CN104470191A - Mixed ion acceleration device - Google Patents
Mixed ion acceleration device Download PDFInfo
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- CN104470191A CN104470191A CN201410772795.8A CN201410772795A CN104470191A CN 104470191 A CN104470191 A CN 104470191A CN 201410772795 A CN201410772795 A CN 201410772795A CN 104470191 A CN104470191 A CN 104470191A
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Abstract
The invention relates to the technical field of ion acceleration equipment, in particular to a mixed ion acceleration device. The device comprises a cavity, a radio frequency quadrupole field and a drift tube are arranged on the same center line in the cavity, a foundation plate is correspondingly arranged on the joint of the radio frequency quadrupole field and the drift tube, two T-shaped plates are symmetrically arranged in the cavity in an up-down mode, the two ends of the cavity are provided with end plates, the radio frequency quadrupole field comprises two bar type electrodes, the two adjacent bar type electrodes are installed on the T-shaped plates through an electrode support and an electrode support supporting rod, and electrode supporting contact parts are arranged between the electrode support and the bar type electrodes. The drift tube is of a multi-segment structure, each segment of drift tube is installed on the corresponding T-shaped plate through a drift tube supporting rod, the gap between every two adjacent drift tubes is of an interactive phase bunching structure, and the drift tube supporting rods are designed in an interdigitated H type. By means of the device, a lot of space and cost are saved, and the device is more economical and practical and has high transmission efficiency, high gradient acceleration ability and high power acceleration efficiency.
Description
Technical field
The present invention relates to a kind of ion acceleration equipment technical field, especially relate to a kind of mixed type ion accelerator.
Background technology
Radio frequency four polar field (RFQ) accelerator is proposed by Soviet scientists for 1969, and 1984 successful and well-known by American scientist acceleration big current, popularized.RFQ has the electrode of four, two groups symmetries.The electrode of often organizing of RFQ has identical electromotive force and voltage, and the electromotive force of two groups and voltage are just in time contrary.This just makes RFQ while accelerated particle (two arrays of electrodes acting in conjunction), also can play the effect (singly organizing electrode) of pack to particle.But the electric power acceleration efficiency of RFQ accelerating structure is very low, and because the cavity frequency limitation of RFQ, RFQ is made to have considerable restraint in use.
Drift tube (DT) type accelerator was born from 1932, just become the normal temperature accelerator structure of at present most main flow.Its acceleration principle is that the charged particle injected passes through the drift tube gap designed, and drift tube gap is just in time positive electric field, and therefore charged particle can be accelerated on field direction; Through half high frequency period, when the electric field in drift tube gap becomes negative electric field, particle just in time enters drift tube inside, because electromagnetic shielding effect, so charged particle can not be experienced negative electric field and be decelerated; Enter next drift tube gap through lower half high frequency period equally, in drift tube gap, electric field becomes positive electric field again, and therefore charged particle is acceleration tendency in total.Interdigital H type accelerating structure has very high electric power acceleration efficiency, but because of space charge effect, line is easily spread low light velocity field (when particle rapidity is lower), and line halation is larger.
Summary of the invention
The object of the invention is to the defect for prior art and a kind of mixed type ion accelerator is provided, it is by being merged into radio frequency four polar field and drift tube two kinds of accelerating structures in the acceleration cavity of an interdigital H type, there is the high-transmission efficiency of radio frequency four polar field, the high gradient acceleration capacity of drift tube structure simultaneously, and the high power acceleration efficiency of interdigital H type accelerator, thus solve the problem of prior art.
For achieving the above object, the technical scheme that the present invention takes is: described a kind of mixed type ion accelerator, be characterized in comprising cavity, in described cavity, same center line arranges radio frequency four polar field section and drift pipeline section two parts, the joint correspondence of radio frequency four polar field section and drift pipeline section is provided with grade slab, be symmetrically arranged with two T-shaped plates in described cavity up and down, cavity two ends are provided with end plate; Described radio frequency four polar field section comprises two groups of radio frequency four polar field rod-type electrodes, radio frequency four polar field rod-type electrode is arranged on T-shaped plate by radio frequency four polar field electrode suppor and radio frequency four polar field electrode suppor support bar, is provided with electrode supporting contact component between radio frequency four polar field electrode suppor and radio frequency four polar field rod-type electrode; Described drift pipeline section is multiple drift tube electric pole type structures, each drift tube electrode is arranged on T-shaped plate respectively by drift tube support bar, gap between adjacent drift pipe electrode is mutual phase place pack frame mode, and drift tube support bar is the design of interdigital H type.
