1. Plasma gradient controlled injection and postacceleration of high quality electron bunches
- Author
-
C. G. R. Geddes, E. Cormier-Michel, E. Esarey, K. Nakamura, G. R. Plateau, C. B. Schroeder, Cs. Toth, D. L. Bruhwiler, J. R. Cary, W. P. Leemans, Carl B. Schroeder, Wim Leemans, and Eric Esarey
- Subjects
Nuclear physics ,Physics ,Momentum (technical analysis) ,Bunches ,Transition radiation ,law ,Physics::Accelerator Physics ,Particle accelerator ,Plasma ,Electron ,Phase velocity ,Plasma acceleration ,law.invention - Abstract
Plasma density gradient control of wake phase velocity and trapping threshold in a laser wakefield accelerator produced electron bunches with absolute longitudinal and transverse momentum spreads more than ten times lower than in previous experiments (0.17 and 0.02 MeV/c FWHM, respectively) and with central momenta of 0.76±0.02 MeV/c, stable over a week of operation. Simulations validated against diagnostics show that use of such bunches as a wakefield accelerator injector can produce stable beams with 0.2 MeV/c‐class momentum spread at high energies. Preservation of bunch momentum spread requires high simulation momentum accuracy, and related self‐trapped simulations showed that high order particle weight effectively suppresses simulation momentum errors allowing design of low emittance stages.Plasma density gradient control of wake phase velocity and trapping threshold in a laser wakefield accelerator produced electron bunches with absolute longitudinal and transverse momentum spreads more than ten times lower than in previous experiments (0.17 and 0.02 MeV/c FWHM, respectively) and with central momenta of 0.76±0.02 MeV/c, stable over a week of operation. Simulations validated against diagnostics show that use of such bunches as a wakefield accelerator injector can produce stable beams with 0.2 MeV/c‐class momentum spread at high energies. Preservation of bunch momentum spread requires high simulation momentum accuracy, and related self‐trapped simulations showed that high order particle weight effectively suppresses simulation momentum errors allowing design of low emittance stages.
- Published
- 2009