A nanosecond proton bunching system has been constructed at Korea Institute of Geoscience and Mineral Resources (KIGAM). This
pulsed ion beam will be converted into corresponding duration of neutron pulse, which can reduce the scattered neutron background
during neutron spectroscopy. The pulsed beam is obtained by deflection and double bunching by RF field. RF fields are applied
to deflection and bunching electrodes as 2 kV p-p, 4 MHz and 2 kV p-p, 8 MHz, respectively. A push-pull RF amplifier has been
designed and constructed with a maximum output power of 300 W continuous wave (CW) between 2 and 30 MHz. The main parameters
of bunching beam were as follows: 8 MHz repetition rate, 2 ns FWHM, approximately 20% of duty factor and the maximum energy
spread of 2 keV within a pulse.