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PHOTO-NEUTRON SOURCE USING 2 GEV ELECTRON LINAC FOR RADIATION SHIELDING RESEARCH
Lee, Hee-Seock,Bak, Jooshik,Chung, Chinwha,Ban, Syuichi,Shin, Kazuo,Tatsuhiko, Sato 대한방사선 방어학회 2001 방사선방어학회지 Vol.26 No.3
The 2 GeV electron linac, the injector of the Pohang Light Source, was used as a photo-neutron source for radiation shielding research. The operational beam parameters are the nominal electron intensity of 0.5∼5 nC/sec, the repetition rate of 10 Hz, and the beam pulse length of 1.0 nsec. One electron beam line was modified in order to install the target systems for producing pulsed photo-neutrons. The neutron spectrum and intensity were investigated by the time-of-flight technique. The reliable maximum energy of the measured neutrons was about 500 MeV. The number of neutrons above 20 MeV produced by one 1 GeV electron in a thick Pb target was about 6.45 × 10-4 /sr at 90 degrees to the beam axis. The status of the photo-neutron source and the application research are presented.