CN115413105A - 360 that can realize multi-terminal delivery o Superconducting rotating beam line - Google Patents
360 that can realize multi-terminal delivery o Superconducting rotating beam line Download PDFInfo
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Abstract
The invention relates to a 360-degree superconducting rotating beam line capable of realizing multi-terminal distribution, which comprises a leading-out distribution section, a superconducting rotating section, a treatment room straight-through section and a rotating bracket, wherein the leading-out distribution section is provided with a plurality of guide holes; the leading-out distribution section is constructed to be suitable for envelope and dispersion modulation of the beam current from the front-stage accelerator; the superconducting rotating section is constructed to be suitable for guiding the beam current from the leading-out distribution section to the vertical direction from the horizontal direction, and the superconducting rotating section is installed on the rotating bracket; an air section is arranged between the treatment room straight-through section and the superconducting rotating section, the beam current from the superconducting rotating section passes through the air section and then is injected into the treatment room straight-through section, and finally the modulated beam current is guided into terminals with different angles through the treatment room straight-through section. The invention greatly reduces the number of beam distribution lines between the accelerator and different terminals, and is beneficial to greatly reducing the number of beam lines of an accelerator system, thereby reducing the construction cost; meanwhile, only one beam line is arranged, so that the whole system layout is more compact, and the reduction of the scale of the whole system is facilitated.
Description
Technical Field
The invention relates to a 360-degree superconductive rotary beam line capable of realizing multi-terminal distribution, and belongs to the technical field of medical treatment and irradiation.
Background
Since the first electrostatic accelerator came out, with the continuous progress of science and technology, various accelerator devices of different types such as cyclotron, synchro, linear, laser, etc. were successively designed and successfully built, and the ion beam energy was also continuously increased from the initial KeV level to the current TeV level. However, in any type of ion accelerator, except for the accelerator internal target experiment, the ion beam extracted from the accelerator needs to be distributed to the experiment terminal by using the beam distribution line, so that almost all the accelerator experiment terminals need to build at least one beam distribution line.
In recent years, carbon ion cancer treatment devices have become the best choice for cancer treatment because carbon ions have a superior relative biological effect than electrons and protons, i.e., they can generate DNA Double Strand Breaks (DSBs) that are difficult to repair. Based on treatment needs, the treatment of tumors at different parts needs to be configured with fixed treatment terminals with different incident angles, and the most common fixed treatment terminals at present comprise a horizontal terminal, a vertical terminal and a 45-degree terminal. In order to configure the fixed therapy terminals, according to the conventional design concept, each therapy terminal corresponds to one beam distribution line, and a lengthy and complicated beam line design is required. For example, a conventional accelerator dedicated to carbon ion therapy for cancer is generally configured with 4 therapy terminals, i.e., a horizontal therapy terminal, a vertical therapy terminal, a horizontal + vertical therapy terminal, and a 45 ° therapy terminal. In order to distribute the carbon ion beam from the accelerator to the 4 treatment terminals, the beam distribution line generally needs to adopt a large deflection magnet to realize the climbing and the downward penetration of the beam line, so that the device has large scale and high equipment processing and installation cost, the number of the beam lines is greatly increased, and the total length of the beam lines can reach hundreds of meters.
Disclosure of Invention
In view of the above problems, it is an object of the present invention to provide a 360 ° superconducting rotating beam line that can achieve multi-terminal distribution.
In order to achieve the purpose, the invention adopts the following technical scheme:
a360-degree superconducting rotary beam line capable of realizing multi-terminal distribution comprises a leading-out distribution section, a superconducting rotary section, a treatment room straight-through section and a rotary support; the leading-out distribution section is constructed to be suitable for leading in the superconducting rotating section after envelope and dispersion modulation is carried out on beams from a front-stage accelerator; the superconducting rotating section is designed in a 90-degree deflection superconducting mode, the superconducting rotating section is constructed to be suitable for guiding beam current from the leading-out distribution section to the vertical direction from the horizontal direction, and the superconducting rotating section is fixedly installed on the rotating support which can rotate around a fixed shaft by 0-360 degrees; the treatment room straight-through section is arranged at the downstream of the superconducting rotating section, an air section is arranged between the treatment room straight-through section and the superconducting rotating section, the beam from the superconducting rotating section penetrates through the air section and then enters the treatment room straight-through section, and finally the modulated beam is guided into terminals with different angles through the treatment room straight-through section.
