Sep 24 – 30, 2017
La Biodola, Isola d'Elba
Europe/Rome timezone

Acceleration of a positron beam in a hollow channel plasma

Sep 27, 2017, 7:30 PM
Parking Area, Hotel Hermitage

Parking Area, Hotel Hermitage

poster WG5 - High-Gradient Plasma Structures/Advanced Beam Diagnostics Wine and Poster Session 2 (WG4-WG5-WG6-WG7)


Spencer Gessner (CERN)


Hollow plasma channels have been proposed as a technique for generating accelerating fields without deleterious transverse forces. In this experiment, we generate meter-scale hollow plasma channels using high-order Bessel profile lasers to ionize a Lithium vapor source. The experiment took place at FACET at SLAC National Accelerator Laboratory. FACET was the only facility in the world capable of providing positron beams for PWFA experiments. Using a higher-charge positron beam to excite a wake in the hollow plasma channel, we are able to demonstrate the acceleration of a lower-charge trailing beam traveling in the hollow channel wake.

Primary author

Spencer Gessner (CERN)


Mr Antoine Doche (Laboratoire d'Optique Appliquée, Ecole Polytechnique-Ensta, France) Dr Brendan O'Shea (SLAC National Accelerator Laboratory) C. E. Clayton (UCLA) C. I. Clarke (SLAC) C. Joshi (UCLA) Mr Carl Andreas Lindstrøm (University of Oslo) Dr Erik Adli (University of Oslo, Norway) J. M. Allen (SLAC) K. A. Marsh (UCLA) M. Litos (University of Colorado and SLAC) Mark Hogan (SLAC National Accelerator Laboratory) N. Vafaei-Najafabadi (Stony Brook University and SLAC) S. Z. Green (SLAC) Prof. Sébastien Corde (Ecole Polytechnique) Dr Vitaly Yakimenko (SLAC) W. B. Mori (UCLA) Dr Weiming An (University of California Los Angeles)

Presentation materials