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Figure 10
For these measurements the SLS power is essentially turned off (except linac and sublimation pumps, controls sensors and computers). Top panel: mechanical noise, along the vertical axis measured with a seismic sensor placed on the bending magnet. Middle and bottom panels: vertical and horizontal normalized optical noise power density, respectively, measured with a 4Q sensor near a focal point, using a laser beam aligned through the main optical axis of the beamline.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 19| Part 1| January 2012| Pages 1-9
https://doi.org/10.1107/S0909049511041884
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