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- W1617296483 abstract "The synchrotron radiation beamline at the PETRA storage ring at DESY with two end stations uses a 4 m‐long undulator delivering hard X‐ray photons up to 300 keV at a storage ring energy of 12 GeV. The spatial photon intensity distribution at the first undulator harmonic (21.23 keV) was used to determine the horizontal emittance of the storage ring. The set‐up installed at 107.7 m from the source point consists of a vacuum chamber with a cryogenically cooled silicon crystal in Laue geometry. The monochromatized radiation is converted to visible light by a fluorescent screen on the back of an aluminum plate and observed by a digital camera. Gaussian fits to horizontal lines through the centre of mass of the images provide the standard deviations of the measured intensity distributions in the horizontal plane. The corresponding emittance values were derived by modeling the whole setup with the SPECTRA code using the emittance as a free parameter and by using machine physics formulas neglecting photon source size effects." @default.
- W1617296483 created "2016-06-24" @default.
- W1617296483 creator A5027321702 @default.
- W1617296483 date "2004-01-01" @default.
- W1617296483 modified "2023-09-25" @default.
- W1617296483 title "Crystal Monochromator based Emittance Measurements at the PETRA Undulator Beamline" @default.
- W1617296483 doi "https://doi.org/10.1063/1.1757851" @default.
- W1617296483 hasPublicationYear "2004" @default.
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