TY - JOUR
T1 - Circular dichroism measurement of soft X-ray absorption using helicity modulation of helical undulator radiation
AU - Muro, T.
AU - Nakamura, T.
AU - Matsushita, T.
AU - Kimura, H.
AU - Nakatani, T.
AU - Hirono, T.
AU - Kudo, T.
AU - Kobayashi, K.
AU - Saitoh, Y.
AU - Takeuchi, M.
AU - Hara, T.
AU - Shirasawa, K.
AU - Kitamura, H.
PY - 2005/6
Y1 - 2005/6
N2 - The measurement of circular dichroism (CD) in soft X-ray absorption at BL25SU of SPring-8 has been developed into a phase-sensitive detection using helicity modulation (HM) of circularly polarized light. The HM is performed by the light source, "twin helical undulators". A lock-in amplifier is used for the phase-sensitive detection to extract small CD signals buried in noises. The noise level of a measured magnetic CD has been reduced to less than 1/10 by using this method in comparison with a normal integration measurement.
AB - The measurement of circular dichroism (CD) in soft X-ray absorption at BL25SU of SPring-8 has been developed into a phase-sensitive detection using helicity modulation (HM) of circularly polarized light. The HM is performed by the light source, "twin helical undulators". A lock-in amplifier is used for the phase-sensitive detection to extract small CD signals buried in noises. The noise level of a measured magnetic CD has been reduced to less than 1/10 by using this method in comparison with a normal integration measurement.
KW - Circular dichroism
KW - Helical undulator radiation
KW - Helicity modulation
KW - Soft X-ray absorption
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U2 - 10.1016/j.elspec.2005.01.140
DO - 10.1016/j.elspec.2005.01.140
M3 - Article
AN - SCOPUS:20244384440
SN - 0368-2048
VL - 144-147
SP - 1101
EP - 1103
JO - Journal of Electron Spectroscopy and Related Phenomena
JF - Journal of Electron Spectroscopy and Related Phenomena
ER -