High-temperature superconduction four-pole magnet structure applicable to particle medical transportation technology

Abstract

The invention discloses a high-temperature superconduction four-pole magnet structure applicable to a particle medical transportation technology. The high-temperature superconduction four-pole magnetstructure comprises a yttrium barium copper oxide high-temperature superconduction coil, a low-temperature conduction cooling structure, a coil connector design, an iron core and coil external vacuumheat insulation structure and an epoxy plate support assembly, wherein a yttrium barium copper oxide strip is embedded into a coil matrix groove, each high-temperature superconduction coil of the magnet is connected in series, the high-temperature superconduction connector is pressed and connected by an indium sheet, the coil is conducted and cooled by a refrigerating machine, a cold screen and atile are further arranged outside the iron core and the coil and are used as the vacuum heat insulation structure, and an iron core assembly in the magnet and the cold screen are fixed by the epoxy plate support assembly. By the high-temperature superconduction four-pole magnet structure, the focusing function of particle beams in a particle transportation system can be achieved, and the size, theweight and the cost of the magnet are effectively reduced; and the requirements such as low-temperature conduction cooling, structural strength, leakage heat reduction and quench protection of a superconduction wire stably running at a temperature zone of 40K are met, and the miniaturization, the lightness and the low cost of the magnet structure are achieved.

Description

technical field [0001] The invention relates to a high-temperature superconducting multipole magnet structure in the technical field of high-temperature superconductivity, in particular to a high-temperature superconducting quadrupole magnet structure suitable for particle medical transportation technology. Background technique [0002] The development of medical technology of particle beams began in 1946 when Wilson in the United States first proposed the therapeutic properties of proton beams; due to its Bragg peak (Bragg peak) effect, the dose value at the end of the range is three times greater than the dose value at the entrance. Four times, the dose after the end of the range is equal to zero. This characteristic of proton beams is used for tumor treatment, which can make the dose at the tumor the maximum and obtain the maximum therapeutic effect, and the normal somatic cells behind the tumor will not be damaged. The normal tissue cells in the front are only slightly d...

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Problems solved by technology

The role of the particle transport system is to ensure the unobstructed transmission of the particle beam in the vacuum pipeline. During the transmission process, a dipole iron is required to deflect the particle beam, and a quadrupole iron is used to focus the particle beam. A complete transport line device consists of The number of dipole irons and quadrupole irons is dozens of sets or more. Since the transport of heavy ions and protons has high requirements on the strength of the magnetic field, the difficulty in designing the magnets during the transport of particle beams will also increase. This is mainly because the magnetic field strength of conventional electromagnets will be seriously saturated after increasing to a certain extent, and the magnetic field strength can only be increased by further increasing the excitation ampere-turns of the coil, but in this magnetic saturation The direct effect of the increase of the coil after the effect is that the size and weight of the magnet itself will increase significantly, which will make the overall footprint and weight of the entire transportation system large, and the cost will also increase significantly

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