Machine learning for orders of magnitude speedup in multiobjective optimization of particle accelerator systems

A Edelen, N Neveu, M Frey, Y Huber, C Mayes… - … Review Accelerators and …, 2020 - APS
High-fidelity physics simulations are powerful tools in the design and optimization of
charged particle accelerators. However, the computational burden of these simulations often …

Mixed quantum–classical method for fraud detection with quantum feature selection

M Grossi, N Ibrahim, V Radescu… - IEEE Transactions …, 2022 - ieeexplore.ieee.org
This article presents a first end-to-end application of a quantum support vector machine
(QSVM) algorithm for a classification problem in the financial payment industry using the IBM …

Temporal shaping of narrow-band picosecond pulses via noncolinear sum-frequency mixing of dispersion-controlled pulses

R Lemons, N Neveu, J Duris, A Marinelli, C Durfee… - … Review Accelerators and …, 2022 - APS
A long-sought-after goal for photocathode electron sources has been to improve
performance by temporally shaping the incident excitation laser pulse. The narrow …

Development and benchmarking of a Monte Carlo dose engine for proton radiation therapy

P Lysakovski, A Ferrari, T Tessonnier, J Besuglow… - Frontiers in …, 2021 - frontiersin.org
Dose calculation algorithms based on Monte Carlo (MC) simulations play a crucial role in
radiotherapy. Here, the development and benchmarking of a novel MC dose engine …

Sparse grid-based adaptive noise reduction strategy for particle-in-cell schemes

S Muralikrishnan, AJ Cerfon, M Frey… - Journal of …, 2021 - Elsevier
We propose a sparse grid-based adaptive noise reduction strategy for electrostatic particle-
in-cell (PIC) simulations. By projecting the charge density onto sparse grids we reduce the …

[HTML][HTML] A particle-in-Fourier method with semi-discrete energy conservation for non-periodic boundary conditions

CN Shen, A Cerfon, S Muralikrishnan - Journal of Computational Physics, 2024 - Elsevier
We introduce a novel particle-in-Fourier (PIF) scheme based on [1],[2] that extends its
applicability to non-periodic boundary conditions. Our method handles free space boundary …

libEnsemble: A library to coordinate the concurrent evaluation of dynamic ensembles of calculations

S Hudson, J Larson, JL Navarro… - IEEE Transactions on …, 2021 - ieeexplore.ieee.org
Almost all applications stop scaling at some point; those that don't are seldom performant
when considering time to solution on anything but aspirational/unicorn resources …

Comparison of multiobjective optimization methods for the LCLS-II photoinjector

N Neveu, TH Chang, P Franz, S Hudson… - Computer Physics …, 2023 - Elsevier
Particle accelerators are among some of the largest science experiments in the world and
can consist of thousands of components with a wide variety of input ranges. These systems …

Analyzing beam-gas interactions in an cyclotron beam

P Calvo, D Winklehner, C Oliver… - Journal of Physics G …, 2023 - iopscience.iop.org
Abstract For the Isotope Decay At Rest (IsoDAR) experiment in neutrino physics (searching
for sterile neutrinos), we have developed a novel compact isochronous cyclotron with direct …

Performance analysis of indicators of chaos for nonlinear dynamical systems

A Bazzani, M Giovannozzi, CE Montanari, G Turchetti - Physical Review E, 2023 - APS
The efficient detection of chaotic behavior in orbits of a complex dynamical system is an
active domain of research. Several indicators have been proposed, and new ones have …