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Accession Number
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DE2012-1045813
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Title
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Characterization of Slow Orbit Motion in SPEAR3.
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Publication Date
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2012
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Media Count
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3p
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Personal Author
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G. Gassner J. Safranek N. Sunilkumar Y. Yan
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Abstract
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SPEAR3 is a third-generation synchrotron light source storage ring. The beam stability requirements are approx. 10% of the beam size, which is about 1 micron in the vertical plane. Hydrostatic level system (HLS) measurements show that the height of the SPEAR3 tunnel floor varies by tens of microns daily. We present analysis of the HLS data, including accounting for common-mode tidal motion. We discuss the results of experiments done to determine the primary driving source of ground motion. We painted the accelerator tunnel walls white; we temporarily installed Mylar over the asphalt in the center of the accelerator; and we put Mylar over a section of the tunnel walls.
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Keywords
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Accelerators
Ambient temperature
Asphalts
Blowers
Concrete blocks
Electron beams
Fluctuations
Ground motion
Hydrostatics
Light sources
Mylar
Photon beams
Roofs
Shields
Spear
Stability
Storage rings
Synchrotons
Synchrotron radiation
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Source Agency
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Technical Information Center Oak Ridge Tennessee
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NTIS Subject Category
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46 - Physics
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Corporate Author
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Stanford Linear Accelerator Center, CA.
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Document Type
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Technical report
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Title Note
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N/A
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NTIS Issue Number
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1226
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Contract Number
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DE-AC02-76SF00515
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