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Laser wakefield bubble regime acceleration of electrons in a preformed non uniform plasma channel

Published online by Cambridge University Press:  25 September 2012

K.K. Magesh Kumar  and
V.K. Tripathi
K.K. Magesh Kumar*
Affiliation:
Physics Department, Indian Institute of Technology Delhi, New Delhi, India
V.K. Tripathi
Affiliation:
Physics Department, Indian Institute of Technology Delhi, New Delhi, India
*
Address correspondence and reprint requests to: K.K. Magesh Kumar, Physiscs Department, Indian Institute of Technology Delhi, 110016, India. E-mail: [email protected]
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Abstract

A model of bubble regime electron acceleration by an intense laser pulse in non uniform plasma channel is developed. The plasma electrons at the front of the pulse and slightly off the laser axis in the plasma channel, experience axial and radial ponderomotive and space charge forces, creating an electron evacuated non uniform ion bubble. The expelled electrons travel along the surface of the bubble and reach the stagnation point, forming an electron sphere of radius re. The electrons of this sphere are pulled into the ion bubble and are accelerated to high energies. The Lorentz boosted frame enabled us to calculate energy gain of a test electron inside the bubble.

Keywords

Plasma channelPondermotive forceStagnation pointWakefield
Type
Research Article
Information
Laser and Particle Beams , Volume 30 , Issue 4 , December 2012 , pp. 575 - 582
Copyright
Copyright © Cambridge University Press 2012

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