24-30 September 2017
La Biodola, Isola d'Elba
Europe/Rome timezone

Multi-GeV electron acceleration from self-guided laser wakefield accelerators with extended focussing geometry

25 Sep 2017, 18:18
18m
SML, Sala Maria Luisa (HH)

SML, Sala Maria Luisa

HH

talk WG1 - Electron Beams from Plasmas WG1_Parallel

Speaker

Dr Kristjan Poder (DESY)

Description

Recent experimental electron acceleration results in the self-guiding, self-injecting regime from the 250 TW Gemini laser are presented. Employing an extended f/40 focussing geometry instead of an f/20 resulted in maximum single stage energy gains of up to 2.5 GeV, a more than twofold increase. The generated electron beams carry hundreds of millijoules of energy, with more than 50 % of the total beam energy in electrons with energies beyond 1 GeV. Three-dimensional particle-in-cell simulations revealed the differing dynamics of self-focussing in the extended focal geometry. Smoother transverse self-focussing provides stable self-injection into the wake in a phase with extremely high accelerating fields, resulting in enhanced acceleration in a quasi-stable ion cavity.

Primary author

Dr Kristjan Poder (DESY)

Co-authors

Dr Aakasj Sahai (Imperial College London) Dr CHRISTOS KAMPERIDIS (ELI-ALPS, HU) Dr Charlotte Palmer (Lancaster University/Cockcroft Institute) Dr Daniel Symes (Rutherford Appleton Laboratory) Dr Gianluca Sarri (Queen's University Belfast) Dr Jason Cole (Imperial College London) Dr Jonathan Wood (Imperial College London) Dr Nelson Carreira-Lopes (Imperial College London) Olena Kononenko (Deutsches-Elektronen-Synchrotron (DESY)) Dr Peta Foster (CLF) Mr Richard Warwick (Queen's University Belfast) Dr Stuart Mangles (Imperial College London) Prof. Zulfikar Najmudin (Imperial College London)

Presentation Materials