Described grade slab, radio frequency four polar field rod-type electrode and drift tube electrode are that concentricity line is arranged, grade slab and radio frequency four polar field rod-type electrode and drift tube electrode adjacent are provided with gap, grade slab is arranged on chamber outer wall by grade slab support bar, and grade slab support bar and radio frequency four polar field electrode suppor support bar and drift tube support bar are vertical setting.
Two radio frequency four polar field rod-type electrode suppors adjacent in described radio frequency four polar field section are fixedly connected with horizontal direction rod-type electrode and vertical direction rod-type electrode respectively by electrode supporting contact component.
Described radio frequency four polar field electrode suppor support bar and the number of drift tube support bar are determined according to cavity degree and power calculation, and adjacent radio frequency four polar field electrode suppor support bar and drift tube support bar are interdigital H type structure.
Described radio frequency four polar field rod-type electrode is when cavity does continuous wave operation or do high duty ratio operation, or by heating calculate run time the thermal deformation that causes because of feed-in power can cause cavity frequency detuning time, radio frequency four polar field rod-type electrode interior arranges cooling circuit, cooling circuit is linear structure, and the cooling circuit of radio frequency four polar field rod-type electrode is connected as a single entity by electrode supporting contact component and T-shaped plate and whole cooling system.
Described grade slab is circular electrode, when cavity does continuous wave operation or do high duty ratio operation, or by heating calculate run time the thermal deformation that causes because of feed-in power can cause cavity frequency detuning time, grade slab indoor design cooling circuit, cooling circuit is for emptying water route welded seal design again, and cooling circuit is connected as a single entity by grade slab support bar and whole cooling system.
Described drift tube electrode is circular electrode, when cavity does continuous wave operation or do high duty ratio operation, or by heating calculate run time the thermal deformation that causes because of feed-in power can cause cavity frequency detuning time, drift tube indoor design cooling circuit, cooling circuit is for emptying water route welded seal design again, and cooling circuit is connected as a single entity by drift tube electrode supporting bar and T-shaped plate and whole cooling system.
The beam focusing mode of drift pipeline section is mutual phase place pack mode.If according to calculating, when mutual phase focusing mode can not meet beam bunching, halved tie stream can be carried out by the mode arranging permanent magnet in drift tube inside and carry out pack.
Be provided with cooling circuit in described radio frequency four polar field electrode suppor support bar, drift tube support bar and grade slab support bar, cooling circuit is for emptying the design of support bar central part, and cooling circuit is connected as a single entity by the cooling circuit of chamber outer wall and whole system.
Described cavity is vacuum chamber cylinder, and its vacuum degree is 10
-4-10
-7pa.
A kind ofly adopt described mixed type ion accelerator for heavy particle treatment of cancer, be characterized in adopting laser ion source at described cavity, mixed type ion accelerator and the acceleration cavity in existing track deflecting magnet, synchronous ring and the deflecting magnet in synchronous ring are formed together with synchronous ring-like accelerator jointly as heavy particle treatment of cancer facility, there is facility simpler, beam intensity is stronger, the advantage that cost is lower.
Beneficial effect of the present invention: described a kind of mixed type ion accelerator, the great drift tube playing RFQ is to the acceleration of line and bunching effect, and the power making whole cavity consumption little because adopting hybrid architecture just can beam acceleration to higher energy.Present invention saves large quantity space and cost, and more tight end Ji, more practical.It has high-transmission efficiency, high gradient acceleration capacity, high electric power acceleration efficiency.Be mainly used for the applied accelerator such as the acceleration of high current low energy ion line and the injector of high-current accelerator.It accelerates stronger line, beam acceleration is made it to have better halo effect to higher energy in shorter distance.When described cavity as heavy particle treatment of cancer facility injector use time, stripping film system that is existing, that line significant losses can be caused and cause halation greatly to spread can be saved, also the existing and multi-turn injection system of complexity can be saved, therefore the size of electromagnet all in the beam aperture of synchronous ring and synchronous ring can be reduced greatly, and then project cost and the duration of whole heavy particle treatment of cancer facility can be reduced greatly, promote the well-being of mankind society.
