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Initial testing of a Compact Crystal Positioning System for the TOPAZ Single-Crystal Diffractometer at the Spallation Neutron...

Publication Type
Journal
Journal Name
Journal of Physics: Conference Series
Publication Date
Volume
251

A precise, versatile, and automated method of orienting a sub-millimeter crystal
in a focused neutron beam is required for efficient operation of the TOPAZ Single Crystal
Diffractometer at the Spallation Neutron Source at Oak Ridge National Laboratory. To fulfill
this need, a Compact Crystal Positioning System (CCPS) has been developed in collaboration
with Square One Systems Design in Jackson, Wyoming. The system incorporates a tripod
design with six vacuum-compatible piezoelectric linear motors capable of < 1µm resolution.
National Instruments LabVIEW provides a means of system automation while at the same
time accommodating the modular nature of the SNS sample environment control software
for straightforward system integration. Initial results in a cryogenic test environment will be
presented, as well as results from ambient tests performed at the Advanced Photon Source at
Argonne National Laboratory.