CN101715272A - Loading and frequency conversion tuning cavity of large power ferrite - Google Patents
Loading and frequency conversion tuning cavity of large power ferrite Download PDFInfo
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- CN101715272A CN101715272A CN 200910165484 CN200910165484A CN101715272A CN 101715272 A CN101715272 A CN 101715272A CN 200910165484 CN200910165484 CN 200910165484 CN 200910165484 A CN200910165484 A CN 200910165484A CN 101715272 A CN101715272 A CN 101715272A
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Abstract
The invention mainly relates to a loading and frequency conversion tuning cavity of a large power ferrite. The tuning cavity comprises a left resonant cavity (1) and a right resonant cavity (2) which are coaxially and oppositely arranged; a plurality of cavity loaded ferrite magnetic rings (6) are filled between an inner conductor (15) and an outer conductor (16) of the right resonant cavity (2); an insulating tetrafluoride medium (8) is filled between the inner diameters of the ferrite magnetic rings (6) and the inner conductor (15); a first field bias coil conductor (9) is arranged in the insulating tetrafluoride medium (8); a second field bias coil conductor (10) is installed at the outer part of the ferrite magnetic ring (6); a vacuum chamber (3) is arranged in the center of the inner conductor (15) of the right resonant cavity (2); a corrosion resistant casing (23) is installed at the outer part of the right resonant cavity (2); and a supporting corrosion resistant plate (17) is arranged on the side of the right resonant cavity (2). The tuning cavity can not only be operated in frequency sweep impulse modulation mode, but also be operated in radio frequency continuous wave mode within the frequency range of 0.5 MHz to 2 MHz, and meets the requirement of double mode operation of a CSR experimental ring high frequency system.
Description
Technical field:
The present invention is chiefly directed to and forms the high-frequency and high-voltage electric field under the vacuum condition, and, relate in particular to a kind of loading and frequency conversion tuning cavity of large power ferrite in the broadband high-frequency and high-voltage synchrotron device technique field that the ferrite that the line direction of motion is captured, quickened or slow down heavy particle beam loads.
Background technology:
Before this, domestic have only The CAS Institute of Modern Physics that a synchrotron made from Russian co-design ferrite loading and frequency conversion tuning coaxial resonant cavity body is arranged, be used for Lanzhou heavy particle accelerator cooling storage ring (CSR) main ring, halved tie stream is captured, and quickens.This cavity is because simple in structure, and the highest average high frequency power that can bear is no more than 2kW, and can only be operated in duty ratio less than 1/2 scanning frequency pulse pattern, operating frequency range 0.25MHz～1.7MHz.
CSR main ring cavity is made up of two cavitys that are added with ferrite bead, be filled with 34 internal diameter 350mm between the internal and external conductor of each cavity, external diameter 540mm, the ferrite bead of thickness 22mm, the copper cash that 96 diameters being parallel to main shaft are arranged between ring internal diameter and the inner wire is 4mm is as the ring part of magnetic bias coil, every circle external chiasma in the middle part in each chamber of coil; Between ring internal diameter and inner wire and embedding have silicon rubber to be used for insulation, the high-frequency dielectric loss is bigger; As heat transmission, radiating effect is relatively poor every the copper coin of two magnet rings folder a slice thickness 2; In addition, the tuning capacity of cavity is selected lower-powered ceramic condenser for use.Therefore, cavity can only be operated in the less scanning frequency pulse pattern of average power.Bigger in duty ratio, when cavity voltage is higher, or under the continuous wave working condition, the ferrite temperature can be too high, and dielectric can generate heat, and tuning capacity can burn.
Summary of the invention:
The objective of the invention is to avoid the deficiencies in the prior art part and a kind of loading and frequency conversion tuning cavity of large power ferrite is provided, thereby efficiently solve the problems of the prior art.
Purpose of the present invention can be by realizing by the following technical solutions: described loading and frequency conversion tuning cavity of large power ferrite, include coaxial left resonant cavity (1) staggered relatively and right resonant cavity (2), its characteristics are: be filled with the ferrite bead (6) that the multi-disc cavity loads between the inner wire (15) of described right resonant cavity (2) and the outer conductor (16), be filled with insulation tetrafluoro medium (8) between the internal diameter of ferrite bead (6) and the inner wire (15), be provided with the first magnetic bias coil-conductor (9) in the insulation tetrafluoro medium (8), the outside of ferrite bead (6) is equipped with the second magnetic bias coil-conductor (10), in the middle of the inner wire (15) of right resonant cavity (2) is vacuum chamber (3), stainless steel casing (23) is equipped with in the outside of right resonant cavity (2), and the sidepiece of right resonant cavity (2) is provided with and supports corrosion resistant plate (17).