Accompanying drawing illustrates:
Fig. 1 structural principle schematic diagram of the present invention;
A place structure enlarged diagram in Fig. 2 Fig. 1 of the present invention;
Fig. 3 the present invention is used for heavy particle treatment of cancer principle schematic;
Fig. 4 the present invention is used for the treatment of head part's tumour schematic diagram.
Shown in figure: 1. cavity, 2. radio frequency four polar field section, 3. drift about pipeline section, 4. grade slab, 5.T shape plate, 6. end plate, 7. radio frequency four polar field rod-type electrode, 7-1: horizontal direction rod-type electrode, 7-2: vertical direction rod-type electrode, 8. radio frequency four polar field electrode suppor, 9. radio frequency four polar field electrode suppor support bar, 10. electrode supporting contact component, 11. drift cast electrodes, 12. drift tube support bars, 13. gaps, 14. grade slab support bars, 15. laser ion sources, 16. synchronous ring-like accelerators, 17. track deflecting magnets, acceleration cavity in 18. synchronous ring, deflecting magnet in 19. synchronous ring, 20. mixed type accelerators, 21. protons, 22. neutron-producing targets, 23. electromagnetic pumps, 24. heat exchangers, 25. neutron generating units, 26. control system, 27. neutrons, 28. treatment radiating systems, 29. tumours, 30. human bodies, 31. health-monitoring installations.
Embodiment
The present invention is described in detail below in conjunction with accompanying drawing.
As illustrated in fig. 1 and 2, described a kind of mixed type ion accelerator, comprise cavity 1, in described cavity, same center line arranges radio frequency four polar field section 2 and drift pipeline section 3 two parts, the joint correspondence of radio frequency four polar field section 2 and drift pipeline section 3 is provided with grade slab 4, be symmetrically arranged with two T-shaped plates 5 in described cavity 1 up and down, cavity 1 two ends are provided with end plate 6; Described radio frequency four polar field section 2 comprises two groups of radio frequency four polar field rod-type electrodes 7, radio frequency four polar field rod-type electrode 7 is arranged on T-shaped plate 5 by radio frequency four polar field electrode suppor 8 and radio frequency four polar field electrode suppor support bar 9, is provided with electrode supporting contact component 10 between radio frequency four polar field electrode suppor 8 and radio frequency four polar field rod-type electrode 7; Described drift pipeline section 3 is multiple drift tube electrode 11 formula structures, and each drift tube electrode 11 is arranged on T-shaped plate 5 respectively by drift tube support bar 12, and the gap 13 between adjacent drift pipe electrode 11 is mutual phase place pack frame mode.
Described grade slab 4, radio frequency four polar field rod-type electrode 7 and drift tube electrode 11 are that concentricity line is arranged, grade slab 4 is provided with gap with radio frequency four polar field rod-type electrode 7 and drift tube electrode 11 adjacent, grade slab 4 is arranged on cavity 1 outer wall by grade slab support bar 14, and grade slab support bar 14 and radio frequency four polar field electrode suppor support bar 9 moved pipe support bar 12 arrange for vertical with floating.
Two radio frequency four polar field rod-type electrode suppors 8 adjacent in described radio frequency four polar field section 2 respectively electrify electrode support contact component 10 are fixedly connected with horizontal direction rod-type electrode 7-1 and vertical direction rod-type electrode 7-2.
Described radio frequency four polar field electrode suppor support bar 9 and the number of drift tube support bar 12 are determined according to cavity degree and power calculation, and adjacent radio frequency four polar field electrode suppor support bar 9 and drift tube support bar 12 are in interdigital H type structure.
Described radio frequency four polar field rod-type electrode 7 is when cavity does continuous wave operation or do high duty ratio operation, or by heating calculate run time the thermal deformation that causes because of feed-in power can cause cavity frequency detuning time, radio frequency four polar field rod-type electrode 7 inside arranges cooling circuit, cooling circuit is linear structure, and the cooling circuit of radio frequency four polar field rod-type electrode 7 is connected as a single entity by electrode supporting contact component and T-shaped plate and whole cooling system.
