CN115734451A - Direct excitation extraction system utilizing charge state change - Google Patents
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Abstract
The invention belongs to the technical field of synchrotron, and relates to a direct excitation extraction system utilizing charge state change, which comprises: dipolar iron, quadrupole iron, high-speed accelerating cavity and film; the number of the dipolar irons is a plurality, the dipolar irons form a circulating track, and the particle beams move in the circulating track; the two dipolar irons are directly provided with at least one quadrupole iron which is used for adjusting the position of a working point to enable the working point to be close to a resonance line; the high-speed acceleration cavity is used for accelerating particle beams and is arranged between the two dipolar irons; the film is arranged in a certain diode iron or on a circulating orbit and is used for changing the separation height of the particle beam, so that the particles with changed charge states are led out from the first channel or the second channel. The problems of high design difficulty of the extraction system, more types and numbers of elements and complex operation mode are solved, the perimeter of the synchrotron can be greatly shortened, the occupied area is reduced, the system cost is reduced and the like.
Description
Technical Field
The invention relates to a direct excitation leading-out system utilizing charge state change, and belongs to the technical field of synchrotrons.
Background
The synchrotron slow-extraction beam flow is widely applied in the fields of spaceflight, materials, medicine, agriculture, biology and the like. For example, the research on the single-particle effect irradiation of aerospace electronic components, particularly electronic component complete machines is developed; researching the irradiation effect rule of the particles in organisms and semiconductor materials; can be used in the fields of nucleopore membrane production and particle cancer treatment, and has great significance in promoting the development of the related fields of China's social economy.
At present, a slow extraction method commonly used for a synchrotron in the world is nonlinear hexapole field excitation resonance slow vibration extraction, which mainly comprises three processes: 1) And adjusting the horizontal working point to be near an integer of 1/3 on a synchronous accelerator leading-out platform, starting hexapole iron to lead in a hexapole field, and dividing a phase space into a stable region and an unstable region. 2) Changing the moving working point of the quadrupole iron strength to be further close to the resonance line, or increasing the intensity of the hexapole iron and the like to reduce the area of the stable region so that the particles enter the unstable region; or keeping the area of the stable region unchanged, and heating the particles in the stable region through a transverse excitation electric field to gradually increase the transverse oscillation amplitude of the particles so as to overflow to the unstable region. 3) Particles entering the unstable region move along the lead-out boundary rail, enter the electrostatic deflection plate, are deflected by electric field force to realize rail pre-separation, are transmitted to the cutting iron, and are completely led out from the synchrotron by magnetic field deflection force.
The nonlinear hexapole field excited resonance slow extraction has the following problems: 1) The design difficulty of the leading-out system is high, and the types and the number of related elements are large. The position of the hexapole iron element needs to meet the strict phase shift requirement on the optical design, and the chromaticity correction and the independent adjustment of the resonant driving can be realized. Meanwhile, the angle and the pitch of the beam led out from the inlet of the electrostatic deflection plate can be controlled by selecting the reasonable intensity of hexapole iron, and the phase shift between the electrostatic deflection plate and the cutting iron needs to meet the requirement of being close to pi/2 +2n pi (n is an integer). The leading-out system relates to a chromaticity, resonant hexapole iron and magnetic elements of cutting iron, and relates to electrostatic deflection plate high-voltage electric elements with a large number of types. 2) The operation mode of the leading-out stage and the beam current control are complex. The working point of the leading-out platform is adjusted to be close to the resonance line, a nonlinear field is introduced to excite resonance, and beam leading-out can be realized by adjusting the parameters of machine elements or externally adding excitation. 3) The occupied space of the elements is large, the perimeter and the occupied area of the synchrotron are increased, the manufacturing cost is high, and the popularization and the application of the synchrotron device are not facilitated.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a direct excitation extraction system using charge state change, which solves the problems of difficult design, large types and numbers of components, and complex operation mode of the extraction system, and can greatly shorten the perimeter of the synchrotron, reduce the occupied area, and reduce the cost of the system.
