73 citations · 296 across the 18 of their papers we have counts for
19 papers
Domain Knowledge Guided Bayesian Optimization For Autonomous Alignment Of Complex Scientific Instruments
Aashwin Mishra, Matt Seaberg, Ryan Roussel +2
Bayesian Optimization (BO) is a powerful tool for optimizing complex non-linear systems. However, its performance degrades in high-dimensional problems with tightly coupled paramet…
Memory in strain-tuned insulator-metal-insulator sequence of transitions after photoexcitation in the Mott material V2O3
O. Yu. Gorobtsov, Y. Kalcheim, Z. Shao +9
Memory effects during metal-insulator transitions in quantum materials reveal complex physics and potential for novel electronics mimicking biological neural systems. Nonetheless,…
Data Driven Drift Correction For Complex Optical Systems
Aashwin Mishra, Matt Seaberg, Ryan Roussel +4
To exploit the thousand-fold increase in spectral brightness of modern light sources, increasingly intricate experiments are being conducted that demand extremely precise beam traj…
Experimental demonstration of attosecond hard X-ray pulses
Ichiro Inoue, River Robles, Aliaksei Halavanau +24
We present the first direct experimental confirmation of attosecond pulse generation in the hard X-ray regime with a free-electron laser. Our experiment is based on measurements of…
A Start To End Machine Learning Approach To Maximize Scientific Throughput From The LCLS-II-HE
Aashwin Mishra, Matt Seaberg, Ryan Roussel +5
With the increasing brightness of Light sources, including the Diffraction-Limited brightness upgrade of APS and the high-repetition-rate upgrade of LCLS, the proposed experiments…
Dynamic motion trajectory control with nanoradian accuracy for multi-element X-ray optical systems via laser interferometry
Sina M Koehlenbeck, Lance Lee, Mario D Balcazar +14
The past decades have witnessed the development of new X-ray beam sources with brightness growing at a rate surpassing Moore's law. Current and upcoming diffraction limited and ful…
Machine Learning Based Alignment For LCLS-II-HE Optics
Aashwin Mishra, Nicholas Brennan, Tianyu Huang +3
The hard X-ray instruments at the Linac Coherent Light Source are in the design phase for upgrades that will take full advantage of the high repetition rates that will become avail…
On Ultrafast X-ray Methods for Magnetism
Rajan Plumley, Sathya Chitturi, Cheng Peng +36
With the introduction of x-ray free electron laser sources around the world, new scientific approaches for visualizing matter at fundamental length and time-scales have become poss…
Real-time imaging of acoustic waves in bulk materials with X-ray microscopy
Theodor S. Holstad, Leora E. Dresselhaus-Marais, Trygve Magnus Ræder +10
Materials modelling and processing require experiments to visualize and quantify how external excitations drive the evolution of deep subsurface structure and defects that determin…
Simultaneous Bright- and Dark-Field X-ray Microscopy at X-ray Free Electron Lasers
Leora E. Dresselhaus-Marais, Bernard Kozioziemski, Theodor S. Holstad +40
The structures, strain fields, and defect distributions in solid materials underlie the mechanical and physical properties across numerous applications. Many modern microstructural…
A machine learning photon detection algorithm for coherent X-ray ultrafast fluctuation analysis
Sathya R. Chitturi, Nicolas G. Burdet, Youssef Nashed +8
X-ray free electron laser (XFEL) experiments have brought unique capabilities and opened new directions in research, such as creating new states of matter or directly measuring ato…
A Snapshot Review -- Fluctuations in Quantum Materials: From Skyrmions to Superconductivity
L. Shen, M. Seaberg, E. Blackburn +1
By measuring a linear response function directly, such as the dynamic susceptibility, one can understand fundamental material properties. However, a fresh perspective can be offere…
Generation of highly mutually coherent hard x-ray pulse pairs with an amplitude-splitting delay line
Haoyuan Li, Yanwen Sun, Joan Vila-Comamala +11
Beam splitters and delay lines are among the key building blocks of modern-day optical laser technologies. Progress in x-ray free electron laser source development and applications…
Magnetic Order Driven Ultrafast Phase Transition in NdNiO
V. Stoica, D. Puggioni, J. Zhang +12
Ultrashort x-ray pulses can be used to disentangle magnetic and structural dynamics and are accordingly utilized here to study the photoexcitation of NdNiO (NNO), a model nicke…
Enhanced charge density wave coherence in a light-quenched, high-temperature superconductor
S. Wandel, F. Boschini, E. H. da Silva Neto +28
Superconductivity and charge density waves (CDW) are competitive, yet coexisting orders in cuprate superconductors. To understand their microscopic interdependence, a probe capable…
Optically induced lattice deformations, electronic structure changes, and enhanced superconductivity in YBa2Cu3O6.48
R. Mankowsky, M. Fechner, M. Först +10
Resonant optical excitation of apical oxygen vibrational modes in the normal state of underdoped YBa2Cu3O6+x induces a transient state with optical properties similar to those of t…
Ptychographic hyperspectral spectromicroscopy with an extreme ultraviolet high harmonic comb
Bosheng Zhang, Dennis F. Gardner, Matthew H. Seaberg +7
We demonstrate a new scheme of spectromicroscopy in the extreme ultraviolet (EUV) spectral range, where the spectral response of the sample at different wavelengths is imaged simul…
Femtosecond X-ray magnetic circular dichroism absorption spectroscopy at an X-ray free electron laser
Daniel J. Higley, Konstantin Hirsch, Georgi L. Dakovski +25
X-ray magnetic circular dichroism spectroscopy using an X-ray free electron laser is demonstrated with spectra over the Fe L-edges. This new ultrafast time-resolved capabil…
Coherent Diffractive Imaging Using Randomly Coded Masks
Matthew H. Seaberg, Alexandre d'Aspremont, Joshua J. Turner
Coherent diffractive imaging (CDI) provides new opportunities for high resolution X-ray imaging with simultaneous amplitude and phase contrast. Extensions to CDI broaden the scope…