Application of wavelength shifting fiber to subcriticality measurements

Static and kinetic experiments on an accelerator-driven system have been conducted at the Kyoto University Critical Assembly. A small neutron detector using wavelength shifting fiber that can be inserted into a narrow space has been developed for measuring static and kinetic parameters. This study has found that the new detector type can be applied to kinetic experiments such as subcriticality measurements with the use of a D-T pulsed neutron source.