In order to achieve the purpose, the invention provides the following technical scheme: a direct excitation extraction system using charge state change, comprising: dipolar iron, quadrupole iron, a high-speed acceleration cavity and a thin film; the number of the dipolar irons is a plurality, the dipolar irons form a circulating track, and the particle beams move in the circulating track; the two dipolar irons are directly provided with at least one quadrupole iron which is used for adjusting the position of a working point to enable the working point to be close to a resonance line; the high-speed acceleration cavity is used for accelerating particle beams and is arranged between the two dipolar irons; the film is arranged in a certain diode iron or on a circulating orbit and is used for changing the separation height of the particle beam, so that the particles with changed charge states are led out from the first channel or the second channel.
Further, the leading-out system also comprises a convex rail magnet, and at least one convex rail magnet is arranged between the dipolar iron corresponding to the film and the dipolar iron at the upstream and downstream in the circulating direction.
Further, the dipolar iron corresponding to the film is: if the film is arranged on a certain diode iron, the diode iron is the diode iron corresponding to the film, and if the film is arranged on the circulating track, the diode iron closest to the film is the diode iron corresponding to the film.
Furthermore, the resonance leading-out system also comprises a transverse excitation device and a direct current intensity detector, wherein the transverse excitation device and the direct current intensity detector are both arranged on the circulating track, and the transverse excitation device is used for transversely exciting the resonance particles to increase the transverse oscillation amplitude of the resonance particles; and the direct current intensity detector is used for monitoring the direct current intensity of the particle beam.
Further, when the film is disposed in a certain diode iron, the conditions under which the particles resonate to increase the amplitude of the circulating beam are:
f k ＝(N±q x )f rev
wherein f is k Is the frequency of the transverse excitation, N is an arbitrary integer, q x Is the fractional part of the operating point, f rev Is the cyclotron frequency of the circulating beam.
Further, the charge state of the circulating particle beam is increased after the circulating particle beam passes through the film, the deflection radius of the particle beam in the dipolar iron after the charge state is changed is smaller than that of the particle beam before the change, the particle beam after the change moves to a track with a small deflection radius, and the particle beams before and after the charge state is changed with different separation heights are obtained at the outlet of the dipolar iron by adjusting the distance between the film material and the end face of the dipolar iron.
Further, when the film is arranged on the convex track, if the charge state change is large after the circulating particle beam passes through the film, the particles with the changed charge state are subjected to kicking angle action when passing through a downstream convex track magnet, generate a large separation height with the circulating particle beam, and are led out through the first channel; if the charge state change of the circulating particle beam after passing through the film is small, the separation height is small after passing through the downstream convex rail magnet, so that the circulating particle beam is transmitted to the downstream dipolar iron to generate enough separation height and is extracted through the second channel.
Further, the width direction x of the film is changed from the horizontal emittance ε x 、β x Function, dispersion function D x Determined by the momentum spread of the beam, Δ p/p x Function and dispersion function D x Is one of the basic optical parameters of the synchrotron, and the calculation formula of the width direction x is as follows: x = sqrt (β) x *ε x )+D x * Δ p/p; the height direction y of the film is determined by the vertical emittance and beta y Function determination, β y The function is one of the basic parameters of the synchrotron optics, and the calculation formula of the height direction y is as follows: y = sqrt (β ∈), where sqrt () is a square root function.
Further, the thin film is a carbon film or a light organic film with a low atomic number.
Further, the first channel and the second channel comprise an electrostatic deflection plate, a horizontal cutting iron, a vertical cutting iron or a vacuum pipeline, and the extracted particle beams are extracted from the horizontal direction or the vertical direction of the synchrotron and transmitted to the terminal.
Due to the adoption of the technical scheme, the invention has the following advantages:
1. the extraction system is simple in design, the types and the number of elements are greatly reduced, the extraction method has no strict requirement on the optical design of the extraction platform of the synchrotron, a nonlinear hexapole magnetic field does not need to be additionally introduced, the special phase shift relation during independent adjustment of resonance driving and chromaticity correction does not need to be considered in the design, the design scheme of the extraction system is simplified, and the types and the number of the extraction elements are greatly reduced. The pre-separation height of the extraction channel can be adjusted to reduce the length and strength of elements in the extraction channel, so that slow extraction of high-energy beam is easier to realize.
2. The invention has simple operation in the leading-out mode, continuously adjustable leading-out time in a large range, and the leading-out platform of the invention can keep optics unchanged all the time in a single operation period without adjusting the working point. The working mode of the hexapole iron is not considered, and only the transverse excitation electric field direct excitation parameters and the working mode of the convex rail need to be considered. By controlling the transverse excitation amplitude and the rise time of the convex track, the slow-extraction beam current with continuously adjustable millisecond magnitude to second magnitude can be obtained, so that the requirements of the experimental terminal on different times of the beam current in a single period are met, and the method has a wide application prospect.
