A Measurement System For Circular Dichroism In Soft X-ray Absorption Using Helicity Switching By Twin Helical Undulators

Muro, T.; Saitoh, Y.; Kimura, H.; Matsushita, T.; Nakatani, T.; Takeuchi, M.; Hirono, T.; Kudo, T.; Nakamura, T.; Wakita, T.; Kkobayashi, K.; Hara, T.; Shirasawa, K.; Kitamura, H.; Warwick, T.
April 2004
AIP Conference Proceedings;2004, Vol. 705 Issue 1, p1051
Academic Journal
A measurement system for circular dichroism (CD) of soft X-ray absorption has been developed using helicity switching of circularly polarized radiation by twin helical undulators at BL25SU of SPring-8. Difference of horizontal spot positions between the negative- and positive-helicity light at the sample position is within ±3μm. Measurement time for magnetic circular dichroism (MCD) of core absorption is shortened to less than 1/3 in comparison with an existing system of magnetic field switching, keeping the same data quality. © 2004 American Institute of Physics


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