Described grade slab 4 is circular electrode, when cavity 1 does continuous wave operation or do high duty ratio operation, or by heating calculate run time the thermal deformation that causes because of feed-in power can cause cavity frequency detuning time, grade slab indoor design cooling circuit, cooling circuit is for emptying water route welded seal design again, and cooling circuit is connected as a single entity by grade slab support bar and whole cooling system.
Described drift tube electrode 11 is circular electrode, when cavity 1 does continuous wave operation or do high duty ratio operation, or by heating calculate run time the thermal deformation that causes because of feed-in power can cause cavity frequency detuning time, drift tube indoor design cooling circuit, cooling circuit is for emptying water route welded seal design again, and cooling circuit is connected as a single entity by drift tube electrode supporting bar and T-shaped plate and whole cooling system.
The beam focusing mode of drift pipeline section 3 is mutual phase place pack mode.If according to calculating, when mutual phase focusing mode can not meet beam bunching, halved tie stream can be carried out by the mode arranging permanent magnet in drift tube inside and carry out pack.
Cooling circuit is provided with in described radio frequency four polar field electrode suppor support bar 9, drift tube support bar 12 and grade slab support bar 14, cooling circuit is for emptying the design of support bar central part, and cooling circuit is connected as a single entity by the cooling circuit of chamber outer wall and whole system.
Described cavity 1 is vacuum chamber cylinder, and its vacuum degree is 10
-4-10
-7pa.
As shown in Figure 3, a kind ofly adopt described mixed type ion accelerator for heavy particle treatment of cancer, be characterized in adopting laser ion source 15 at described cavity, mixed type ion accelerator is formed together with synchronous ring-like accelerator 16 as heavy particle treatment of cancer facility with the deflecting magnet 19 in synchronous ring jointly with the acceleration cavity 18 in existing track deflecting magnet 17, synchronous ring, there is facility simpler, beam intensity is stronger, the advantage that cost is lower.Existing synchronous ring-like heavy ion treatment of cancer facility is all accelerate C4+ particle, then after carbon element stripping film is peeled off, multi-turn injection synchronous ring, and then after accelerating C6+ particle to 300 ~ 400MeV (Mega-Electron Voltage) by synchronous ring again radiation human body affected part carry out treatment of cancer.But general ECR (Electron Cyclotron Resonance) ion source can only produce tens of C4+ particle arriving hundreds of microamperes, and the C6+ transfer ratio of more than 95% will expected through carbon element stripping film, must accelerate C4+ particle to 6-8MeV, this just makes injector itself very huge, complicated.Again because the population using the injector of ecr ion source to obtain is far smaller than the population needed for treatment of cancer, complicated multi-turn injection method therefore all must be used to obtain necessary population.And use the new injector of laser ion source and mixed type accelerator, because the C6+ population of a laser plasma injection is far longer than the population needed for treatment of cancer, so the carbon element stripping film very large to beam quality infringement can save with complicated multi-turn injection system.Meanwhile, because eliminate multi-turn injection system, thus the beam aperture of magnet in synchronous ring can do very little, thus significantly reduce the magnet size in synchronous ring, significantly reduce the cost of synchronous ring.The use of mixing lumen type accelerator can simplify injector and synchronous ring itself greatly, and being the important breakthrough of heavy ion treatment of cancer, is the product that accelerator civil nature is expected the most.
As shown in Figure 4, use BNCT (the Boron Neutron Cancer Therapy) schematic diagram of mixed type accelerator, what show in figure is treatment head part tumour schematic diagram.
Mixed type accelerator is used to accelerate the proton of necessary amount to necessary energy, nuclear reaction is there is in proton beam when passing through lithium target, radiate neutron, different with using the BNCT of reactor, the neutron produced by accelerator can just can the tumour affected part of direct irradiation patient without neutron degradation device.Because cancer cell have hobby to Boron unit, cancer cell can be made Boron element is adsorbed by feeding Boron compound to patient in advance, again because the neutron reaction area of Boron element is larger, therefore the neutron of proton target practice generation majority Boron element reaction only and in cancer cell when irradiating human body, and then reach the effect of only killing cancer cell.