3. The synchrotron has the advantages of compactness, low manufacturing cost, contribution to popularization and application of the device, limitation of double factors of occupied area and manufacturing cost on the popularization of the synchrotron, few types and quantity of elements, small required space, capability of obviously reducing the perimeter and the occupied area of the synchrotron, reduction of the manufacturing cost of the device, and contribution to the popularization and application of the synchrotron device in the fields of cancer treatment, material irradiation, aerospace research and the like.
Drawings
FIG. 1 is a layout of a synchrotron with thin-film materials placed inside a dipole according to an embodiment of the present invention;
FIG. 2 is a diagram of an extracted beam trajectory with thin film material placed within a ferrous pole in accordance with an embodiment of the present invention;
FIG. 3 is a layout diagram of a synchrotron with thin-film material disposed in linear segments according to another embodiment of the present invention;
fig. 4 is a diagram of an extracted beam trajectory with thin film material placed on straight segments in another embodiment of the present invention.
Wherein, D: dipolar iron; q: four-pole iron; RF: a high-frequency acceleration cavity; DCCT: a direct current intensity detector; and (4) BPe: a convex rail magnet; t-cocker is a transverse excitation device; 1 is a first channel; and 2 is a second channel.
Detailed Description
The present invention is described in detail with reference to specific embodiments for better understanding of the technical solutions of the present invention. It should be understood, however, that the detailed description is provided for a better understanding of the invention only and that they should not be taken as limiting the invention. In describing the present invention, it is to be understood that the terminology used is for the purpose of description only and is not intended to be indicative or implied of relative importance.
In order to solve the problem that the angle and the pitch of the outgoing beam at the inlet of the electrostatic deflection plate can be controlled only by selecting the reasonable hexapole iron strength in the prior art, the phase shift between the electrostatic deflection plate and the cutting iron needs to meet the requirement of being close to pi/2 + n.2 pi (n is an integer). The leading-out system relates to the magnetic elements of chromaticity, resonant hexapole iron and cutting iron, and relates to the problem of large variety and quantity of high-voltage electric elements of an electrostatic deflection plate. The invention provides a direct excitation leading-out system utilizing charge state change, wherein a thin film material (such as a carbon film) capable of changing the charge state is placed in a synchrotron, a transverse excitation electric field is adopted to directly excite a circulating beam, and the circulating beam is raised in a local convex rail or other convex rail mode and penetrates through the thin film material to generate the charge state change. The particles before and after the change of the charge state generate movement orbit separation due to different deflection radiuses in the dipolar field, and the particles with the changed charge state enter the extraction channel and are extracted from the synchrotron. By controlling the strength of the transverse excitation electric field and the rising time of the convex track, a large-range continuously adjustable slow-extraction beam in the millisecond-second order can be provided. The scheme of the invention breaks through the traditional slow extraction method by utilizing nonlinear hexapole field to excite resonance, has the outstanding advantages of simple operation, less types and quantity of extraction elements, small occupied space and high cost performance, greatly shortens the perimeter of the synchrotron, and has important influence on the fields of cancer treatment based on the proton and heavy particle synchrotron, biological and material irradiation, aerospace, industrial irradiation and the like. The present invention will be described in detail below by way of examples with reference to the accompanying drawings.