Described ferrite core (6) is 20, be provided with water flowing cooler pan (7) between per two ferrite beads (6), water flowing cooler pan (7) links to each other with outside feed pipe by water inlet pipe and water outlet pipe joint (21), and ferrite bead (6) and water flowing cooler pan (7) are installed on the resonant cavity by the supporter (20) of resonant cavity bottom.Described vacuum chamber (3) links to each other by brace (19) with inner wire (15), and the outside of vacuum chamber (3) is provided with heating tape and heat-insulation layer (22).
Described left resonant cavity (1) is identical with right resonant cavity (2) structure, and symmetry connects.Described left resonant cavity (1) and right resonant cavity (2) connection are provided with feed bonding conductor (18) and magnetic bias coil interconnection place (11); vacuum chamber junction in left side resonant cavity (1) and the right resonant cavity (2) is provided with insulating ceramics (4) and accelerating slit (5); insulating ceramics (4) vacuum chamber junction is provided with bellows (12); protection ceramicto-metal seal position is not fragile; accelerating slit (5) both sides link to each other with the inner wire open end of left resonant cavity (1) with right resonant cavity (2) respectively; accelerating slit (5) both sides link to each other with cavity resonant high voltage vacuum capacitors (14) again, and the two ends of the vacuum chamber in left resonant cavity (1) and the right resonant cavity (2) are equipped with bracing or strutting arrangement (13).
The invention has the beneficial effects as follows: described loading and frequency conversion tuning cavity of large power ferrite, adopt the medium of filling between inner wire and magnet ring to select the good polytetrafluoroethylene dielectric material of high frequency performance for use, and solve its processing and forming; In the ferrite core both sides, between ring and the ring water of radiation cold dish is set, and solves the manufacture craft of aqueous cold plate; The cavity tuning capacity is selected for use high withstand voltage, high power ceramic vacuum electric capacity; The magnetic bias coil intersects in the middle part of two cavitys; Cavity such as can dismantle repeatedly at design and structure, in 0.5MHz～2MHZ frequency range, cavity not only can be worked under the scanning frequency pulse modulating mode, but also can work under the continuous wave mode frequently at electricity, peak is pressed and can be reached peak-to-peak value 17kV, satisfied CSR experimental ring radio frequency system double mode job requirement.This cavity can be operated in the scanning frequency pulse modulating mode, and cavity voltage is up to the electricity frequency continuous wave mode of operation of 17kV.Load that ferrite can bear tens of kilowatts of high frequency powers and temperature is no more than 40 degree, can satisfy the physical modulated Shu Genggao requirement in one step.
The present invention becomes first synchrotron of China loading and frequency conversion tuning cavity of large power ferrite body by The CAS Institute of Modern Physics design and by nearly thing institute with Shaanxi digital broadcasting communication apparatus Co., Ltd joint research and development, is mainly used in CSR experimental ring halved tie stream and accumulates and slow down.It can produce the synchrotron cavity of higher continuous wave high frequency voltage, to satisfy the job requirement of CSR experimental ring, the CSR experimental ring requires high frequency resonate cavity not only to want can be operated under the scanning frequency pulse pattern, but also want to be operated under the higher electricity frequency continuous wave mode of cavity voltage, at this moment cavity wants to bear the high frequency power of the most about 60～70kW, loads ferritic temperature limitation simultaneously below 40 degree.
Description of drawings:
Fig. 1 is a structural front view of the present invention;
Fig. 2 is the A-A cross-sectional view among Fig. 1 of the present invention;
Fig. 3 is the B-B cross-sectional view among Fig. 1 of the present invention;
Fig. 4 be CSR experimental ring radio frequency system the two-pattern test result
(a) be f=0.5MHz, cavity voltage V=17kV;
(b) be f=1MHz, cavity voltage V=14.2kV;
Fig. 5 is some continuous wave operation frequently pattern cavity voltage tester result:
(a) be f=1.5MHz, cavity voltage V=11.4kV;
(b) be f=2MHz cavity voltage V=9.26kV;
Fig. 6 is scanning frequency pulse modulation operational mode cavity voltage tester result.
