view article
Figure 13
Layout of the experimental station for time-resolved XAS and XMCD in transmission. The left-hand chamber holds the sample and the magnetic field (coils are shaded magenta); the detector is mounted in the right-hand chamber (the blue arrow points on it). The laser pump and the X-ray probe beams both enter the sample chamber through the same flange in a collinear geometry. The laser beam is absorbed by the sample and any stray light is filtered by an Al foil mounted between the two chambers. The APD in the right-hand chamber thus detects only the X-rays transmitted through the sample. In addition, APDs feature a response time fast enough to resolve individual bunches from the storage ring. This is essential for time-gating to only measure photons coming from the laser-sliced electron bunch. Third, the transmission measurement is the most direct way for determining the absorption, which becomes important when performing the XMCD sum rule analysis.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 21| Part 5| August 2014| Pages 1090-1104
doi:10.1107/S1600577514012247
Follow J. Synchrotron Rad.
Sign up for e-alerts
E-alerts
Follow J. Synchrotron Rad. on Twitter
Twitter
Follow us on facebook
Facebook
Sign up for RSS feeds
RSS