Example one
The present embodiment discloses a direct excitation extraction system using charge state change, as shown in fig. 1, including: dipolar iron, quadrupole iron, convex rail magnet, direct current strong detector DCCT, high-speed accelerating cavity, transverse exciting device and film; six dipolar irons form a circulating track, and the particle beams move in the circulating track; a direct current strong detector DCCT and a second four-pole iron are sequentially arranged at the downstream of the first two-pole iron, and the four-pole iron is used for adjusting the position of a working point to enable the working point to be close to a resonance line; and the DC intensity detector DCCT is used for monitoring the DC intensity of the particle beam. A second dipolar iron is arranged at the downstream of the second quadrupole iron, and a high-speed acceleration cavity and a third quadrupole iron are sequentially arranged between the second dipolar iron and the third dipolar iron; the high-speed acceleration cavity is used for accelerating particle beams; the particle beam is injected from between the third dipolar iron and the fourth dipolar iron, and the fourth dipolar iron is arranged at the downstream of the particle beam injection point; a transverse excitation device and a fifth four-pole iron are sequentially arranged between the fourth two-pole iron and the fifth two-pole iron; transverse excitation means for transversely exciting the resonant particle to increase its transverse oscillation amplitude; a first convex rail magnet, a second convex rail magnet and a sixth four-pole iron are sequentially arranged between the fifth two-pole iron and the sixth two-pole iron; as shown in fig. 1, a thin film is disposed in the sixth dipolar iron (in fig. 1, the square image is a thin film), and the thin film can change the charge state of the particle beam, and is used for changing the separation height of the particle beam, so that the particle with the changed charge state is extracted from the first channel or the second channel. And a third convex rail magnet and a first four-pole iron are sequentially arranged between the sixth two-pole iron and the first two-pole iron. The synchrotron, FFAG, or any other type of accelerator may use either a normal temperature or superconducting scheme, and any number of dipole toroids may use the scheme in this embodiment.
As shown in fig. 2, when the frequency f of the transverse excitation is k With the cyclotron frequency f of the circulating beam rev Satisfy f k ＝(N±q x )f rev At this time, the amplitude of the lateral oscillation of the circulating beam gradually increases. Wherein N is an arbitrary integer, q x The fractional part of the operating point. The circular beam orbit is raised to a thin film material by using a local convex rail (3-Bump or 4-Bump) or other convex rail modes to generate charge state change, the charge and the curvature radius of the beam before/after the charge state change are q1/q2 and rho 1/rho 2 respectively, the energy is almost kept unchanged, and q1 rho 1= q2 rho 2 is met. The charge state of the circulating beam through the film material increases, i.e. q2>q1, the deflection radius of the particle beam in the dipolar iron after the change of the charge state is smaller than the deflection radius of the particle beam in the dipolar iron before the change, i.e. p 2<ρ 1, the particle beam with the changed charge state moves to the orbit direction with a small deflection radius. By adjusting the distance between the film material and the end face of the dipolar iron, particle beams before and after different separation height charge state changes are obtained at the position of the dipolar iron outlet. The extraction beam leaving the end face of the dipolar iron may enter the inner extraction first channel or be transmitted to the lower partAnd a second channel is led out from the upstream side to realize separation from the synchrotron. In general, the inner and outer exit channels should be close to the maximum position of the track with a phase shift difference of approximately 3/2 π + n.2 π (n is an integer). Wherein the width direction x of the film is defined by the horizontal emittance epsilon x 、β x Function, dispersion function D x Determined by the momentum spread of the beam, Δ p/p x Function and dispersion function D x Is one of the basic optical parameters of the synchrotron, and the calculation formula of the width direction x is as follows: x = sqrt (β) x *ε x )+D x * Δ p/p. The height direction y of the film is determined by the vertical emittance and beta y Function determination, β y The function is one of the basic parameters of the synchrotron optics, and the calculation formula of the height direction y is as follows: y = sqrt (β ∈), where sqrt () is a square root function. The thin film is a carbon film or a light organic film with a low atomic number, and the thickness of the thin film is usually 10ug/cm 2 ～100ug/cm 2 . In this embodiment, the film is disposed on a supporting frame of the film, the supporting frame has a plastic frame with certain strength and light weight, and the plastic frame may be a quadrangle, a circle, or any other shape, which is matched with the shape of the film.
In this embodiment, the first channel and the second channel include an electrostatic deflection plate, a horizontal cutting iron, a vertical cutting iron, or a vacuum duct, and the extracted particle beam is extracted from the synchrotron in the horizontal direction or the vertical direction and is transmitted to the terminal. The quasi-continuous slow-extraction beam with the magnitude of millisecond to second can be obtained by controlling the strength of the transverse excitation electric field and the rising time of the local convex rail, the time of the extraction beam can be quickly adjusted according to different requirements of the experimental terminal on the ion fluence rate, and the requirements of ion irradiation experiments and application are met.
