X-FAST: A NEW XUV FEMTOSECOND ABSORPTION SPECTROSCOPY TABLETOP INSTRUMENT AT UW-MADISON
Abhari, Zain
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https://hdl.handle.net/2142/122636
Description
Title
X-FAST: A NEW XUV FEMTOSECOND ABSORPTION SPECTROSCOPY TABLETOP INSTRUMENT AT UW-MADISON
Author(s)
Abhari, Zain
Issue Date
2023-06-21
Keyword(s)
Instrument/Technique Demonstration
Abstract
Core-level spectroscopies enable element specific measurements of electronic and vibrational dynamics on the fem-tosecond timescale. Advancements in the generation of XUV light through high harmonic generation (HHG) has opened the door to doing such measurements in-house; we are currently in the commissioning phase of the X-FAST instrument at the University of Wisconsin - Madison. Here, we describe the instrument and show the initial capabilities and studies carried out using the X-FAST instrument. The instrument is comprised of two paths, an optical pump in air and an XUV probe in vacuum. We used this system to carry out two preliminary experiments: a study of the kinetics and dynamics of transition-metal perovskite oxides, and a collection of static transient absorption spectra of a metallic shape-memory alloy, Ni₂MnGa.
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