Double conical crystal x-ray spectrometer for high resolution ultrafast x-ray absorption near-edge spectroscopy of Al K edge.
An x-ray spectrometer devoted to dynamical studies of transient systems using the x-ray absorption fine spectroscopy technique is presented in this article. Using an ultrafast laser-induced x-ray source, this optical device based on a set of two potassium acid phthalate conical crystals allows the extraction of x-ray absorption near-edge spectroscopy structures following the Al absorption K edge. The proposed experimental protocol leads to a measurement of the absorption spectra free from any crystal reflectivity defaults and shot-to-shot x-ray spectral fluctuation. According to the detailed analysis of the experimental results, a spectral resolution of 0.7 eV rms and relative fluctuation lower than 1% rms are achieved, demonstrated to be limited by the statistics of photon counting on the x-ray detector.
Levy
A
A
Centre Lasers Intenses et Applications (CELIA), Université de Bordeaux-CNRS-CEA, Talence F-33405, France.
Dorchies
F
F
Fourment
C
C
Harmand
M
M
Hulin
S
S
Santos
J J
JJ
Descamps
D
D
Petit
S
S
Bouillaud
R
R
D000042:Absorption; D000465:Algorithms; D017607:Aluminum Compounds / Q000737:chemistry; D004867:Equipment Design; D005240:Feasibility Studies; D007834:Lasers; D016014:Linear Models; D017785:Photons; D010795:Phthalic Acids; D017680:Potassium Compounds; D012815:Signal Processing, Computer-Assisted; D013997:Time Factors; D056928:X-Ray Absorption Spectroscopy / Q000295:instrumentation* / Q000379:methods*
D017607:Aluminum Compounds; D010795:Phthalic Acids; D017680:Potassium Compounds; C032279:phthalic acid