Among the figure, 1 is the detection of cavity voltage sampling; 2 is the cavity voltage sampling; 3 are the off resonance phase place
Embodiment:
Be described in further detail below in conjunction with the most preferred embodiment shown in the accompanying drawing:
See Fig. 1,2,3, described loading and frequency conversion tuning cavity of large power ferrite, include coaxial left resonant cavity 1 staggered relatively and right resonant cavity 2, its characteristics are: be filled with the ferrite bead 6 that the multi-disc cavity loads between the inner wire 15 of described right resonant cavity 2 and the outer conductor 16, be filled with insulation tetrafluoro medium 8 between the internal diameter of ferrite bead 6 and the inner wire 15, be provided with the first magnetic bias coil-conductor 9 in the insulation tetrafluoro medium 8, the outside of ferrite bead 6 is equipped with the second magnetic bias coil-conductor 10, in the middle of the inner wire 15 of right resonant cavity 2 is vacuum chamber 3, stainless steel casing 23 is equipped with in the outside of right resonant cavity 2, and the sidepiece of right resonant cavity 2 is provided with and supports corrosion resistant plate 17.
Described ferrite core 6 is 20, be provided with water flowing cooler pan 7 between per two ferrite beads 6, water flowing cooler pan 7 links to each other with outside feed pipe by water inlet pipe and water outlet pipe joint 21, and ferrite bead 6 and water flowing cooler pan 7 are installed on the resonant cavity by the supporter 20 of resonant cavity bottom.Described vacuum chamber 3 links to each other by brace 19 with inner wire 15, and the outside of vacuum chamber 3 is provided with heating tape and heat-insulation layer 22.
Described left resonant cavity 1 is identical with right resonant cavity 2 structures, and symmetry connects.Described left resonant cavity 1 and right resonant cavity 2 connections are provided with feed bonding conductor 18 and magnetic bias coil interconnection place 11; vacuum chamber junction in left side resonant cavity 1 and the right resonant cavity 2 is provided with insulating ceramics 4 and accelerating slit 5; insulating ceramics 4 vacuum chamber junctions are provided with bellows 12; protection ceramicto-metal seal position is not fragile; accelerating slit 5 both sides link to each other with the inner wire open end of left resonant cavity 1 and right resonant cavity 2 respectively; accelerating slit 5 both sides link to each other with cavity resonant high voltage vacuum capacitors 14 again, and the two ends of the vacuum chamber in left resonant cavity 1 and the right resonant cavity 2 are equipped with bracing or strutting arrangement 13.
Described loading and frequency conversion tuning cavity of large power ferrite is filled with internal diameter 330mm between the inner wire 15 of its each coaxial resonant cavity and the outer conductor 16, external diameter 600mm, and respectively 20 of the special-purpose ferrite beads 6 of thickness 25mm form the cavity resonant inductance with this.All ferrite beads and aqueous cold plate have supporter 20 to support at cavity bottom, do not stress to guarantee inner wire.Vacuum chamber 3, promptly the particle beam pipeline places coaxial inner conductor, on a left side, adds the balance high frequency power by feed bonding conductor (18) between the right two resonant cavity cavitys, and this voltage is exactly the accelerating voltage of particle.Ferritic effect has two, one, shortens cavity length, and the 2nd, DC magnetic bias current changes ferritic permeability, thereby changes the resonance frequency of cavity.For this reason, be provided with bias current coil-conductor 9 in the medium between cavity inner wire and magnet ring, coil-conductor is wide 40mm, and the copper coin of thickness 4mm, coil be totally six circles.Corresponding 0.5MHz～2MHz operating frequency, the DC magnetic bias current that flows through coil is about 5～140A.Intersect with the middle part of copper coin at two cavitys, purpose is that the high-frequency current that two cavitys are responded on coil is cancelled out each other, and has only DC magnetic bias current on the coil.
