Beam dynamics study and design of 348 degrees compression magnet for neutron time of flight (n-TOF) facility

A n-TOF experiment requires 1 nsec duration pulses to get better energy resolution. The paper presents the design of a compression magnet that can compress a 10 nsec electron pulse to similar to 1 nsec having energy variation from 18-30 MeV. A zero gradient, 5-sector magnet that will bend the beam through 348 degrees is designed for the same. The beam dynamics to calculate energy spread, design of sector magnet and the simulation results of CST particle studio are presented. A combination of magnetic fields 0.1 T, 0.05 T and 0.02 T in different sectors of the magnet give the compressed pulse width of similar to 1.3 nsec.