A high-temperature superconducting quadrupole magnet structure suitable for particle medical delivery technology

Abstract

The invention discloses a high-temperature superconducting quadrupole magnet structure suitable for particle medical transportation technology, which includes a yttrium-barium-copper-oxygen high-temperature superconducting coil, a low-temperature conduction cooling structure, a coil connection joint design, and vacuum insulation outside the iron core and the coil Structural and epoxy board support assembly. The yttrium barium copper oxide strip is embedded in the groove of the coil base. The high temperature superconducting coils of the magnet are connected in series. The high-temperature superconducting joint is connected by indium sheet compression. The coils are conduction cooled by a cryocooler. The iron core and the coil are also equipped with a cold screen and a Dewar as a vacuum insulation structure. The magnet inner core assembly and cold shield are fixed by epoxy plate support assembly. The invention can realize the focusing function of the particle beam in the particle transport system, and effectively reduce the size, weight and cost of the magnet. The invention satisfies the requirements of low-temperature conduction cooling, structural strength, heat leakage reduction and quench protection when the superconducting coil operates stably in the 40K temperature range, and realizes miniaturization, light weight and low cost of the magnet structure.

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...

AI Technical Summary

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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