Superconducting ion annular synchrotron

Abstract

The invention relates to a superconducting ion annular synchrotron which comprises four deflection units, four focusing units, a set of single-circle injection system and a set of slow extraction system. The four deflection units are arranged in a central symmetry mode and form a quadrangle, and all the deflection units are connected through annular vacuum pipelines to form four linear sections. The four focusing units are respectively arranged on the four linear sections; the single-circle injection system comprises an injection cutter arranged on the first straight section; an injection impact magnet disposed at a position where the injection beam intersects with the second linear section; the slow lead-out system comprises a transverse excitation element arranged on any section of linear section; the leading-out static cutter and the leading-out cutting magnet are both arranged on the third straight line section, and the leading-out cutting magnet is located on the downstream of the leading-out static cutter; and the lead-out cutting magnet is arranged on a fourth straight line. According to the invention, the size of an existing medical synchrotron can be greatly reduced, and meanwhile, ion beams with high intensity and good uniformity are provided for a terminal.

Description

technical field [0001] The invention relates to a circular synchrotron, in particular to a superconducting ion circular synchrotron whose magnetic focusing system is a FODO structure and adopts single-circle injection and third-order resonance extraction. Background technique [0002] The sharp Bragg peak characteristics of ions in the depth direction, online energy density, and relative biological advantages make it one of the most advanced and effective tumor treatment methods. In ion therapy, the use of synchrotron circular accelerators can flexibly change the energy of the outgoing particle beam, and then adjust the range of the particle beam in the patient's body. By properly adjusting the magnetic field strength of the magnet element, the beam can be manipulated, and the third-order resonance can be slowly extracted. Evenly extract the particle beam in the ring. However, the synchrotron circular accelerator consists of a large number of equipment, occupies a large area...

AI Technical Summary

Problems solved by technology

[0006] However, what this accelerator uses is a conventional dipole magnet (e1), and the highest field strength that can be achieved is about 1.6T, and the dipole iron and quadrupole iron are installed independently, so the circumference of the synchronous ring is longer; and it uses The number of quadrupole magnets and convex rail magnets are large, so there is a limit to the miniaturization of the synchrotron

In addition, the extracted beam is deflected by the extracted electrostatic cutter (e5) and continues to travel to the outside of the ring, and is drawn out by the cutting magnet after passing through the dipole iron. Increases the cost and is not conducive to the unified manufacture of accelerator magnets

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