Speaker
Description
The Nuclear Data Production System (NDPS) which is a neutron time-of-flight (TOF) experimental facility of RAON is under construction. The proton and deuteron beams are accelerated up to 83 and 98 MeV, respectively. The proton beams bombarded with a thin Li target will produce mono-energetic neutrons, and continuous-energy neutron spectra will be generated by colliding deuteron beams to a thick C target. To monitor the neutron flux we developed neutron monitoring detectors based MICROMEGAS and PPAC. In order to convert neutrons to charged particles, Thorium converters of 6 cm diameter are installed. The electrodeposition method was used with isopropyl alcohol as a solvent to dissolve thorium nitrate powder. The amount of deposited Th was measured by using alpha spectroscopy. These neutron monitoring detectors were tested with a $^{252}$Cf neutron source. The test results of these two monitoring detectors will be presented.