Improving Beam Commissioning by Fast Computation of Magnetic Field of Accelerator Magnets Considering Magnetic Hysteresis

In accelerator systems, fast magnetic field analysis incorporating the effect of magnetic hysteresis is essential for achieving high efficiency and accuracy in beam commissioning using electromagnets. In this paper, the fast magnetic field computation method with macroscopic play model is proposed. It is constructed by re-identifying the shape functions from the currents and magnetic multipole components characteristics obtained from a conventional finite element method incorporating the DC hysteresis effects. As a result of the examination, we verified that the proposed method accelerated the magnetic field computation, which was fast and accurate enough for beam commissioning.