@inproceedings{8f7998d3d7e349d28fe5e3307049463b,
title = "Status of the twin helical undulator soft X-ray beamline at SPring-8: Performance for circular dichroism measurements",
abstract = "The status of the soft x-ray beamline BL25SU at SPring-8 is reported. The beamline performance for circular dichroism measurements using the helicity switching of helical undulator radiation is focused on. Light spots on a sample of the opposite helicities have been observed with a photoelectron emission microscope. The vertical profiles of the spots have almost the same line shape and a positional difference of ∼ 0.5 μm. The horizontal spot positions coincide, but the horizontal spot widths are different by ∼ 7 %. The energy difference of the monochromatized light between the opposite helicities has been estimated to be less than or comparable to 1 meV in the Ne 1s absorption region. The kick angle of the kicker magnets has been increased from 0.2 to 0.3 mrad to avoid penetration of the higher harmonics.",
keywords = "Circular dichroism., Helicity switching, Soft x-ray beamline, Twin helical undulators",
author = "T. Muro and T. Nakamura and T. Matsushita and T. Wakita and K. Fukumoto and H. Kimura and T. Hirono and T. Kinoshita and T. Hara and K. Shirasawa and M. Takeuchi and H. Kitamura",
year = "2007",
doi = "10.1063/1.2436125",
language = "English",
isbn = "0735403732",
series = "AIP Conference Proceedings",
pages = "571--574",
booktitle = "SYNCHROTRON RADIATION INSTRUMENTATION",
note = "SYNCHROTRON RADIATION INSTRUMENTATION: 9th International Conference on Synchrotron Radiation Instrumentation ; Conference date: 28-05-2006 Through 28-06-2006",
}