Fast Exchange Refrigerator for Neutron Science (FERNS)

72699 Next-generation high flux neutron sources, such as the Spallation Neutron Source at Oak Ridge National Lab., will allow faster-than-ever data collection rates. Present generation of neutron sample environment equipment (cryostats, furnaces, etc.) lacks the automation features needed to handle the high demand by non-expert users for rapid experiments, and frequent sample changes. This project will develop and deliver an advanced automated, programmable sample handling system for use in cryogenic sample environments for neutron research. The approach is to integrate state-of-the-art cryogenic and computer-controlled automation technologies to create the ¿Fast Exchange Refrigerator for Neutron Sciences¿ specifically designed to increase experimental throughput in the next-generation neutron user facilities. The new facility is targeted to high flux beamlines that will enable investigation of a large number of samples to provide high accuracy data on a wide range of sample types. In Phase I, instrument requirements were determined in discussion with users, a breadboard instrument, control software and sample holders were constructed. The system was tested using a cryostat, test samples were exchanged in less than 1 minute. Cool-down tests indicate that pre-cooling of samples is not required to achieve fast turnaround. Results were analyzed and the Phase II design was drafted based on evaluation of requirements and findings. Design parameters will be fixed, a prototype instrument will be constructed and fully documented, software will be prepared for use with ethernet-based control, simple, inexpensive sample encapsulation will be developed, the instrument will be delivered, tested and installed at the POWGEN beamline at SNS mid-second year. Instrument specifications and commercial product design will be prepared for sale of instrument in Phase III. Commercial Applications and Other Benefits as described by awardee: The proposed instrument directly addresses a need for emerging neutron scattering facilities where there is a market for integrated partially automated facilities. In addition to the target market in neutron instrumentation, a modified version of the instrument will serve markets in X-ray diffraction at facilities such as APS.