The morning was a preliminary design review of concepts for goniometer hardware for single crystal manipulation. Two concepts were presented. The first was an insertion device designed by Robert Chave Applied Physics, which would provide two axes of tilt for a sample cooled by a displex refrigerator. The plan was to construct this low-cost unit and use it on Pharos at Los Alamos to gain experience before a three axis system would be built for ARCS.

The second concept was a permanent fixture for the top of the ARCS vacuum tank. It would provide a sample-mounting flange that had tilt and rotate capabilities. A hexapod actuator would provide the degrees of freedom, and the unit would require a vacuum bellows and rotating feedthrough for through-vacuum motion. Ideas for this unit were presented by Robb Williams.

The afternoon was an ARCS IDT meeting to settle some issues before the EFAC review on Oct. 9. Hardware issues included presentations on results from shielding calculations and the plan for evaluating detector and electronics operation in vacuum. Software issues included presenting the plan to the IDT for data analysis as a web service. Management issues included a discussion of the Project Execution Plan, milestones, and the present and future role of the ARCS IDT.