The BNCT cure of use mixed type accelerator is the selection of particle size, and accuracy is high, and cancer return rate is minimum.And use mixed type accelerator to reach to reduce investment outlay, save space-efficient object, be very easy to universal, that be rare Worth Expecting, outstanding accelerator civil nature product.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a mixed type ion accelerator, it is characterized in that comprising cavity, in described cavity, same center line arranges radio frequency four polar field section and drift pipeline section two parts, the joint correspondence of radio frequency four polar field section and drift pipeline section is provided with grade slab, be symmetrically arranged with two T-shaped plates in described cavity up and down, cavity two ends are provided with end plate; Described radio frequency four polar field section comprises two groups of radio frequency four polar field rod-type electrodes, radio frequency four polar field rod-type electrode is arranged on T-shaped plate by radio frequency four polar field electrode suppor and radio frequency four polar field electrode suppor support bar, is provided with electrode supporting contact component between radio frequency four polar field electrode suppor and radio frequency four polar field rod-type electrode; Described drift pipeline section is multiple drift tube electric pole type structures, each drift tube electrode is arranged on T-shaped plate respectively by drift tube support bar, gap between adjacent drift pipe electrode is mutual phase place pack frame mode, and drift tube support bar is the design of interdigital H type.
2. a kind of mixed type ion accelerator as claimed in claim 1, it is characterized in that: described grade slab, radio frequency four polar field rod-type electrode and drift tube electrode are that concentricity line is arranged, grade slab and radio frequency four polar field rod-type electrode and drift tube electrode adjacent are provided with gap, grade slab is arranged on chamber outer wall by grade slab support bar, and grade slab support bar and radio frequency four polar field electrode suppor support bar and drift tube support bar are vertical setting.
3. a kind of mixed type ion accelerator as claimed in claim 1, is characterized in that: two radio frequency four polar field rod-type electrode suppors adjacent in described radio frequency four polar field section are fixedly connected with horizontal direction rod-type electrode and vertical direction rod-type electrode respectively by electrode supporting contact component.
4. a kind of mixed type ion accelerator as claimed in claim 1, it is characterized in that: described radio frequency four polar field electrode suppor support bar and the number of drift tube support bar are determined according to cavity degree and power calculation, adjacent radio frequency four polar field electrode suppor support bar and drift tube support bar are interdigital H type structure.
5. a kind of mixed type ion accelerator as claimed in claim 1, it is characterized in that: described radio frequency four polar field rod-type electrode is when cavity does continuous wave operation or do high duty ratio operation, or by heating calculate run time the thermal deformation that causes because of feed-in power can cause cavity frequency detuning time, radio frequency four polar field rod-type electrode interior arranges cooling circuit, cooling circuit is linear structure, and the cooling circuit of radio frequency four polar field rod-type electrode is connected as a single entity by electrode supporting contact component and T-shaped plate and whole cooling system.
6. a kind of mixed type ion accelerator as claimed in claim 1, it is characterized in that: described grade slab is circular electrode, when cavity does continuous wave operation or do high duty ratio operation, or by heating calculate run time the thermal deformation that causes because of feed-in power can cause cavity frequency detuning time, grade slab indoor design cooling circuit, cooling circuit is for emptying water route welded seal design again, and cooling circuit is connected as a single entity by grade slab support bar and whole cooling system.
7. a kind of mixed type ion accelerator as claimed in claim 1, it is characterized in that: described drift tube electrode is circular electrode, when cavity does continuous wave operation or do high duty ratio operation, or by heating calculate run time the thermal deformation that causes because of feed-in power can cause cavity frequency detuning time, drift tube indoor design cooling circuit, cooling circuit is for emptying water route welded seal design again, and cooling circuit is connected as a single entity by drift tube electrode supporting bar and T-shaped plate and whole cooling system.
8. a kind of mixed type ion accelerator as claimed in claim 1, it is characterized in that: the beam focusing mode of described drift pipeline section is mutual phase place pack mode, when according to calculating, when mutual phase focusing mode can not meet beam bunching, carry out halved tie stream by the mode arranging permanent magnet in drift tube inside and carry out pack.
