Inner injection type superconducting cyclotron central area split and layered type magnet plug block structure

Abstract

The invention discloses an inner injection type superconducting cyclotron central area split and layered type magnet plug block structure. The magnet plug block structure comprises an upper magnet structure and a lower magnet structure, wherein the upper magnet structure and the lower magnet structure are in mirror symmetry with respect to a midplane. The lower magnet structure comprises a magnetbody lower main body. The upper magnet structure comprises a magnet body upper main body. The magnet body lower main body is equipped with magnet positioning pins, a magnet body lower branch body, positioning pin plug screws and bolts. Under the premise of taking into account installation and operation of a magnetic measurement system and an ion source, the magnet structure can be in mirror symmetry with respect to the midplane, thereby providing a suitable Bump magnetic field for a central area, enhancing axial focusing of particles and reducing beam loss rate. The structure can realize fastand accurate installation and disassembly, has high repeated positioning accuracy, and provides great convenience for magnetic field testing and adjustment and replacement of an ion source head.

Description

technical field [0001] The invention relates to a magnet block structure, in particular to an inner-injected superconducting cyclotron central partition layered magnet block structure, which belongs to the application field of superconducting cyclotrons. Background technique [0002] In a superconducting cyclotron, the axial focusing of particles is provided by the degree of modulation of the magnetic field and the helix angle. In the central region, the modulation degree and the helix angle are small, which is not enough to provide sufficient axial focus, and the focus compensation provided by the electric field and the convex magnetic field (Bump magnetic field) is required. Among them, the bump magnetic field can be constructed through some special magnet structures, but the magnet structure that meets the requirements of the bump magnetic field is difficult to ensure the installation requirements of the Bz magnetic measurement system and the ion source at the same time, ...

AI Technical Summary

Problems solved by technology

Among them, the bump magnetic field can be constructed through some special magnet structures, but the magnet structure that meets the requirements of the bump magnetic field is difficult to ensure the installation requirements of the Bz magnetic measurement system and the ion source at the same time, and frequent installation and disassembly are involved in the magnetic measurement process Therefore, it is very necessary to design a separate magnet structure that meets the requirements of the Bump magnetic field and can take into account the installation of the magnetic measurement system and the ion source.

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