Ryan T. Ash

ORCID: 0000-0003-0459-9797
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About
Contact & Profiles
Research Areas
  • Neural dynamics and brain function
  • Spectroscopy and Quantum Chemical Studies
  • Advanced Electron Microscopy Techniques and Applications
  • X-ray Spectroscopy and Fluorescence Analysis
  • Functional Brain Connectivity Studies
  • Laser-Matter Interactions and Applications
  • Advanced X-ray Imaging Techniques
  • Advanced Chemical Physics Studies
  • Visual perception and processing mechanisms

University of Wisconsin–Madison
2023

Stanford University
2022

We present the X-FAST (XUV Femtosecond Absorption Spectroscopy Tabletop) instrument at University of Wisconsin-Madison. The produces femtosecond extreme ultraviolet photon pulses via high-harmonic generation in range 40-72 eV, as well optical pump for transient-absorption experiments. system implements a gas-cooled sample cell that enables studying dynamics thermally sensitive thin-film samples. This paper provides potential users with specifications optical, vacuum, data acquisition, and...

10.1063/5.0146137 article EN Review of Scientific Instruments 2023-07-01

X-ray free-electron lasers (XFELs) deliver intense x-ray pulses that destroy the sample in a single shot by Coulomb explosion. Experiments using XFEL pulse trains or new generation of high-repetition rate XFELs require rapid replacement beyond those provided systems now used at low repletion-rate XFELs. We describe development and characterization system based on spinning disk to continuously solid into an interaction point very high speeds. tested our Linac Coherent Light Source European...

10.1063/5.0168125 article EN cc-by Review of Scientific Instruments 2023-10-01

ABSTRACT A repeated measure of neural activity that is stable over time when unperturbed needed to be able meaningfully neuroplastic changes in the brain. With sensory-evoked potentials particular, presentation stimuli can generate neuroplasticity by itself under certain conditions. We assessed repeated-measure within-day and across-day stability steady-state visual-evoked potential (ssVEP), a high signal-to-noise electrophysiological readout human visual cortex, preparation for studies...

10.1101/2022.06.08.495412 preprint EN cc-by-nc bioRxiv (Cold Spring Harbor Laboratory) 2022-06-12
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