Tests of nanometer-class structural actuators at 30 and 300 degrees Kelvin

Details Tests of nanometer-class structural actuators at 30 and 300 degrees Kelvin Tests of nanometer-class structural actuators at 30 and 300 degrees Kelvin

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004spie.5495..292h&link_type=abstract

Astronomical Structures and Mechanisms Technology. Edited by Antebi, Joseph; Lemke, Dietrich. Proceedings of the SPIE, Volume 54

Computer Science

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Scientific paper

The authors have completed testing of a new class of structural actuators that demonstrate nanometer precision. The actuators can also incorporate a coarse stage for removal of several-millimeter-sized position errors (as in deployment errors of mirror segments in space or assembly errors and gravitational deflections in terrestrial instruments). One of the promises of these actuators has been performance at both room temperature (300°K) and cryogenic temperatures (30° K). The recent tests performed at both temperatures show that the behavior is nearly identical at both extremes. The paper will discuss the test methods and procedures as well as presenting the test results and some of the lessons learned in making nanometer-sized measurements at these temperature extremes.

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