Preferably, the extraction and distribution section comprises an envelope and dispersion modulation quadrupole lens group, a guide magnet and an envelope modulation quadrupole lens group which are connected in sequence; wherein the envelope and dispersion modulation quadrupole lens group is configured and adapted to simultaneously envelope and dispersion modulate a beam from a preceding accelerator and then introduce the beam into the guide magnet, the guide magnet is configured and adapted to introduce the beam downstream in a predetermined direction into the envelope modulation quadrupole lens group, and the envelope modulation quadrupole lens group is configured and adapted to envelope modulate the beam from the guide magnet again.
360 rotatory bunch of superconduction, preferably, envelope and dispersion modulation quadrupole lens group include three first defocus quadrupole lenses and three first focus quadrupole lenses, just three defocus quadrupole lenses and three focus quadrupole lenses arrange along the beam direction in turn, three defocus quadrupole lenses and three focus quadrupole lenses with direction magnet forms reverse dispersion structure jointly to eliminate the dispersion of substituting when preceding stage accelerator draws the beam.
Preferably, the envelope modulation quadrupole lens group comprises two second focusing Jiao Siji lenses and two second defocusing quadrupole lenses, the two focusing quadrupole lenses and the two defocusing quadrupole lenses are alternately arranged along the beam direction, and the two focusing quadrupole lenses and the two defocusing quadrupole lenses are used for matching the twiss parameters of the beam at the entrance of the superconducting rotating section when the superconducting rotating section is located at different azimuth angles, and simultaneously considering envelope modulation of the beam on the way.
The 360 ° superconducting rotating beam line, preferably, the superconducting rotating section comprises: the rotating section guiding magnet group consists of a 90-degree superconducting diode magnet beam based on CCT coil technology and five superconducting quadrupole lenses embedded in the 90-degree superconducting diode magnet beam, wherein the 90-degree superconducting diode magnet beam and the five superconducting quadrupole lenses optically form a complete right symmetrical achromatic joint together, and the 90-degree superconducting diode magnet beam and the five superconducting quadrupole lenses are used for carrying out envelope and chromatic dispersion modulation on the beam current from the leading-out distribution section at the same time and deflecting for 90 degrees; and the bidirectional scanning magnet group is arranged at the downstream of the rotating section guiding magnet group and is connected with the rotating section guiding magnet group through a vacuum pipeline, and the bidirectional scanning magnet group is used for carrying out target point transverse position calibration on the modulated beam current.
The 360-degree superconducting rotating beam line preferably comprises a first support ring, a second support ring, a driving ring and a driving mechanism, wherein the first support ring, the second support ring and the driving ring are coaxially arranged and sequentially connected through a connecting rod, the driving mechanism is connected with the driving ring, the diameter of the first support ring is the same as that of the second support ring, and the diameter of the driving ring is smaller than that of the second support ring.
The 360-degree superconducting rotating beam line preferably further comprises a balancing weight, and the balancing weight is connected with the first support ring, the second support ring and the superconducting rotating section through connecting pieces so as to ensure the dynamic balance of the system.
The 360 ° superconducting rotating beam line, preferably, the driving mechanism includes a worm gear and a worm screw, the worm gear is assembled on the driving ring, and the worm screw is in gear joint with the worm gear.
The 360-degree superconducting rotating beam line is preferably separated from the superconducting rotating section and the treatment room straight-through section by a double-layer titanium alloy vacuum window.
Preferably, the 360-degree superconducting rotating beam line is connected with a rotating point between the leading-out distribution section and the superconducting rotating section by a magnetic fluid sealing device.
