Degree of circular polarization of soft X-rays emitted from a multi-polarization-mode undulator characterized by means of magnetic circular dichroism measurements.
The degree of circular polarization of soft X-rays emitted from the multi-polarization-mode undulator of BL17SU at SPring-8 has been deduced by means of magnetic circular dichroism in core-level X-ray absorption spectroscopy for a ferrimagnetic Gd-Fe-Co amorphous thin film. The results of reference measurements performed using well characterized undulator radiation of BL25SU at SPring-8 have also been utilized. The degrees of circular polarization were presumed for all the available operational modes and were compared with simple theoretical calculations. It was found that the calculated degrees of circular polarization were validated by the measurements reasonably well and will be useful in further experiments at BL17SU.
Oura
Masaki
M
RIKEN SPring-8 Center, Harima Institute, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan. oura@spring8.or.jp
Nakamura
Tetsuya
T
Takeuchi
Tomoyuki
T
Senba
Yasunori
Y
Ohashi
Haruhiko
H
Shirasawa
Katsutoshi
K
Tanaka
Takashi
T
Takeuchi
Masao
M
Furukawa
Yukito
Y
Hirono
Toko
T
Ohata
Toru
T
Kitamura
Hideo
H
Shin
Shik
S