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Figure 2
(Top) A Keyence laser device measures the runout of the air-bearing rotation stage as it reflects from a calibrated polished steel sphere (Bal-tek, Los Angeles, CA; http://www.precisionballs.com/ ). (Bottom) Radial runout of the stepper stage with encoders. The runout determined by this set-up over two full revolutions is ±1 m.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
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