Due to the adoption of the technical scheme, the invention has the following advantages:
1. the beam distribution line is divided into three parts, namely a leading-out distribution section, a rotation section and a treatment room straight-through section according to functional requirements, because of different functions, the mode of realizing the light path design of each part is completely different, the first part is a normal-temperature fixed beam line, the mode mainly uses compact structure, dispersion elimination and interface matching as a main line, the second part is a superconducting rotating beam line, the mode mainly uses the functions of optical realization after rotating at different angles, beam spot consistency in different terminal irradiation fields and the like as the main line, and the third part has no magnetic elements, has relatively simple functions, mainly uses the lossless passing of an ion beam as a main design basis, simultaneously considers reserving enough longitudinal space, and is used for installing some beam measuring and beam shaping equipment corresponding to the tail end of the beam line and a treatment terminal.
2. The beam distribution line has clear function and small rotation radius, can realize beam distribution at any angle of 0-360 degrees in a vertical plane, and therapeutic rooms are distributed in a treatment plane along the periphery of the rotation beam line according to a certain rule.
3. The invention adopts a one-to-many design concept, can effectively replace a plurality of distribution lines such as a horizontal terminal distribution line, a vertical terminal distribution line, a 45-degree terminal distribution line and the like in the carbon ion treatment device by reasonably arranging and only rotating one beam line, deeply simplifies the beam distribution system of the whole device in the aspects of the number, the scale and the like of the beam lines on the premise of not influencing the overall performance of the device, and simultaneously compresses the construction cost of the device in the aspects of construction cost and occupied area. In the most rough estimation, the cancer treatment device is designed by adopting the idea, the scale of a beam distribution system can be reduced by more than 70%, and the hardware cost can be saved by more than 2/3.
4. The beam distribution line adopts a compact and light design concept, the beam line at the rotating section is fixedly arranged on the rotating support and rotates 360 degrees along with the rotating support to distribute the beam to the treatment room vertically distributed around the periphery of the superconducting rotating beam line, and compared with the beam line at a fixed angle, the beam distribution line has the advantages of more compact device layout and low beam line cost, thereby being more suitable for wide popularization.
5. The beam distribution line is designed in a zone achromatic mode, and the zone achromatic mode has the advantages of reducing the height of chromatic dispersion to the maximum extent, reducing the area influenced by chromatic dispersion, reducing the hardware size of the magnetic element and reducing the cost of the magnetic element on the premise of not influencing beam transmission efficiency.
6. The beam distribution line design scheme of the invention can be used for a carbon ion cancer treatment device, a proton device and any other type of multi-terminal accelerator device, and is a universal scheme in the fields of radiotherapy and irradiation.
Drawings
Fig. 1 is a view showing the overall configuration of a superconducting rotating beam line according to an embodiment of the present invention;
FIG. 2 is an optical diagram of an exit distribution section provided by one embodiment of the present invention;
FIG. 3 is a structural layout diagram of a superconducting rotating section provided in accordance with an embodiment of the present invention;
FIG. 4 is an optical diagram of a superconducting rotating section provided by an embodiment of the present invention;
FIG. 5 is a schematic side view of a rotating bracket according to an embodiment of the present invention;
fig. 6 is a front view schematically illustrating the structure of the rotating bracket according to the embodiment of the present invention;
fig. 7 is a schematic orthographic view of an optical path for supplying beams to different terminals within 180 ° of a superconducting rotating section according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "transverse," "vertical," "upper," "lower," and the like refer to orientations or positional relationships based on orientations or positional relationships shown in the drawings, which are only for convenience in describing the present invention and for simplifying the description, and do not indicate or imply that the system or element referred to must have a particular orientation, be constructed in a particular orientation, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used to define elements only for convenience in distinguishing between the elements, and unless otherwise stated, are not intended to imply any particular meaning or importance to the contrary.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "assembled", "disposed" and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The beam delivery line is an integral part of almost all accelerator systems and is primarily responsible for beam delivery between accelerators and from accelerator to terminals, such as an experimental terminal or a treatment terminal. In the design of the current accelerator system, the beam distribution lines and all terminals are designed by adopting a fixed one-to-one correspondence relationship, namely, one terminal is necessarily corresponding to one beam distribution line. In order to reduce the construction cost and the occupied area of an accelerator system and improve the cost performance of the accelerator, the invention provides a 360-degree superconducting rotary beam line structure capable of realizing multi-terminal distribution, the design concept of the beam line structure is that only one beam flow distribution line is designed between the accelerator and each terminal through optimized device layout, and a mode of connecting different terminals is selected through rotation of 0-360 degrees, so that one-to-many distribution relations are formed between different accelerators and different terminals. The invention has the advantages that the number of beam distribution lines between the accelerator and different terminals is greatly reduced, which is beneficial to greatly reducing the number of beam lines of an accelerator system, thereby reducing the construction cost; meanwhile, only one beam line is arranged, so that the whole system layout is more compact, and the reduction of the scale of the whole system is facilitated.
