CN212395623U - Superconducting rotating frame for laser accelerating proton cancer treatment device - Google Patents
Superconducting rotating frame for laser accelerating proton cancer treatment device Download PDFInfo
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- CN212395623U CN212395623U CN202021307430.5U CN202021307430U CN212395623U CN 212395623 U CN212395623 U CN 212395623U CN 202021307430 U CN202021307430 U CN 202021307430U CN 212395623 U CN212395623 U CN 212395623U
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Abstract
The utility model discloses a superconductive rotating frame for a laser acceleration proton cancer treatment device, which belongs to the field of medical appliances. The superconducting rotating machine frame comprises a scanning treatment head, a vacuum system, a beam transmission system and a beam diagnosis system, wherein a plurality of local achromatic transmission sections are arranged in the beam transmission system, each local achromatic transmission section comprises a plurality of mixed field type superconducting deflection magnets, the mixed field type superconducting deflection magnets provide a mixed magnetic field, the mixed magnetic field is a high-order magnetic field such as a quadrupole magnetic field and a hexapole magnetic field which are superposed on a deflection magnetic field, and the superconducting rotating machine frame has a deflection function and a focusing function. The utility model discloses a technique of local dispersion that disappears avoids the beam current envelope to increase too big in rotatory frame transmission process, and adopts mixed field type superconducting magnet technique, has alleviateed the total weight of rotatory frame, has reduced the cost of rotatory frame.
Description
Technical Field
The utility model belongs to the field of medical equipment, concretely relates to superconductive rotating frame that is used for laser acceleration proton to treat cancer device.
Background
Proton cancer therapy is a very advantageous radiotherapy technique because proton energy deposition in the body has a bragg peak, and therefore, the proper proton energy and lateral irradiation range are selected, which can form the maximum dose irradiation at the tumor site in the patient. Compared with the traditional radiotherapy technologies such as X-ray, gamma ray, electron and the like, the method has the advantages of being more accurate and causing the peripheral normal tissues to be less damaged by irradiation, and is a development direction of a new generation of radiotherapy technology. Proton cancer treatment devices typically use cyclotron, synchrotron, or linear accelerator devices. The application of a novel laser acceleration technology in the aspect of cancer treatment is also a research hotspot, the existing proton cancer treatment device usually designs a rotating rack for irradiating patients from multiple angles, but the design scheme adopted by many rotating racks uses a normal-temperature magnet, and because a beam distribution system needs to realize many functions, the rotating rack has heavy equipment weight which reaches hundreds of tons, and the whole rotating rack is very expensive in manufacturing cost.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a superconductive rotating frame for laser accelerates proton cancer treatment device, this rotating frame adopts the technique of local dispersion that disappears, avoids the beam current envelope increase too big in rotating frame transmission process, leads to the totality cost to rise.
The technical scheme of the utility model be, a superconductive rotating frame for laser acceleration proton cancer treatment device, including scanning treatment head, vacuum system, beam transmission system and beam diagnostic system, its characterized in that: the beam transmission system is provided with a plurality of local achromatic transmission sections, each local achromatic transmission section comprises a plurality of mixed field type superconducting deflection magnets, the mixed field type superconducting deflection magnets are used for providing a mixed magnetic field, the mixed magnetic field is formed by superposing high-order magnetic fields such as a quadrupole magnetic field and a hexapole magnetic field on a dipolar deflection magnetic field, and the mixed magnetic field has the functions of deflection, focusing and the like.
The local dispersion-eliminating transmission section comprises more than two mixed field type superconducting deflection magnets, a slit is arranged between the mixed field type superconducting deflection magnets, and the slit is used for selecting the energy of beam current.
The local achromatic transmission section further comprises a plurality of quadrupole lenses for adjusting beam parameters, and the quadrupole lenses are symmetrically arranged on two sides of the plane of the mixed field type superconducting deflection magnet.
The beam transmission system is provided with more than two local dispersion elimination transmission sections, wherein two adjacent local dispersion elimination transmission sections can be directly connected. Or a quadrupole lens group is arranged between two adjacent local achromatic transmission sections and is used for adjusting beam parameters.
The utility model has the advantages that:
the utility model discloses a local achromatic dispersion and novel mixed field type superconductive deflection magnet technique are controlled the proton beam through the local achromatic dispersion transmission section of a plurality of sections and are flowed, realize the rising of line, and the horizontal deflection descends, the final vertical incidence patient's tumour position. The utility model discloses a big ability beam current that looses that local achromatic dispersion's technique was avoided laser to produce increases too big at rotatory frame transmission in-process envelope, has reduced the aperture of magnet to reduce the magnet cost, used mixed type superconducting magnet can the whole bunch of greatly reduced go up the weight of magnet, thereby reduced the total weight of bunch in the whole rotatory frame, reduced the manufacturing degree of difficulty and the total cost of rotatory frame.
