Open AccessResearch on the effect of magnet parameters on the isochronous field of a superconducting cyclotron
Author(s) -
Pengyan Zhou,
Kaizhong Ding,
Junjun Li,
Shiwen Xu,
Yuntao Song
Publication year - 2019
Publication title -
nuclear technology and radiation protection
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.31
H-Index - 16
eISSN - 1452-8185
pISSN - 1451-3994
DOI - 10.2298/ntrp190130025z
Subject(s) - magnet , electromagnetic coil , cyclotron , superconducting magnet , magnetic field , physics , superconductivity , azimuth , oscillation (cell signaling) , superconducting wire , condensed matter physics , nuclear magnetic resonance , optics , quantum mechanics , biology , genetics
It is a complicated task to obtain an isochronous field of a cyclotron magnet. Due to non-linear property of iron, iterated simulation of magnet design takes a long time to get an isochronous field. As an example, for a magnet design of a 240 MeV (SC240) superconducting cyclotron, the effect of main parameters of a magnet system on the magnetic field was studied, among them the azimuthal sector width, the spiral sector angle, the gap between sectors, the depth of valley region, the position of the coil, the shape of the coil and the excited current of the superconducting coil. It was found that the azimuthal average magnetic field can be increased by any of the following methods, including enlarging azimuthal width, increasing excited current of the superconducting coil, narrowing of the gap between sectors, reducing the depth of the valley region or decreasing the distance between the coil and the mid-plane. In addition, axial oscillation frequency can be improved by increasing the spiral angle, the depth of the valley region, or decreasing the gap between sectors.