X-ray absorption spectroscopy using a self-seeded soft X-ray free-electron laser.
X-ray free electron lasers (XFELs) enable unprecedented new ways to study the electronic structure and dynamics of transition metal systems. L-edge absorption spectroscopy is a powerful technique for such studies and the feasibility of this method at XFELs for solutions and solids has been demonstrated. However, the required x-ray bandwidth is an order of magnitude narrower than that of self-amplified spontaneous emission (SASE), and additional monochromatization is needed. Here we compare L-edge x-ray absorption spectroscopy (XAS) of a prototypical transition metal system based on monochromatizing the SASE radiation of the linac coherent light source (LCLS) with a new technique based on self-seeding of LCLS. We demonstrate how L-edge XAS can be performed using the self-seeding scheme without the need of an additional beam line monochromator. We show how the spectral shape and pulse energy depend on the undulator setup and how this affects the x-ray spectroscopy measurements.
Thomas
T
Kroll
Jan
J
Kern
Markus
M
Kubin
Daniel
D
Ratner
Sheraz
S
Gul
Franklin D
FD
Fuller
Heike
H
Löchel
Jacek
J
Krzywinski
Alberto
A
Lutman
Yuantao
Y
Ding
Georgi L
GL
Dakovski
Stefan
S
Moeller
Joshua J
JJ
Turner
Roberto
R
Alonso-Mori
Dennis L
DL
Nordlund
Jens
J
Rehanek
Christian
C
Weniger
Alexander
A
Firsov
Maria
M
Brzhezinskaya
Ruchira
R
Chatterjee
Benedikt
B
Lassalle-Kaiser
Raymond G
RG
Sierra
Hartawan
H
Laksmono
Ethan
E
Hill
Andrew
A
Borovik
Alexei
A
Erko
Alexander
A
Föhlisch
Rolf
R
Mitzner
Vittal K
VK
Yachandra
Junko
J
Yano
Philippe
P
Wernet
Uwe
U
Bergmann