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.
| Original language | English |
|---|---|
| Title of host publication | AIP Conference Proceedings |
| Pages | 571-574 |
| Number of pages | 4 |
| Volume | 879 |
| DOIs | |
| Publication status | Published - 2007 |
| Event | SYNCHROTRON RADIATION INSTRUMENTATION: 9th International Conference on Synchrotron Radiation Instrumentation - Daegu, Korea, Republic of Duration: May 28 2006 → Jun 28 2006 |
Other
| Other | SYNCHROTRON RADIATION INSTRUMENTATION: 9th International Conference on Synchrotron Radiation Instrumentation |
|---|---|
| Country | Korea, Republic of |
| City | Daegu |
| Period | 5/28/06 → 6/28/06 |
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Keywords
- Circular dichroism.
- Helicity switching
- Soft x-ray beamline
- Twin helical undulators
ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Status of the twin helical undulator soft X-ray beamline at SPring-8 : Performance for circular dichroism measurements. / Muro, T.; Nakamura, T.; Matsushita, T.; Wakita, Takanori; Fukumoto, K.; Kimura, H.; Hirono, T.; Kinoshita, T.; Hara, T.; Shirasawa, K.; Takeuchi, M.; Kitamura, H.
AIP Conference Proceedings. Vol. 879 2007. p. 571-574.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Status of the twin helical undulator soft X-ray beamline at SPring-8
T2 - Performance for circular dichroism measurements
AU - Muro, T.
AU - Nakamura, T.
AU - Matsushita, T.
AU - Wakita, Takanori
AU - Fukumoto, K.
AU - Kimura, H.
AU - Hirono, T.
AU - Kinoshita, T.
AU - Hara, T.
AU - Shirasawa, K.
AU - Takeuchi, M.
AU - Kitamura, H.
PY - 2007
Y1 - 2007
N2 - 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.
AB - 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.
KW - Circular dichroism.
KW - Helicity switching
KW - Soft x-ray beamline
KW - Twin helical undulators
UR - http://www.scopus.com/inward/record.url?scp=33947403067&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33947403067&partnerID=8YFLogxK
U2 - 10.1063/1.2436125
DO - 10.1063/1.2436125
M3 - Conference contribution
AN - SCOPUS:33947403067
SN - 0735403732
SN - 9780735403734
VL - 879
SP - 571
EP - 574
BT - AIP Conference Proceedings
ER -