Enhancement of the vibration stability of a microdiffraction goniometer

Soon-Hong Lee; Curt Preissner; Barry P. Lai; Zhonghou Cai; Deming Shu

doi:10.1117/12.482150

9 September 2002 Enhancement of the vibration stability of a microdiffraction goniometer

Soon-Hong Lee, Curt Preissner, Barry P. Lai, Zhonghou Cai, Deming Shu

Proceedings Volume 4771, Optomechanical Design and Engineering 2002; (2002) https://doi.org/10.1117/12.482150
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

Abstract

High-precision instrumentation, such as that for x-ray diffraction, electron microscopy, scanning probe microscopy, and other optical micropositioning systems, requires the stability that comes from vibration-isolated support structures. Structure-born vibrations impede the acquisition of accurate experimental data through such high-precision instruments. At the Advanced Photon Source, a multiaxis goniometer is installed in the 2-ID-D station for synchrotron microdiffraction investigations. However, ground vibration can excite the kinematic movements of the goniometer linkages, resulting in critically contaminated experimental data. In this paper, the vibration behavior of the goniometer has been considered. Experimental vibration measurements were conducted to define the present vibration levels and determine the threshold sensitivity of the equipment. In addition, experimental modal tests were conducted and used to guide an analytical finite element analysis. Both results were used for finding the best way to reduce the vibration levels and to develop a vibration damping / isolation structure for the 2-ID-D goniometer. The device that was designed and tested could be used to reduce local vibration levels for the vibration isolation of similar high-precision instruments.

Citation Download Citation

Soon-Hong Lee, Curt Preissner, Barry P. Lai, Zhonghou Cai, and Deming Shu "Enhancement of the vibration stability of a microdiffraction goniometer", Proc. SPIE 4771, Optomechanical Design and Engineering 2002, (9 September 2002); https://doi.org/10.1117/12.482150

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