|Present||Faculty Member, University of Nebraska - Lincoln|
Laser wakefield acceleration (theory) (2)
Laser wakefield acceleration (numerical support of the experiment) (2)
Stable, tunable, quasimonoenergetic electron beams produced in a laser wakefield ...
Physical Review Special Topics - Accelerators and Beams (2013)
Stable operation of a laser-plasma accelerator near the threshold for electron self-injection in the blowout regime has been demonstrated with ...
No Subject Area (87)
Background-Free, Quasi-Monoenergetic Electron Beams from a Self-Injected Laser Wakefield Accelerator
Donald Umstadter Publications (2011)
Stable 200–400-MeV quasi-monoenergetic electron bunches (ΔE/Eno dark-currentare produced when a self-injected laser plasma accelerator is optimized. PIC simulations demonstrate these ...
Observation of relativistic cross-phase modulation in high-intensity laser-plasma interactions
Donald Umstadter Publications (2006)
A nonlinear optical phenomenon, relativistic cross-phase modulation, is reported. A relativistically intense light beam (I=1.3×1018 W cm-2, λ =1.05 μm) ...
Thomson scattering and ponderomotive intermodulation within standing laser beat waves ...
Donald Umstadter Publications (2005)
Electrons in a standing electromagnetic wave—an optical lattice—tend to oscillate due to the quiver and ponderomotive potentials. For sufficiently intense ...