Hereinafter, a 360 ° superconducting rotating beam line capable of realizing multi-terminal distribution according to an embodiment of the present invention will be described in detail with reference to the drawings.
Fig. 1 shows an overall structural layout of a superconducting rotary beam line provided according to an embodiment of the present invention, which includes an outgoing distribution section 1, a superconducting rotary section 2, and a treatment room through section 3.
The extraction and distribution section 1 comprises an envelope and dispersion modulation quadrupole lens group 11, a guide magnet 12 and an envelope modulation quadrupole lens group 13 which are connected in sequence. Wherein, the envelope and dispersion modulation quadrupole lens group 11 is configured and adapted to simultaneously envelope and dispersion modulate the beam from the front stage accelerator and then introduce the beam into the guide magnet 12, the guide magnet 12 is configured and adapted to introduce the beam into the envelope modulation quadrupole lens group 13 at the downstream in a predetermined direction, and the envelope modulation quadrupole lens group 13 is configured and adapted to envelope modulate the beam from the guide magnet 12 again and then introduce the beam into the superconducting rotating section 2.
In the above embodiment, preferably, the envelope and dispersion modulation quadrupole lens set 11 includes three first defocusing quadrupole lenses 111 and three first focusing quadrupole lenses 112, and the three defocusing quadrupole lenses 111 and three focusing quadrupole lenses 112 are alternately arranged along the beam direction, and the three defocusing quadrupole lenses 111 and three focusing quadrupole lenses 112 form a reverse dispersion-eliminating structure together with the guiding magnet 12, so that the dispersion (section dispersion-eliminating) substituted when the front-stage accelerator extracts the beam can be eliminated, the dispersion is prevented from affecting the beam at the exit of the guiding magnet 12 and in the subsequent transmission, and the section dispersion-eliminating is compatible with the modulation of the beam envelope.
In the above embodiment, preferably, the envelope modulation quadrupole lens set 13 includes two second focusing Jiao Siji lenses 131 and two second defocusing quadrupole lenses 132, and the two focusing quadrupole lenses 131 and the two defocusing quadrupole lenses 132 are alternately arranged along the beam direction, and the two focusing quadrupole lenses 131 and the two defocusing quadrupole lenses 132 are mainly used for matching the twiss parameter of the beam at the entrance when the superconducting rotating section 2 is located at different azimuth angles, and simultaneously considering the envelope modulation of the beam along the way, thereby simplifying the complex problem by means of local layering processing.
Fig. 2 is an optical diagram of the lead-out distribution section 1, in which the abscissa represents the position of the magnetic element in the lead-out distribution section 1 in a natural coordinate system, wherein black blocks symmetrical up and down on the abscissa represent the guidance magnets, small black blocks above the axis of the abscissa represent the horizontal focusing quadrupole lenses, and small black blocks below the axis of the ordinate represent the horizontal defocusing quadrupole lenses. The symmetrical solid lines positioned on the peripheries of the two sides of the horizontal coordinate axis represent envelopes caused by the emittance of the beam, the symmetrical solid lines positioned on the local inner sides of the two sides of the horizontal coordinate axis represent envelopes caused by the dispersion of the beam, and the superposition of the two indexes means that the sizes of horizontal and vertical beam spots fluctuate totally when the beam is stably transmitted in the leading-out distribution section 1. It can be seen from the figure that the dispersion exists in the horizontal plane of the system, the zero dispersion exists in the vertical plane, the half-envelope of the beam is smaller than 20mm, and the optical diagram can judge that the envelope of the beam is smaller and the size of hardware corresponding to other systems is smaller, thereby being beneficial to controlling the hardware cost of the beam distribution system.