Described loading and frequency conversion tuning cavity of large power ferrite, ferrite and medium in the cavity are in the strong electromagnetic field of high frequency, because magnetic loss and dielectric loss, the absorbing high-frequency energy and generate heat, endergonic size, i.e. the size of loss is relevant with ferritic performance with dielectric material.For cavity can be operated under the high power high voltage, the present invention is in order to reduce dielectric loss, and the dielectric between ferrite core and the inner wire adopts the little polytetrafluoroethylene of high-frequency loss, and solves its filling molding difficult problem.Before ferrite core is installed, with mould with the tetrafluoro extrusion modling on coaxial inner conductor, and the magnetic bias coil-conductor is embedded in the middle of the tetrafluoro layer simultaneously, make the tetrafluoro medium, the copper conductor bar, coaxial inner conductor becomes the one of combining closely and can Precision Machining. and like this, cavity just can be dismantled repeatedly, convenient for maintaining and test; For the heat that ferrite is produced is taken away, in accompanying between the both sides of every ferrite core and two adjacent ferrite cores, external diameter is identical with ferrite core, certain thickness water flowing cooler pan, the heat that ferrite produces is transmitted on the aqueous cold plate, is taken away by the current in the dish; The cavity tuning capacity is selected for use high withstand voltage, high power vacuum ceramic electric capacity, and cool off with blower fan.
Adopt above design and structure, in 0.5MHz～2MHZ frequency range, cavity not only can be worked under the scanning frequency pulse modulating mode, but also can under a frequency continuous wave mode, work, peak is pressed can reach peak-to-peak value 17kV, satisfied CSR experimental ring radio frequency system double mode job requirement, test result is seen Fig. 4.
Fig. 4 (a) is f=0.5MHz, cavity voltage V=17kV; Fig. 4 (b) is f=1MHz, cavity voltage V=14.2kV.
Fig. 5 is some continuous wave operation frequently pattern cavity voltage tester result:
Fig. 5 (a) is f=1.5MHz, cavity voltage V=11.4kV; Fig. 5 (b) is f=2MHz cavity voltage V=9.26kV.
Fig. 6 is scanning frequency pulse modulation operational mode cavity voltage tester result.Among the figure, 1 is the detection of cavity voltage sampling; 2 is the cavity voltage sampling; 3 are the off resonance phase place.
Figure below is some continuous wave operation frequently pattern cavity voltage tester result:
F=1.5MHz cavity voltage V=11.4kV f=2MHz cavity voltage V=9.26kV
Figure below is scanning frequency pulse modulation operational mode cavity voltage tester result: (among the figure, 1 is the detection of cavity voltage sampling; 2 is the cavity voltage sampling; 3 are the off resonance phase place)
Claims (5)
1. loading and frequency conversion tuning cavity of large power ferrite, include coaxial left resonant cavity (1) staggered relatively and right resonant cavity (2), it is characterized in that: be filled with the ferrite bead (6) that the multi-disc cavity loads between the inner wire (15) of described right resonant cavity (2) and the outer conductor (16), be filled with insulation tetrafluoro medium (8) between the internal diameter of ferrite bead (6) and the inner wire (15), be provided with the first magnetic bias coil-conductor (9) in the insulation tetrafluoro medium (8), the outside of ferrite bead (6) is equipped with the second magnetic bias coil-conductor (10), in the middle of the inner wire (15) of right resonant cavity (2) is vacuum chamber (3), stainless steel casing (23) is equipped with in the outside of right resonant cavity (2), and the sidepiece of right resonant cavity (2) is provided with and supports corrosion resistant plate (17).
2. loading and frequency conversion tuning cavity of large power ferrite as claimed in claim 1, it is characterized in that: described ferrite core (6) is 20, be provided with water flowing cooler pan (7) between per two ferrite beads (6), water flowing cooler pan (7) links to each other with outside feed pipe by water inlet pipe and water outlet pipe joint (21), and ferrite bead (6) and water flowing cooler pan (7) are installed on the resonant cavity by the supporter (20) of resonant cavity bottom.
3. loading and frequency conversion tuning cavity of large power ferrite as claimed in claim 1 is characterized in that: described vacuum chamber (3) links to each other by brace (19) with inner wire (15), and the outside of vacuum chamber (3) is provided with heating tape and heat-insulation layer (22).
4. loading and frequency conversion tuning cavity of large power ferrite as claimed in claim 1 is characterized in that: described left resonant cavity (1) is identical with right resonant cavity (2) structure, and symmetry connects.
5. loading and frequency conversion tuning cavity of large power ferrite as claimed in claim 4, it is characterized in that: described left resonant cavity (1) and right resonant cavity (2) connection are provided with feed bonding conductor (18) and magnetic bias coil interconnection place (11), vacuum chamber junction in left side resonant cavity (1) and the right resonant cavity (2) is provided with insulating ceramics (4) and accelerating slit (5), insulating ceramics (4) vacuum chamber junction is provided with bellows (12), accelerating slit (5) both sides link to each other with the inner wire open end of left resonant cavity (1) with right resonant cavity (2) respectively, accelerating slit (5) both sides link to each other with cavity resonant high voltage vacuum capacitors (14) again, and the two ends of the vacuum chamber in left resonant cavity (1) and the right resonant cavity (2) are equipped with bracing or strutting arrangement (13).
