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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 {approx} 0.5 {mu}m. The horizontal spot positions coincide, but the horizontal spot widths are different by {approx} 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.

Authors:
; ; ; ; ; ; ;  [1];  [2]; ;  [3];  [4];  [3]
  1. JASRI/SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198 (Japan)
  2. Faculty of Science, Okayama University, 3-1-1 Tsushima-naka, Okayama 700-0082 (Japan)
  3. RIKEN/SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148 (Japan)
  4. (Japan)
Publication Date:
OSTI Identifier:
21052581
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 879; Journal Issue: 1; Conference: 9. international conference on synchrotron radiation instrumentation, Daegu (Korea, Republic of), 28 May - 2 Jun 2006; Other Information: DOI: 10.1063/1.2436125; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ABSORPTION; BEAM PRODUCTION; DICHROISM; HARMONICS; HELICITY; KICKER MAGNETS; PERFORMANCE; PHOTON BEAMS; SOFT X RADIATION; SPRING-8 STORAGE RING; WIGGLER MAGNETS

Citation Formats

Muro, T., Nakamura, T., Matsushita, T., Fukumoto, K., Kimura, H., Hirono, T., Kinoshita, T., Takeuchi, M., Wakita, T., Hara, T., Kitamura, H., JASRI/SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, and Shirasawa, K. Status of the Twin Helical Undulator Soft X-ray Beamline at SPring-8: Performance for Circular Dichroism Measurements. United States: N. p., 2007. Web. doi:10.1063/1.2436125.
Muro, T., Nakamura, T., Matsushita, T., Fukumoto, K., Kimura, H., Hirono, T., Kinoshita, T., Takeuchi, M., Wakita, T., Hara, T., Kitamura, H., JASRI/SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, & Shirasawa, K. Status of the Twin Helical Undulator Soft X-ray Beamline at SPring-8: Performance for Circular Dichroism Measurements. United States. doi:10.1063/1.2436125.
Muro, T., Nakamura, T., Matsushita, T., Fukumoto, K., Kimura, H., Hirono, T., Kinoshita, T., Takeuchi, M., Wakita, T., Hara, T., Kitamura, H., JASRI/SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, and Shirasawa, K. Fri . "Status of the Twin Helical Undulator Soft X-ray Beamline at SPring-8: Performance for Circular Dichroism Measurements". United States. doi:10.1063/1.2436125.
@article{osti_21052581,
title = {Status of the Twin Helical Undulator Soft X-ray Beamline at SPring-8: Performance for Circular Dichroism Measurements},
author = {Muro, T. and Nakamura, T. and Matsushita, T. and Fukumoto, K. and Kimura, H. and Hirono, T. and Kinoshita, T. and Takeuchi, M. and Wakita, T. and Hara, T. and Kitamura, H. and JASRI/SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198 and Shirasawa, K.},
abstractNote = {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 {approx} 0.5 {mu}m. The horizontal spot positions coincide, but the horizontal spot widths are different by {approx} 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.},
doi = {10.1063/1.2436125},
journal = {AIP Conference Proceedings},
number = 1,
volume = 879,
place = {United States},
year = {Fri Jan 19 00:00:00 EST 2007},
month = {Fri Jan 19 00:00:00 EST 2007}
}