Example two
Based on the same inventive concept, the present embodiment discloses another direct excitation extraction system using charge state change, as shown in fig. 3, including: dipolar iron, quadrupole iron, a direct current strong detector DCCT, a high-speed acceleration cavity, a transverse excitation device, a film and a convex rail magnet; six dipolar irons form a circulating track, and the particle beams move in the circulating track; a direct current strong detector DCCT and a second four-pole iron are sequentially arranged at the downstream of the first two-pole iron, and the four-pole iron is used for adjusting the position of a working point to enable the working point to be close to a resonance line; and the direct current intensity detector DCCT is used for monitoring the direct current intensity of the particle beam. A second dipolar iron is arranged at the downstream of the second quadrupole iron, and a high-speed acceleration cavity and a third quadrupole iron are sequentially arranged between the second dipolar iron and the third dipolar iron; the high-speed acceleration cavity is arranged at the upstream of the third quadrupole iron and used for accelerating particle beams; the particle beam is injected from between the third dipolar iron and the fourth dipolar iron, and the fourth dipolar iron is arranged at the downstream of the particle beam injection point; a transverse excitation device and a fifth four-pole iron are sequentially arranged between the fourth two-pole iron and the fifth two-pole iron; transverse excitation means for transversely exciting the resonant particle to increase its transverse oscillation amplitude; a first convex rail magnet, a second convex rail magnet and a sixth four-pole iron are sequentially arranged between the fifth two-pole iron and the sixth two-pole iron; the film is placed on the linear joint for changing the separation height of the particle beam, so that the particles with changed charge states are led out from the first channel or the second channel. A third convex rail magnet, a fourth convex rail magnet and a first four-pole iron are sequentially arranged between a sixth two-pole iron and the first two-pole iron, the first channel is arranged on the third convex rail magnet, and the second channel penetrates through the fourth convex rail magnet, the first four-pole iron and the first two-pole iron and is led out from the output end of the first two-pole iron. The synchrotron, FFAG, or any other type of accelerator may use either a normal temperature or superconducting scheme, and any number of dipole toroids may use the scheme in this embodiment. The thin film may be provided in a magnet other than the dipolar iron. The convex rail magnet may be a calibration iron or a Bump iron, but not limited thereto.
As shown in FIG. 4, the particle excitation process is the same as the first case, and the circular beam is directly projected to the film by using a local projected track (3-Bump or 4-Bump). If the charge state change of the circulating particle beam is large after passing through the film, the particles with the changed charge state are subjected to kicking angle action when passing through a downstream convex rail magnet, generate large separation height with the circulating particle beam, and are led out through a first channel; if the charge state change of the circulating particle beam after passing through the film is small, the separation height is small after passing through the downstream convex rail magnet, so that the circulating particle beam is transmitted to the downstream dipolar iron to generate enough separation height, is extracted through the second channel and is finally completely extracted from the synchrotron.
The first channel and the second channel comprise an electrostatic deflection plate, a horizontal cutting iron, a vertical cutting iron, a vacuum pipeline or a mutual combination scheme between the two, and the extracted particle beams are extracted from the horizontal direction or the vertical direction of the synchrotron and are transmitted to a terminal. According to the embodiment, the wide-range quasi-continuous slow-extraction beam with the magnitude of millisecond to second can be obtained by controlling the strength of the transverse excitation electric field and the rising time of the local convex rail, the time of extracting the beam can be rapidly adjusted according to different requirements of the experimental terminal on ion fluence rate, and the requirements of ion irradiation experiments and application are met.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims. The above disclosure is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A direct excitation extraction system using charge state change, comprising: dipolar iron, quadrupole iron, high-speed accelerating cavity and film;
the number of the dipolar irons is a plurality, the dipolar irons form a circulating track, and the particle beams move in the circulating track;
at least one four-pole iron is directly arranged on the two dipolar irons and used for adjusting the position of a working point to enable the working point to be close to a resonance line;
the high-speed acceleration cavity is used for accelerating the particle beam and is arranged between the two dipolar irons;
the film is arranged in one of the two pole irons or on the circulating orbit and is used for changing the separation height of the particle beams so that the particles with changed charge states are led out from the first channel or the second channel.
2. The direct-excitation extractor system using charge state change according to claim 1, wherein said extractor system further comprises a land magnet, and at least one land magnet is provided between the diode iron corresponding to said thin film and the diode iron upstream and downstream in the circulating direction thereof.
