31 July 2016 to 5 August 2016
Gaylord Hotel and Conference Center
US/Eastern timezone

Role of direct laser acceleration of electrons in a laser wakefield accelerator with ionization injection

4 Aug 2016, 15:50
20m
Woodrow Wilson CD (Gaylord Hotel)

Woodrow Wilson CD

Gaylord Hotel

Oral Working Group 1 WG1

Speaker

Prof. Chan Joshi (University of California, Los Angeles)

Abstract

We show through experiments and supporting simulations the role of direct laser acceleration (DLA) of electrons in a laser wakefield accelerator when ionization injection of electrons is employed. The produced electron beams exhibit characteristic features that are indicative of DLA as an additional acceleration mechanism when the laser pulse overlaps the trapped electrons.

Summary

We show through experiments and supporting simulations the role of direct laser acceleration (DLA) of electrons in a laser wakefield accelerator when ionization injection of electrons is employed. The laser pulse is intense enough to create a nonlinear wakefield and long enough to overlap the electrons trapped in the first accelerating potential well (bucket) of the wakefield. The betatron oscillations of the trapped electrons in the plane of the laser polarization in the presence of an ion column lead to an energy transfer from the laser pulse to the electrons through DLA. We show that the produced electron beams exhibit characteristic features that are indicative of DLA as an additional acceleration mechanism when the laser pulse overlaps the trapped electrons.

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Primary author

Co-authors

Prof. Chan Joshi (University of California, Los Angeles) Dr. Frank Tsung (UCLA) Mr. Ken Marsh (UCLA) Ms. Ligia Diana Amorim (IST) Mr. Navid Vafaei-Najafabadi (UCLA) Dr. Nuno Lemos (UCLA) Dr. Warren Mori (UCLA)

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