Fig. 3 shows a structural layout of the superconducting rotating section 2 provided according to the embodiment of the present invention, the superconducting rotating section 2 is designed in a 90 ° deflected superconducting mode, and is configured to guide the beam current from the outgoing distribution section 1 from the horizontal direction to the vertical direction. Specifically, the superconducting rotating section 2 comprises a rotating section guiding magnet group 21 and a bidirectional scanning magnet group 22 which are connected through a vacuum pipeline, wherein the rotating section guiding magnet group 21 is composed of a 90-degree superconducting dipole magnet beam 211 based on CCT (inclined solenoid type) coil technology and five superconducting quadrupole lenses 212 embedded in the 90-degree superconducting dipole magnet beam 211 and the five superconducting quadrupole lenses 212, the 90-degree superconducting dipole magnet beam 211 and the five superconducting quadrupole lenses 212 form a complete opposite symmetric achromatic joint in optics, and the superconducting rotating section has a dipole magnetic field and a quadrupole magnetic field, has a deflection function and a focusing function, and has a rotating radius of about 3 m. After the beam current from the leading-out distribution section 1 enters the superconducting rotation section 2, the envelope and dispersion of the beam current are modulated simultaneously by five superconducting quadrupole lenses 212 and a 90-degree superconducting diode magnet beam 211 according to the requirement of the beam current at the tail end, the modulated beam current is subjected to target point transverse position calibration through the bidirectional scanning magnet group 22, and the bidirectional scanning magnet 22 has the scanning functions in the vertical direction and the horizontal direction, so that the scanning length can be shortened. Meanwhile, the whole superconducting rotating section 2 is fixedly arranged on a rotating support 4 (shown in figure 5), and the rotating support 4 can rotate around a fixed shaft by 0-360 degrees, so that the beam is guided into terminals with different angles of horizontal, vertical or 45 degrees and the like through the treatment room through section 3.
Fig. 4 is an optical diagram of the superconducting rotating section 2, in which the abscissa represents the position of the magnetic element in the superconducting rotating section 2 in the natural coordinate system, and similarly to fig. 2, large black blocks symmetrical up and down on the abscissa represent the 90 ° superconducting dipole magnet beam, and 5 small black blocks representing the superconducting quadrupole lens are completely embedded inside the 90 ° superconducting dipole magnet beam (the specific embedding position is shown in fig. 3). Three symmetrical solid lines positioned on the peripheries of two sides of a horizontal coordinate axis respectively represent the envelope conditions of the beam when the beam rotates by 0 degrees, 180 degrees, 45 degrees and 225 degrees on a horizontal plane and a vertical plane and rotates by 90 degrees of azimuth angles (corresponding to 5 azimuth terminals such as 0 degrees, 45 degrees, 90 degrees, 135 degrees, 180 degrees and the like), and as can be seen from the figure, similar to the leading-out distribution section 1, the half envelope of the beam of the superconducting rotation section 2 is also smaller than 20mm, and the envelope is also beneficial to controlling the hardware cost of a beam line distribution system.
The treatment room through section 3 is arranged at the downstream of the superconducting rotating section 2, an air section exists between the treatment room through section 3 and the superconducting rotating section 2 (namely the treatment room through section 3 and the superconducting rotating section 2 are not directly connected), the treatment room through section 3 only comprises a beam transmission channel, and beam detecting and shaping equipment is arranged on the beam transmission channel. The beam from the superconducting rotating section 2 passes through the air section and then enters the treatment room straight-through section 3, and finally the modulated beam is guided into terminals with different angles such as horizontal, vertical or 45 degrees through the treatment room straight-through section 3.
