An ultra fast, radiation-resistant fast neutron detector.

ABSTRACT

This paper describes a study on 14-MeV neutron detection based on the combination of a parallel plate avalanche chamber with a sheet of polypropylene as fast neutron-to-charged-particle converter. By employing a carefully shielded chamber, neutron-induced charged particles background from the chamber body was successfully reduced to <6 x 10(-5) count per incident neutron. Fast signals, with approximately 7 ns pulse width were observed. The obtained detection efficiency is 0.15%.