Superconducting bipolar magnet structure, conveying device and medical equipment

Abstract

A superconducting bipolar magnet structure comprises a coil box, dewar and a supporting device, wherein the coil box is of an integrated structure, and opposite superconducting coils are arranged inside the coil box so that a uniform bipolar magnetic field can be generated after the two superconducting coils are electrified; the supporting device is fixed to the dewar, and the coil box is supported in a point contact mode. The special supporting and heat insulating structure can guarantee cooling of magnet coils, the stable high-intensity uniform magnetic field is generated in an ion beam conveying area, the deflection function of particle beams in particle medical equipment can be achieved, and the structure has the effects of enhancing the internal magnetic field and reducing the size and weight of a magnet; meanwhile, the requirements for low-temperature cooling, quench protection and the like during operation of the superconducting magnet can be met.

Description

technical field [0001] The disclosure belongs to the field of superconducting magnets, and in particular relates to a superconducting dipole magnet structure, a particle transport device, and a medical device. 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 particle beams; particle beams have a Bragg peak, which can be adjusted to the tumor area through high-precision computer control technology, and Release a lot of energy. After more than half a century of development, particle therapy has become an eye-catching high-tech tumor treatment due to its strong penetrating power, good dose distribution, and less side scattering. While particle medical technology continues to develop, heavy ion medical technology is also developing. As far as beam types are concerned, heavy ions, especially carbon ions, are the first choice because of their physical B...

AI Technical Summary

Problems solved by technology

And with the rapid development of accelerator science, conventional magnet accelerators have been difficult to meet the desire of various disciplines for high-energy particle beams

Since the transport of heavy ions and particles has high requirements on magnetic stiffness, the magnetic stiffness required for deflecting heavy ions is 6.3T· · m, the particle is 2.15T· · m, so that the design difficulty of the magnet in the particle beam transportation process will also increase. This is mainly because the conventional electromagnetic field is difficult to achieve such a large size. Only by increasing the size of the magnet to meet the requirements, this makes the existing transportation system Great overall size and weight

Since the conventional electromagnetic field is difficult to achieve such a large size, the only way to meet the requirements is to expand the radius of curvature, which makes the existing frame structure bulky and heavy; especially the last piece of bending magnet, whose bending angle reaches 90 degrees, the increase of the radius makes The tonnage is extremely increased, taking the HIT of GSI in Germany as an example, the last piece of 90-degree bending magnet reached 90 tons, accounting for 65% of the entire rotary transmission system

Overweight frame structure will lead to severe uneven force and deformation, which will affect the isocenter error and rotation accuracy, hindering the wide application of ion beam medicine

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