title: Phase-retardation and full-polarization analysis of soft-x-ray synchrotron radiation close to the carbon K edge by use of a multilayer transmission filter.
abstract: We have produced a multilayer transmission filter with 100 periods of Cr/C to achieve a significant phase retardation while maintaining good transmission for photon energies just below the carbon K edge. This device was installed into a polarimeter behind the SX700/3 monochromator at the Berlin synchrotron radiation laboratory, BESSY. The phase-retardation properties were observed as theoretically predicted. Agreement between experiment and calculation could be obtained by introduction of a rather small interface roughness in the simulation code (σ = 0.65 nm rms). An observed phase retardation of 5° was sufficient to permit, for the first time we believe, a complete and unambiguous polarization analysis of soft-x-ray synchrotron radiation (265-eV photon energy) with primary standards.
authors.forename: S D
authors.initials: SD
authors.lastname: Fonzo
authors.forename: W
authors.initials: W
authors.lastname: Jark
authors.forename: F
authors.initials: F
authors.lastname: Schäfers
authors.forename: H
authors.initials: H
authors.lastname: Petersen
authors.forename: A
authors.initials: A
authors.lastname: Gaupp
authors.forename: J H
authors.initials: JH
authors.lastname: Underwood