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)
