of described liquid helium cooling bath 5 is rectangle, and four liquid helium cooling baths 5 are axially uniformly distributed along superconducting cavity cylinder 1.
It is big that described taper cone barrel 11 connects liquid helium groove 5 end diameter, connects accelerating tube 10 end diameter little.
Described focusing box 9 cross section is rectangle, along superconducting cavity cylinder 1 axial distribution, focuses on box 9 and forms path with liquid helium cooling bath 5, focuses on the liquid helium in box 9 and the liquid helium free flow in liquid helium cooling bath 5;Four apertures focused between box are 3cm, and focusing on box 9 length is 20cm.
The length of described accelerating tube 10 is 10cm;Internal diameter is 3cm, and the accelerating gap distance between adjacent two accelerating tubes 10 is 5cm.
Described is respectively arranged at the two ends with a circular end plate 2 at superconducting cavity cylinder 1, and two end plates 2 is respectively provided with a line pipe 4 and two cleaning pipes 3.
Described superconducting cavity cylinder 1, liquid helium cooling bath 5, taper cone barrel 11, accelerating tube 10, focus on box 9, end plate 2, line pipe 4 and to clean the material of pipe 3 be High-purity Niobium.
Test example: see Fig. 1, Fig. 2, Fig. 3, Fig. 4, a kind of mixing is accelerated to focus on superconductor cavity, includes a chamber cylinder and two end plates, and described chamber cylinder is cylindrical tube 1, cylinder be respectively provided on two sides with circular end plate 2;Cylinder is provided with four liquid helium cooling baths 5, four liquid helium cooling baths are parallel to each other to be axially uniformly distributed along cylinder, in Fig. 2, two liquefaction cooling baths of vertical direction are connected by 5 support bars, two liquefaction cooling baths of horizontal direction are connected by 7 support bars, and the accelerating tube 10 that support bar is connected by two taper cone barrels 11 is constituted;Four mutually perpendicular focusing boxes 9 constitute one and are mounted between accelerating tube 10, and are fixed on cooling bath 5;Cooling bath 5 connects 7 with focusing on box 9 inside, and cooling bath 5 is internal with taper cone barrel 11 connects 8;In Fig. 3, a cooling bath of lower section is provided with a power coupling aperture 6;Being respectively provided with a line pipe 4 and two cleaning pipes 3 on the end plate 2 of both sides, line pipe 4 is positioned on chamber cylinder 1 axis, and above-mentioned all parts all adopt High-purity Niobium material to make.
Described chamber cylinder 1 diameter is 0.8m, and length is 1.38m, and both sides end plate 2 diameter is 0.8m.
Described accelerating tube 10 length is 4cm, and aperture is 4cm, and the accelerating gap between adjacent two accelerating tubes is 2cm, and the support bar connecting adjacent two accelerating tubes is mutually perpendicular to.
Aperture between described focusing box is 4cm, and focusing on box length is 10cm, and the gap focused between box and accelerating tube is 2cm.
Described power coupling aperture 6 aperture is 5cm, and cleaning pipe 3 aperture is 3cm, and pipe thickness is 0.3cm.
Above-described embodiment is the present invention preferably embodiment; but embodiments of the present invention are also not restricted to the described embodiments; the change made under other any spirit without departing from the present invention and principle, modification, replacement, combination, simplification; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (7)
1. a mixing is accelerated to focus on superconductor cavity, it is characterised in that superconducting cavity cylinder is provided with four parallel each other liquid helium cooling baths, and two relative liquid helium cooling baths are connected by multiple taper cone barrels;The centrage of annular accelerating tube, the centrage of multiple accelerating tubes and superconducting cavity cylinder it is provided with on same centrage between two taper cone barrels;Vertical each other four focus on box and are located between accelerating tube, and symmetry is fixed on liquid helium cooling bath;Taper cone barrel connects with liquid helium cooling bath, and the liquid helium in taper cone barrel circulates mutually with the liquid helium in liquid helium cooling bath.
2. mixing as claimed in claim 1 is accelerated to focus on superconductor cavity, it is characterised in that the cross section of described liquid helium cooling bath is rectangle, and four liquid helium cooling baths are axially uniformly distributed along superconducting cavity cylinder.
3. mixing as claimed in claim 1 is accelerated to focus on superconductor cavity, it is characterised in that one end that described taper cone barrel diameter is big connects liquid helium groove, and one end that diameter is little connects accelerating tube.
4. mixing as claimed in claim 1 is accelerated to focus on superconductor cavity, it is characterized in that described focusing box cross section is rectangle, along superconducting cavity cylinder axial distribution, focusing on box and form path with liquid helium cooling bath, the liquid helium focused in box circulates mutually with the liquid helium in liquid helium cooling bath;Four apertures focused between box are 1cm~5cm, and focusing on box length is 1cm~30cm.
5. mixing as claimed in claim 1 is accelerated to focus on superconductor cavity, it is characterised in that the length of described accelerating tube is 0.5-20cm;Internal diameter is 1cm~6cm, and the accelerating gap distance between adjacent two accelerating tubes is 0.5-10cm.
6. mixing as claimed in claim 1 is accelerated to focus on superconductor cavity, it is characterised in that described is respectively arranged at the two ends with a circular end plate at superconducting cavity cylinder, and two end plates is respectively provided with a line pipe and two cleaning pipes.
7. mixing as claimed in claim 1 is accelerated to focus on superconductor cavity, it is characterised in that described superconducting cavity cylinder, liquid helium cooling bath, taper cone barrel, accelerating tube, focusing box, end plate, line pipe and the material cleaning pipe are High-purity Niobium.
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN111741588A (en) * | 2020-07-02 | 2020-10-02 | 广东太微加速器有限公司 | High-frequency resonance cavity with novel cooling structure |
CN113593768A (en) * | 2021-08-05 | 2021-11-02 | 中国科学院近代物理研究所 | Superconducting cavity solid conduction cooling structure |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN111741588A (en) * | 2020-07-02 | 2020-10-02 | 广东太微加速器有限公司 | High-frequency resonance cavity with novel cooling structure |
CN113593768A (en) * | 2021-08-05 | 2021-11-02 | 中国科学院近代物理研究所 | Superconducting cavity solid conduction cooling structure |
CN113593768B (en) * | 2021-08-05 | 2022-11-01 | 中国科学院近代物理研究所 | Superconducting cavity solid conduction cooling structure |
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