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200910165484 CN101715272A (en) | 2009-08-13 | 2009-08-13 | Loading and frequency conversion tuning cavity of large power ferrite |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102711357A (en) * | 2011-12-10 | 2012-10-03 | 中国科学院近代物理研究所 | Variable frequency tuning cavity |
| CN105226350A (en) * | 2015-08-25 | 2016-01-06 | 西安电子工程研究所 | A kind of coaxial High-Power Microwave generator based on nonlinear transmission line |
| CN106455287A (en) * | 2016-07-29 | 2017-02-22 | 中国原子能科学研究院 | Imbalanced dual-inner-rod spiral high-frequency resonant cavity of superconductive cyclotron |
| US9775228B2 (en) | 2013-05-17 | 2017-09-26 | Ion Beam Applications S.A. | Electron accelerator having a coaxial cavity |
| CN109936907A (en) * | 2019-04-18 | 2019-06-25 | 东莞中子科学中心 | A kind of water-cooling structure of high power magnetic alloy cavity |
| CN110035597A (en) * | 2019-04-30 | 2019-07-19 | 中国科学院近代物理研究所 | A kind of frequency conversion nonresonant cavity configuration |
| CN112886158A (en) * | 2020-11-16 | 2021-06-01 | 中国科学院合肥物质科学研究院 | High-power coaxial ceramic window cooling device |
| CN113064109A (en) * | 2021-03-24 | 2021-07-02 | 中国科学院近代物理研究所 | Ferrite high-frequency loading cavity bias curve testing device and method |
| CN115226285A (en) * | 2022-08-24 | 2022-10-21 | 迈胜医疗设备有限公司 | Rotating capacitor for synchrocyclotron |
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2009
- 2009-08-13 CN CN 200910165484 patent/CN101715272A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102711357B (en) * | 2011-12-10 | 2015-05-20 | 中国科学院近代物理研究所 | Variable frequency tuning cavity |
| CN102711357A (en) * | 2011-12-10 | 2012-10-03 | 中国科学院近代物理研究所 | Variable frequency tuning cavity |
| US9775228B2 (en) | 2013-05-17 | 2017-09-26 | Ion Beam Applications S.A. | Electron accelerator having a coaxial cavity |
| CN105226350A (en) * | 2015-08-25 | 2016-01-06 | 西安电子工程研究所 | A kind of coaxial High-Power Microwave generator based on nonlinear transmission line |
| CN106455287A (en) * | 2016-07-29 | 2017-02-22 | 中国原子能科学研究院 | Imbalanced dual-inner-rod spiral high-frequency resonant cavity of superconductive cyclotron |
| CN109936907B (en) * | 2019-04-18 | 2023-11-14 | 东莞中子科学中心 | Water cooling structure of high-power magnetic alloy cavity |
| CN109936907A (en) * | 2019-04-18 | 2019-06-25 | 东莞中子科学中心 | A kind of water-cooling structure of high power magnetic alloy cavity |
| CN110035597A (en) * | 2019-04-30 | 2019-07-19 | 中国科学院近代物理研究所 | A kind of frequency conversion nonresonant cavity configuration |
| CN110035597B (en) * | 2019-04-30 | 2021-11-02 | 中国科学院近代物理研究所 | Frequency conversion non-tuning cavity structure |
| CN112886158A (en) * | 2020-11-16 | 2021-06-01 | 中国科学院合肥物质科学研究院 | High-power coaxial ceramic window cooling device |
| CN113064109A (en) * | 2021-03-24 | 2021-07-02 | 中国科学院近代物理研究所 | Ferrite high-frequency loading cavity bias curve testing device and method |
| CN113064109B (en) * | 2021-03-24 | 2024-02-02 | 中国科学院近代物理研究所 | Ferrite high-frequency loading cavity bias magnetic curve testing device and method |
| CN115226285A (en) * | 2022-08-24 | 2022-10-21 | 迈胜医疗设备有限公司 | Rotating capacitor for synchrocyclotron |
| CN115226285B (en) * | 2022-08-24 | 2024-01-26 | 迈胜医疗设备有限公司 | Rotary capacitor for synchrocyclotron |
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Open date: 20100526 |