Bulletin of the American Physical Society
49th Annual Meeting of the Division of Plasma Physics
Volume 52, Number 11
Monday–Friday, November 12–16, 2007; Orlando, Florida
Session GO7: Laser Driven Electron and Ion Acceleration
9:30 AM–12:18 PM,
Tuesday, November 13, 2007
Rosen Centre Hotel Room: Salon 7/8
Chair: Karl Krushelnick, University of Michigan
Abstract ID: BAPS.2007.DPP.GO7.2
Abstract: GO7.00002 : Stable electron bunches with low absolute momentum spread using plasma down ramp injection in a laser wakefield accelerator*
9:42 AM–9:54 AM
Preview Abstract Abstract
Control of particle trapping in a laser wakefield accelerator using plasma density gradients produced stable electron bunches at momenta near 1 MeV/c and with 170 keV/c FWHM momentum spread, 20 keV/c RMS central momentum variation, and repeatable charge and pointing. A 10 TW laser pulse was focused near the downstream edge of a mm-long hydrogen gas jet so that plasma density near focus decreased in the laser propagation direction. Particle simulations indicate the gradient slowed wake phase velocity resulting in stable trapping. Simulations and transition radiation experiments indicate the bunches are ultrafast. Simulations further show that the bunches can be post accelerated in plasma wakes, potentially producing stable multi-GeV beams with greatly reduced momentum spread.
*Work supported by DOE grant DE-AC02-05CH11231, others, and using NERSC and incite.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2007.DPP.GO7.2
The American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics.
1 Physics Ellipse, College Park, MD 20740-3844
Editorial Office 1 Research Road, Ridge, NY 11961-2701 (631) 591-4000
Office of Public Affairs 529 14th St NW, Suite 1050, Washington, D.C. 20045-2001 (202) 662-8700