Satisfying the Direct Laser Acceleration Resonance Condition in a Laser Wakefield Accelerator

26 Feb 2015  ·  Shaw J. L., Vafaei-Najafabadi N., Marsh K. A., Lemos N., Tsung F. S., Mori W. B, Joshi C. ·

In this proceeding, we show that when the drive laser pulse overlaps the trapped electrons in a laser wakefield accelerator (LWFA), those electrons can gain energy from direct laser acceleration (DLA) over extended distances despite the evolution of both the laser and the wake. Through simulations, the evolution of the properties of both the laser and the electron beam is quantified, and then the resonance condition for DLA is examined in the context of this change... We find that although the electrons produced from the LWFA cannot continuously satisfy the DLA resonance condition, they nevertheless can gain a significant amount of energy from DLA. read more

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Plasma Physics