Application of FLUKA in Simulation of Radiation-Induced Demagnetization Experiment of Permanent Magnet

Monte-Carlo simulation of the radiation-induced demagnetization experiment system with 2.5 GeV electron linear accelerator at Korea Pohang Accelerator Laboratory (PAL) was carried out with FLUKA code. The spectra of various particles, including photon, electron, neutron and proton, and spatial distribution of fluence were derived. Furthermore the absorbed dose rate and 1 MeV equivalent neutron fluence of permanent magnet were estimated as 18.7 Gy/s and 6.37×10⁷ cm^-2•s^-1 according to the beam intensity in the experiment.