Drawings
Fig. 1 is a schematic view of a rotating frame of a laser proton accelerator according to the present invention;
fig. 2 is a schematic diagram of the hybrid field superconducting deflection magnet of the present invention providing a hybrid magnetic field;
fig. 3 is a schematic structural diagram of the local dispersion-eliminating transmission section of the present invention;
figure 1-scanning treatment head; 2- -vacuum system; 3-beam diagnosis system; 4-local de-dispersion transmission section; 5- -mixed field superconducting deflection magnet; 6- -quadrupole lens.
Detailed Description
The present invention is further illustrated by the following examples. It is noted that the disclosed embodiments are intended to aid in further understanding of the invention, but those skilled in the art will appreciate that: various substitutions and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the present invention should not be limited to the embodiments disclosed, and the scope of the present invention is defined by the appended claims.
The rotating frame for the laser proton accelerator comprises a scanning treatment head 1, a vacuum system 2, a beam diagnosis system 3 and a beam transmission system, wherein the scanning treatment head 1 comprises a scanning magnet and a dose detector and a position detector of a gas ionization chamber which are matched with the scanning magnet; the vacuum system 2 comprises a beam vacuum pipeline, a cavity, a vacuum pump and a valve; the beam diagnosis system 3 is used for monitoring information such as beam position, distribution and electric quantity in the beam vacuum pipeline and comprises a cavity BPM beam position detector and a gas ionization chamber position detector which are arranged along a beam line, and a gas ionization chamber dose detector and a position detector which are arranged at a treatment head; the beam transmission system is used for realizing the rising, horizontal deflection and falling of beams, and is provided with a plurality of local dispersion eliminating transmission sections 4, wherein each local dispersion eliminating transmission section 4 comprises one or more mixed field type superconductive deflection magnets 5 and 0 or more quadrupole lenses 6. The mixed field type superconducting deflection magnet can provide a mixed magnetic field structure, the mixed magnetic field is formed by superposing high-order magnetic fields such as a quadrupole magnetic field, a hexapole magnetic field and the like on the basis of a deflection magnetic field, and meanwhile, the mixed magnetic field has the functions of deflection, focusing and the like, so that beam transmission can not be influenced by energy dispersion. The utility model discloses mixed field type superconductive deflection magnet CCT (housed Cosine theta) or DCT (discrete Cosine transform) superconductive magnet, etc.
Embodiment one of the utility model
The utility model provides a rotating frame including three sections local achromatic dispersion transmission sections, as shown in figure 1, at first deflect the beam by first section local achromatic dispersion transmission section, and the dipolar magnetic deflection field deflection angle in the local achromatic dispersion transmission section is between 20-45 degrees, and magnetic deflection field is between 1.5T-4.5T, and the magnetic field gradient of quadrupole magnetic field is 10-50T/m, and the radius of deflection is between 0.3 meter-1.2 meters. The beam direction is changed from horizontal to vertical or inclined upwards (between 45 and 90 degrees), meanwhile, energy selection is carried out on the beam in a local de-dispersion section, and the energy selection function is realized by adjusting the width of a slit between two superconducting magnets so as to adjust the energy spectrum shape of the beam. After passing through the first deflection transmission section, a beam diagnosis system, a BPM beam position detector or a gas ionization chamber position detector is installed and used for measuring beam parameters. After the beam diagnosis system, a quadrupole lens group is installed, and beam parameters such as beam envelope size and the like are controlled by using the focusing function of the quadrupole lens group (optionally installed or not installed), wherein the envelope size is usually between 10mm and 60mm, the magnetic field gradient of the quadrupole lens is between 5 and 30T/m, and the aperture is 40 to 100 mm. And a second section of local achromatic dispersion transmission section is arranged behind the quadrupole lens to adjust the beam in the vertical upward or oblique beam direction to be in the horizontal direction, a quadrupole lens group (which can be optionally installed or not) is arranged behind the second section of local achromatic dispersion transmission section to control beam parameters such as beam envelope size, and the parameter range of the quadrupole lens is the same as that of the first section. And a gas ionization chamber is arranged behind the quadrupole lens group to measure beam position parameters. And a third partial dispersion eliminating transmission section is arranged behind the gas ionization chamber, and deflects the beam current from the horizontal direction to the vertical downward direction. After the local achromatic transmission section of third section, installation scanning treatment head, the utility model discloses install two scanning magnets in the treatment head, carry out x direction and y direction scanning respectively, behind two scanning magnets, install two beam position detectors, carry out beam position measurement, after two beam position detectors, install two beam dose detectors, make the beam realize shining in the field greatly through the method of scanning.
