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Graduate Student Seminar - 04/03/2015

"Laser Driven Electron Accelerators Based on Structured Plasmas"

by Andy Goers

Friday, April 3, 2015 -- 12:00 p.m.
Large Conference Room, 1207 Energy Research Facility

Advisor:  Professor Howard Milchberg

The interaction of high peak power femtosecond laser pulses with plasma is promising for the development of next generation radiation sources. Accelerating gradients orders of magnitude higher than conventional RF accelerators can be sustained within a plasma potentially allowing a substantial reduction in the overall cost and footprint of MeV scale electron and ion accelerators. I will present recent results on laser driven electron acceleration experiments at UMD, all of which rely on fine control of plasma structures on a submillimeter scale. Hydrodynamic expansion of a centimeter long plasma channel is used to create a “fiber” capable of guiding relativistically intense laser pulses over many Rayleigh lengths. Further, I will present a scheme for electron acceleration by the longitudinal electric field of a focused, radially polarized femtosecond laser pulse in a modulated plasma channel. Programmable modulations of the channel create a slow wave structure which can phase match the laser interaction with a co-propagating relativistic electron bunch leading to energy gains ~ 100 MeV over centimeter scale lengths using sub-TW drive lasers.

For additional information about the IREAP Graduate Student Seminars, contact Joe Garrett, David Somers or Joe Murray.

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