A magnetic field generation method and synchrotron

Abstract

An embodiment of the present application provides a magnetic field generation method and a synchrotron, the magnetic field generation method includes: taking the remanence of the N-1th acceleration process as the magnetic field reference value of the Nth acceleration process, and determining the corresponding displacement function, wherein, N is a positive integer greater than 1; according to the remanence of the N-1th acceleration process and the set magnetic field curve of the Nth acceleration process, using the displacement function corresponding to the Nth acceleration process, the first The rising branch of the hysteresis loop of the N-1 acceleration process is corrected to obtain the rising branch of the hysteresis loop of the Nth acceleration process; according to the rising branch of the hysteresis loop of the Nth acceleration process, the Nth The set magnetic field curve in the secondary acceleration process is converted into a set current curve; based on the set current curve, the magnet is controlled to generate a magnetic field. In this way, the hysteresis error can be eliminated, the reset time of the magnet can be shortened, and the efficiency of the synchrotron can be improved.

Description

technical field [0001] The present application relates to the field of nuclear technology, in particular to a method for generating a magnetic field and a synchrotron. Background technique [0002] Synchrotron (Synchrotron) is a device that makes charged particles move along a fixed circular orbit in a high vacuum under the control of a magnetic field force, and is continuously accelerated (energy-lifted) by an electric field force to reach high energy. Many applications of synchrotrons require particle beams of different energies. For example, in clinical medicine, synchrotrons control the position of the Bragg peak in the human body by changing the energy of particle beams multiple times, so as to achieve accurate coverage of the lesion without damage. For the purpose of surrounding normal tissues, this requires the synchrotron to be able to precisely control the position and energy of the particle beam, which is currently mainly achieved by continuously changing different...

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