9. a kind of mixed type ion accelerator as claimed in claim 1, it is characterized in that: in described radio frequency four polar field electrode suppor support bar, drift tube support bar and grade slab support bar, be provided with cooling circuit, cooling circuit is for emptying the design of support bar central part, and cooling circuit is connected as a single entity by the cooling circuit of chamber outer wall and whole system; Described cavity is vacuum chamber cylinder, and its vacuum degree is 10
-4-10
-7pa.
10. one kind adopts a kind of mixed type ion accelerator according to claim 1 to be used for heavy particle treatment of cancer, it is characterized in that adopting laser ion source at described cavity, mixed type ion accelerator and the acceleration cavity in existing track deflecting magnet, synchronous ring and the deflecting magnet in synchronous ring are formed together with synchronous ring-like accelerator jointly as heavy particle treatment of cancer facility.
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| CN105072798A (en) * | 2015-09-16 | 2015-11-18 | 中国工程物理研究院流体物理研究所 | Direct injection type ion beam accelerator |
| CN105120590A (en) * | 2015-09-11 | 2015-12-02 | 北京大学 | Medical radio isotope production system |
| CN107896415A (en) * | 2017-10-17 | 2018-04-10 | 中国科学院近代物理研究所 | Compact high frequency electrofocusing mixes accelerating cavity |
| CN109406549A (en) * | 2018-12-12 | 2019-03-01 | 北京中百源国际科技创新研究有限公司 | A kind of vehicle-mounted removable safety inspection device |
| CN112867221A (en) * | 2020-12-30 | 2021-05-28 | 中国原子能科学研究院 | Acceleration structure and linear accelerator with same |
| CN113163569A (en) * | 2021-04-21 | 2021-07-23 | 散裂中子源科学中心 | Method for inhibiting RFQ frequency drift |
| CN114599144A (en) * | 2018-05-18 | 2022-06-07 | 万睿视影像有限公司 | Configurable linear accelerator frequency control system and method |
| CN114867184A (en) * | 2022-06-15 | 2022-08-05 | 中国科学院近代物理研究所 | Compact multi-ion accelerator treatment device and application thereof |
| CN115607858A (en) * | 2022-09-09 | 2023-01-17 | 中国科学院近代物理研究所 | Cross rod type radio frequency quadrupole accelerator device |
| CN116156730A (en) * | 2023-01-09 | 2023-05-23 | 中国科学院近代物理研究所 | Structure of axial injector for cyclotron |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114599144A (en) * | 2018-05-18 | 2022-06-07 | 万睿视影像有限公司 | Configurable linear accelerator frequency control system and method |
| CN114599144B (en) * | 2018-05-18 | 2023-06-13 | 万睿视影像有限公司 | Configurable linac frequency control system and method |
| CN109406549A (en) * | 2018-12-12 | 2019-03-01 | 北京中百源国际科技创新研究有限公司 | A kind of vehicle-mounted removable safety inspection device |
| CN112867221A (en) * | 2020-12-30 | 2021-05-28 | 中国原子能科学研究院 | Acceleration structure and linear accelerator with same |
| CN113163569A (en) * | 2021-04-21 | 2021-07-23 | 散裂中子源科学中心 | Method for inhibiting RFQ frequency drift |
| CN114867184A (en) * | 2022-06-15 | 2022-08-05 | 中国科学院近代物理研究所 | Compact multi-ion accelerator treatment device and application thereof |
| CN114867184B (en) * | 2022-06-15 | 2023-03-14 | 中国科学院近代物理研究所 | Compact multi-ion accelerator treatment device and application thereof |
| CN115607858A (en) * | 2022-09-09 | 2023-01-17 | 中国科学院近代物理研究所 | Cross rod type radio frequency quadrupole accelerator device |
| CN115607858B (en) * | 2022-09-09 | 2023-11-21 | 中国科学院近代物理研究所 | Cross rod type radio frequency quadrupole accelerator device |
| CN116156730A (en) * | 2023-01-09 | 2023-05-23 | 中国科学院近代物理研究所 | Structure of axial injector for cyclotron |
| CN116156730B (en) * | 2023-01-09 | 2023-11-21 | 中国科学院近代物理研究所 | Structure of axial injector for cyclotron |
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