Embodiment two of the utility model
The utility model provides a rotatory frame including two sections local achromatic dispersion transmission sections, at first deflect the beam current by first section local achromatic dispersion transmission section, the beam current direction becomes perpendicular upwards or slope upwards from the level, dipolar magnetic deflection field deflection angle in the local achromatic dispersion transmission section is between 20-45 degrees, magnetic deflection field is between 1.5T-4.5T, magnetic field gradient 10-50T/m in quadrupole magnetic field, the radius of deflection is between 0.3 meter-1.2 meters, and simultaneously, can select the ability to the beam current in the achromatic dispersion section, adjust through the slit width between two superconducting magnets and realize selecting the ability function, adjust the energy spectrum shape of beam current. After passing through the first deflection transmission section, a beam diagnosis system, a BPM beam position detector or a gas ionization chamber position detector is installed and used for measuring beam parameters. After the beam diagnosis system, a quadrupole lens group (which can be optionally installed or not installed) is installed, and beam parameters such as beam envelope size and the like are controlled by using the focusing function of the quadrupole lens group. And a second section of local dispersion elimination transmission section is arranged behind the quadrupole lens to adjust the beam in the beam direction vertically upwards or obliquely downwards, the deflection angle of a two-pole deflection magnetic field in the local dispersion elimination transmission section is 45-90 degrees, the deflection magnetic field is 1.5T-4.5T, the magnetic field gradient of the quadrupole magnetic field is 10-50T/m, and the deflection radius is 0.3 m-1.2 m. After the local achromatic transmission section of second section, installation scanning treatment head, the utility model discloses install two scanning magnets in the treatment head, carry out x direction and y direction scanning respectively, behind two scanning magnets, install two beam position detectors, carry out beam position measurement, after two beam position detectors, install two beam dose detectors, make the beam realize shining the field greatly through the method of scanning.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. The invention is not limited to the embodiments described herein, but is capable of other embodiments with obvious modifications and variations, including those shown in the drawings and described herein. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention all still fall within the protection scope of the technical solution of the present invention, where the technical entity does not depart from the content of the technical solution of the present invention.
Claims (5)
1. A superconductive rotating frame for a laser acceleration proton cancer treatment device comprises a scanning treatment head, a vacuum system, a beam transmission system and a beam diagnosis system, and is characterized in that: the beam transmission system is provided with a plurality of local achromatic transmission sections, each local achromatic transmission section comprises a plurality of mixed field type superconducting deflection magnets, the mixed field type superconducting deflection magnets are used for providing a mixed magnetic field, and the mixed magnetic field is formed by superposing a four-pole magnetic field or a six-pole magnetic field on the basis of a two-pole deflection magnetic field.
2. The superconducting rotating gantry for laser-accelerated proton cancer therapy device according to claim 1, wherein the local-achromatic transmission section comprises two or more mixed-field superconducting deflection magnets, and a slit is installed between the mixed-field superconducting deflection magnets and used for selecting the energy of the beam.
3. A superconducting rotating gantry for a laser-accelerated proton cancer treatment apparatus according to claim 1 or 2, wherein the local achromatic transmission section further comprises a plurality of quadrupole lenses for beam parameter adjustment, the quadrupole lenses being symmetrically arranged at both sides of the mixed-field superconducting deflection magnet.
4. The superconducting rotating gantry for laser-accelerated proton cancer therapy apparatus according to claim 1, wherein said beam delivery system has two or more local-achromatic transmission segments, and two adjacent local-achromatic transmission segments are directly connected.
5. The superconducting rotating gantry for laser-accelerated proton carcinostatic device according to claim 1, wherein the beam transmission system has two or more local-achromatic transmission sections, and a quadrupole lens set is installed between two adjacent local-achromatic transmission sections, and the quadrupole lens set is used for adjusting beam parameters.
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| CN202021307430.5U CN212395623U (en) | 2020-07-07 | 2020-07-07 | Superconducting rotating frame for laser accelerating proton cancer treatment device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111790063A (en) * | 2020-07-07 | 2020-10-20 | 北京大学 | Superconducting rotating frame for laser accelerating proton cancer treatment device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111790063A (en) * | 2020-07-07 | 2020-10-20 | 北京大学 | Superconducting rotating frame for laser accelerating proton cancer treatment device |
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| GR01 | Patent grant | ||
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Beijing Rui de Kang Technology Co.,Ltd. Assignor: Peking University Contract record no.: X2023980034688 Denomination of utility model: Superconducting rotating frame for laser accelerated proton cancer treatment device Granted publication date: 20210126 License type: Exclusive License Record date: 20230412 |
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| EE01 | Entry into force of recordation of patent licensing contract |