The Low Energy Neutron Source- Status and Prospects

The Low Energy Neutron Source (LENS) at Indiana University uses a novel design for a neutron source that is suitable for operation on a university or industrial scale. The source is based on (p,nx) reactions in Be and it will operate in a long-pulse mode with a cryogenic moderator optimized for long-wavelength performance. It is being constructed to fulfill a three-fold mission of conducting materials research, educating the next generation of neutron scientists, and investigating new ideas in neutron instrumentation. LENS produced its first neutrons on 15 Dec. 2004, several months ahead of schedule, and is now embarking on a multi-year program of accelerator and power upgrades. Activities at the source have included spectral measurements from both room-temperature polyethylene and cryogenic methane moderators. The cryogenic system is capable of cooling the methane to temperatures as low as 3.6K. Tests of neutron radiation effects in transistors have also been conducted.