In the above embodiment, preferably, as shown in fig. 5 and 6, the rotating bracket 4 includes the first support ring 41, the second support ring 42, the drive ring 43 and the driving mechanism, the rotating bracket 4 adopts a combination scheme of large (the first support ring 41 and the second support ring 42 have large diameters) and small (the drive ring 43 has small diameter), and the three rings are connected through the connecting rod 44 to form a "funnel" structure, so that the cross section is gradually changed, the weight is light, and the driving radius is small. The drive mechanism is connected to the drive ring 43 for driving the drive ring 43 to rotate. In some preferred embodiments of the present invention, the rotating bracket 4 further comprises a weight 45, and the weight 45 is connected to the first support ring 41, the second support ring 42 and the superconducting rotating section 2 through a connecting member 46, and finally the center of mass is located on the rotation axis I of the rotating system and between the first support ring 41 and the second support ring 42, so as to ensure the dynamic balance of the rotating system.
In the above embodiment, preferably, the driving mechanism includes a worm wheel 47 and a worm 48, the worm wheel 47 is mounted on the driving ring 43 of the rotating frame, the worm 48 is in toothed connection with the worm wheel 47, and the superconducting rotating section 2 can rotate 0-360 ° with the rotating bracket 4 under the action of the driving mechanism. The driving mechanism of the invention adopts a worm and gear mechanism, the turbine is arranged on the driving ring, the diameter of the turbine is small, the structure is compact, the speed ratio is large, the bearing is high, and the operation is stable.
In the above embodiment, it is preferable to use a double titanium alloy vacuum window 5 to separate the superconducting rotating section 2 and the treatment room straight-through section 3, as shown in fig. 3, to maintain the stability of the whole beam line vacuum.
In the above embodiment, preferably, as shown in fig. 5,the rotation points between the leading-out distribution section 1 and the superconducting rotation section 2 are connected by a magnetic fluid sealing device 6 so as to maintain the vacuum degree of a beam transmission channel in the rotation process. The magnetic fluid sealing device 6 enables the magnetic fluid to be filled in a set space under the action of a uniform stable magnetic field, and establishes a multi-stage O-shaped sealing ring, so that the sealing effect is achieved, the magnetic fluid sealing device is widely recognized as a zero-leakage dynamic sealing advanced technology, and the vacuum degree can reach 10 -6 Pa magnitude, and the requirement of beam current on the vacuum degree required by the transmission of the vacuum pipeline is completely met.
Fig. 7 shows a schematic diagram of a forward projection of a 360 ° superconducting rotating beam line provided by the present invention for supplying beams to two horizontal terminals, two 45 ° terminals, and a vertical terminal during a 180 ° rotation. The terminal a is defined as the rotation starting position of the beam distribution line, and as can be clearly seen from the figure, every 45 degrees of rotation of the rotation section will be connected with the through line of the next terminal. Of course, each specific rotation angle is determined according to the specific positions of the terminals twice before and after.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A360-degree superconducting rotating beam line capable of realizing multi-terminal distribution is characterized by comprising a leading-out distribution section, a superconducting rotating section, a treatment room straight-through section and a rotating bracket;
the leading-out distribution section is constructed to be suitable for leading the beam current from the front-stage accelerator into the superconducting rotating section after envelope and dispersion modulation;
the superconducting rotating section is designed in a 90-degree deflection superconducting mode, the superconducting rotating section is constructed to be suitable for guiding beam current from the leading-out distribution section to the vertical direction from the horizontal direction, and the superconducting rotating section is fixedly installed on the rotating support which can rotate around a fixed shaft by 0-360 degrees;
the treatment room straight-through section is arranged at the downstream of the superconducting rotating section, an air section is arranged between the treatment room straight-through section and the superconducting rotating section, the beam from the superconducting rotating section penetrates through the air section and then enters the treatment room straight-through section, and finally the modulated beam is guided into terminals with different angles through the treatment room straight-through section.
