326 citations · 623 across the 16 of their papers we have counts for
16 papers
A Novel Method for Solving the Linearized 1D Vlasov--Poisson Equation
Frank M. Lee, B. A. Shadwick
We present a novel method for solving the linearized Vlasov--Poisson equation, based on analyticity properties of the equilibrium and initial condition through Cauchy-type integral…
Report of Snowmass 21 Accelerator Frontier Topical Group 6 on Advanced Accelerators
C. Geddes, M. Hogan, P. Musumeci +1
The Snowmass 2021 Accelerator Frontier topical group \# 6 on Advanced Accelerator Concepts, covers new R\&D concepts for particle acceleration, generation, and focusing. Based on c…
Four-field Hamiltonian fluid closures of the one-dimensional Vlasov-Poisson equation
Cristel Chandre, Bradley A Shadwick
We consider a reduced dynamics for the first four fluid moments of the onedimensional Vlasov-Poisson equation, namely, the fluid density, fluid velocity, pressure and heat flux. Th…
Snowmass Whitepaper AF6: Plasma-Based Particle Sources
M. Fuchs, B. A. Shadwick, N. Vafaei-Najafabadi +9
High-brightness beams generated by particle sources based on advanced accelerator concepts have the potential to become an essential part of future accelerator technology. High-gra…
Transverse Oscillating Bubble Enhanced Laser-driven Betatron X-ray Radiation Generation
Rafal Rakowski, Ping Zhang, Kyle Jensen +10
Ultrafast high-brightness X-ray pulses have proven invaluable for a broad range of research. Such pulses are typically generated via synchrotron emission from relativistic electron…
Spin-dependent two-color Kapitza-Dirac effects
Scot McGregor, Wayne Cheng-Wei Huang, Bradley A. Shadwick +1
In this paper we present an analysis of the spin behavior of electrons propagating through a laser field. We present an experimentally realizable scenario in which spin-dependent e…
Hamiltonian fluid reduction of the 1.5D Vlasov-Maxwell equations
Cristel Chandre, Bradley A. Shadwick
We consider the Vlasov-Maxwell equations with one spatial direction and two momenta, one in the longitudinal direction and one in the transverse direction. By solving the Jacobi id…
Noise and error analysis and optimization in particle-based kinetic plasma simulations
E. G. Evstatiev, J. M. Finn, B. A. Shadwick +1
We analyze the noise in macro-particle methods used in plasma physics and fluid dynamics, leading to approaches for minimizing the total error, focusing on electrostatic models in…
Variational Formulation of E & M Particle Simulation Algorithms in Cylindrical Geometry using an Angular Modal Decomposition
A. B. Stamm, B. A. Shadwick
Taking advantage of the flexibility of the variational method with coordinate transformations, we derive a self-consistent set of equations of motion from a discretized Lagrangian…
Variational Formulation of Macro-Particle Models for Electromagnetic Plasma Simulations
A. B. Stamm, B. A. Shadwick, E. G. Evstatiev
A variational method is used to derive a self-consistent macro-particle model for relativistic electromagnetic kinetic plasma simulations. Extending earlier work [E. G. Evstatiev a…
Variational formulation of particle algorithms for kinetic plasma simulations
E. G. Evstatiev, B. A. Shadwick
Common time-explicit numerical methods for kinetic simulations of plasmas in the low-collisions limit fall into two classes of algorithms: momentum conserving and energy conserving…
Spectral Bandwidth Reduction of Thomson Scattered Light by Pulse Chirping
Isaac Ghbregziabher, Bradley Shadwick, Donald Umstadter
Based on single particle tracking in the framework of classical Thomson scattering with incoherent superposition, we developed a fully relativistic, three dimensional numerical cod…
Computationally efficient methods for modelling laser wakefield acceleration in the blowout regime
B. M. Cowan, S. Y. Kalmykov, A. Beck +7
Electron self-injection and acceleration until dephasing in the blowout regime is studied for a set of initial conditions typical of recent experiments with 100 terawatt-class lase…
Spectral reduction: a statistical description of turbulence
John C. Bowman, B. A. Shadwick, P. J. Morrison
A method is described for predicting statistical properties of turbulence. Collections of Fourier amplitudes are represented by nonuniformly spaced modes with enhanced coupling coe…
Status of Muon Collider Research and Development and Future Plans
Charles M. Ankenbrandt
The status of the research on muon colliders is discussed and plans are outlined for future theoretical and experimental studies. Besides continued work on the parameters of a 3-4…
Exactly Conservative Integrators
B. A. Shadwick, John C. Bowman, P. J. Morrison
Traditional numerical discretizations of conservative systems generically yield an artificial secular drift of any nonlinear invariants. In this work we present an explicit nontrad…