Proton synchrotron for treatment

Abstract

The invention relates to a proton synchrotron for treatment, which comprises two deflecting dipole magnets connected by two straight sections to form a ring structure. The straight sections include horizontal focusing and horizontal defocusing quadrupole and hexapole combined magnets. According to the invention, a small number of deflecting dipole magnets are combined with the horizontal focusingor defocusing quadrupole magnets controlling operating points, a full-loop envelope function is controlled to a small level, the acceptance of the synchrotron and the number of proton storage are effectively improved, the proton utilization rate and the duty cycle are increased and the treatment time is shortened; and in addition, the structure is very compact, unnecessary gaps and magnet elementsare reduced, the functions of a medical accelerator are realized with as few elements as possible, the space occupied by the synchrotron is reduced and the construction cost and treatment cost are further lowered.

Description

technical field [0001] The invention relates to the field of synchrotrons for tumor treatment, in particular to a proton synchrotron for treatment. Background technique [0002] The excellent Bragg peak characteristics of proton in the depth direction make it one of the most advanced methods in tumor treatment. At present, there are more and more proton therapy devices and treatment centers in the world. The proton cancer treatment accelerators currently in operation and under construction are mainly cyclotrons and synchrotrons. [0003] The cyclotron can provide a stable continuous beam, and its beam cutting and opening speed is very fast, which can meet the requirements of respiratory gating. However, the energy change of the cyclotron depends on the mechanical device placed on the high-energy line—the energy reducer, which reduces the energy of the beam by scattering; its advantage is that the energy can be adjusted quickly, and the energy change speed can be changed in ...

AI Technical Summary

Problems solved by technology

However, the design of this accelerator has the following disadvantages: First, it is relatively complicated, using 8 deflecting dipole magnets and 12 focusing and defocusing quadrupole magnets, and the increase of components means the decline of reliability; second, the structure is not compact enough , the gap between components becomes a waste; the third is that the energy consumption is high, and the magnet is a high-power device, and a lot of energy is wasted in the cycle of energy-up and down-energy; the fourth is that the envelope function is still large, so the space charge effect Larger, resulting in less particle storage

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