2. A 360 ° superconducting rotary beam line according to claim 1, wherein the extraction distribution section comprises an envelope and dispersion modulating quadrupole lens set, a guiding magnet and an envelope modulating quadrupole lens set connected in series;
wherein the envelope and dispersion modulation quadrupole lens group is configured and adapted to simultaneously envelope and dispersion modulate a beam from a preceding accelerator and then introduce the beam into the guide magnet, the guide magnet is configured and adapted to introduce the beam downstream in a predetermined direction into the envelope modulation quadrupole lens group, and the envelope modulation quadrupole lens group is configured and adapted to envelope modulate the beam from the guide magnet again.
3. The 360 ° superconducting rotary beam line of claim 2, wherein the envelope and dispersion modulating quadrupole lens set comprises three first defocusing quadrupole lenses and three first focusing quadrupole lenses, and the three defocusing quadrupole lenses and the three focusing quadrupole lenses are alternately arranged along the beam direction, and the three defocusing quadrupole lenses and the three focusing quadrupole lenses together with the guiding magnet form a reverse dispersion-eliminating structure to eliminate the dispersion introduced when the beam is extracted from the front accelerator.
4. The 360 ° superconducting rotating beam line according to claim 2, wherein the envelope modulation quadrupole lens set comprises two second focusing Jiao Siji lenses and two second defocusing quadrupole lenses, and the two focusing quadrupole lenses and the two defocusing quadrupole lenses are alternately arranged along the beam direction, and the two focusing quadrupole lenses and the two defocusing quadrupole lenses are used for matching the twiss parameters of the beam at the entrance of the superconducting rotating section when the superconducting rotating section is located at different azimuth angles, and simultaneously considering the envelope modulation of the beam along the way.
5. A 360 ° superconducting rotary beam line according to claim 2, wherein the superconducting rotary section comprises:
the rotating section guiding magnet group consists of a 90-degree superconducting diode magnet beam based on CCT coil technology and five superconducting quadrupole lenses embedded in the 90-degree superconducting diode magnet beam, wherein the 90-degree superconducting diode magnet beam and the five superconducting quadrupole lenses optically form a complete right symmetrical achromatic joint together, and the 90-degree superconducting diode magnet beam and the five superconducting quadrupole lenses are used for carrying out envelope and chromatic dispersion modulation on the beam current from the leading-out distribution section at the same time and deflecting for 90 degrees;
and the bidirectional scanning magnet group is arranged at the downstream of the rotating section guiding magnet group and is connected with the rotating section guiding magnet group through a vacuum pipeline, and the bidirectional scanning magnet group is used for calibrating the transverse position of a target point of the modulated beam current.
6. A 360 ° superconducting rotary beam line according to claim 1, wherein the rotary support comprises a first support ring, a second support ring and a drive ring which are coaxially arranged and sequentially connected through a connecting rod, and a driving mechanism connected with the drive ring, the first support ring and the second support ring have the same diameter, and the diameter of the drive ring is smaller than that of the second support ring.
7. The 360 ° superconducting rotary beam line of claim 6, wherein the rotary support further comprises a counterweight connected to the first support ring, the second support ring, and the superconducting rotary section by connectors to ensure dynamic balance of the system.
8. A360 ° superconducting rotary beam line according to claim 6, wherein the driving mechanism comprises a worm gear and a worm screw, the worm gear is assembled on the driving ring, and the worm screw is in gear joint with the worm gear.
9. A 360 ° superconducting rotary beam line according to any of claims 1 to 8, wherein a double titanium alloy vacuum window is used to separate the superconducting rotary section from the treatment room straight-through section.
10. A 360 ° superconducting rotary beam line according to any one of claims 1 to 8, wherein the rotation point between the extraction and distribution section and the superconducting rotary section is connected by a magnetic fluid sealing device.
Priority Applications (1)
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Cited By (1)
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| CN116020062A (en) * | 2023-01-13 | 2023-04-28 | 兰州科近泰基新技术有限责任公司 | Treatment terminal based on rotary beam line |
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| CN116020062B (en) * | 2023-01-13 | 2023-09-29 | 兰州科近泰基新技术有限责任公司 | Treatment terminal based on rotary beam line |
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