3. The direct excitation extraction system using charge state change of claim 2, wherein said film corresponds to dipolar iron: and if the film is arranged on the circulating track, the dipolar iron closest to the film is the dipolar iron corresponding to the film.
4. The direct excitation extraction system using charge state change according to claim 1, wherein the resonance extraction system further comprises a transverse excitation means and a direct current intensity detector, both of which are disposed on the circulation orbit, the transverse excitation means for transversely exciting the resonance particle to increase its transverse oscillation amplitude; the direct current intensity detector is used for monitoring the direct current intensity of the particle beam.
5. The direct excitation extraction system using charge state change of claim 4, wherein when the thin film is disposed in a diode iron, the conditions under which the particles resonate to increase the amplitude of the circulating beam are:
f k ＝(N±q x )f rev
wherein f is k Is the frequency of the transverse excitation, N is an arbitrary integer, q x Is the fractional part of the operating point, f rev Is the cyclotron frequency of the circulating beam.
6. The direct excitation extraction system using charge state modification of claim 3, wherein when said film is disposed on a raised track, the charge state of the circulating particle beam increases after passing through said film, the deflection radius of the particle beam in the dipole after charge state modification is smaller than that of the particle beam before modification, the particle beam after modification is moved to a track having a small deflection radius, and the particle beam before and after charge state modification with different separation heights is obtained at the exit of the dipole by adjusting the distance between the film material and the end face of the dipole.
7. The direct excitation extraction system using charge state change according to claim 2, wherein if the charge state change is large after the circulating particle beam passes through the thin film, the particle with charge state change is subjected to kick angle action when passing through the downstream convex rail magnet, generates a large separation height from the circulating particle beam, and is extracted through the first channel; if the charge state change of the circulating particle beam after passing through the film is small, the separation height is small after passing through the downstream convex rail magnet, so that the separation height is transmitted to the downstream dipolar iron to generate enough separation height, and the separation height is extracted through a second channel.
8. The direct excitation extraction system using charge state change according to any one of claims 1 to 7, wherein the width direction x of said thin film is defined by the horizontal emittance ε x 、β x Function, dispersion function D x Determined by the momentum spread of the beam, Δ p/p x Function and dispersion function D x Is one of the basic optical parameters of the synchrotron, and the calculation formula of the width direction x is as follows: x = sqrt (β) x *ε x )+D x * Δ p/p; the height direction y of the film is determined by the vertical emittance and beta y Function determination, β y The function is one of the basic parameters of the synchrotron optics, and the calculation formula of the height direction y is as follows: y = sqrt (β ∈), where sqrt () is a square root function.
9. The direct excitation extraction system using charge state change according to claim 8, wherein said thin film is a carbon film or a light organic film with a low atomic number.
10. The direct excitation extraction system using charge state change according to any one of claims 1 to 7, wherein the first channel and the second channel comprise an electrostatic deflection plate, a horizontal cutting iron, a vertical cutting iron, or a vacuum duct, and the extracted particle beam is extracted from a horizontal direction or a vertical direction of the synchrotron and is transported to a terminal.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101815399A (en) * | 2009-01-12 | 2010-08-25 | 中国科学院近代物理研究所 | Radio frequency excitation leading-out method and device in heavy-ion cancer therapy synchronous accelerator |
| CN102793979A (en) * | 2012-07-28 | 2012-11-28 | 中国科学院近代物理研究所 | Proton or heavy ion beam cancer treatment device |
| CN114531769A (en) * | 2022-03-03 | 2022-05-24 | 清华大学 | Multi-energy extraction method of synchrotron |
| CN115003004A (en) * | 2022-05-25 | 2022-09-02 | 国科离子医疗科技有限公司 | Miniaturized ion synchrotron |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101815399A (en) * | 2009-01-12 | 2010-08-25 | 中国科学院近代物理研究所 | Radio frequency excitation leading-out method and device in heavy-ion cancer therapy synchronous accelerator |
| CN102793979A (en) * | 2012-07-28 | 2012-11-28 | 中国科学院近代物理研究所 | Proton or heavy ion beam cancer treatment device |
| CN114531769A (en) * | 2022-03-03 | 2022-05-24 | 清华大学 | Multi-energy extraction method of synchrotron |
| CN115003004A (en) * | 2022-05-25 | 2022-09-02 | 国科离子医疗科技有限公司 | Miniaturized ion synchrotron |
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