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Sep 13 – 19, 2015
La Biodola, Isola d'Elba
Europe/Rome timezone

Electron rephasing in a laser-plasma accelerator

Sep 14, 2015, 5:10 PM
20m
SML Sala Maria Luisa (Hotel Hermitage)

SML Sala Maria Luisa

Hotel Hermitage

talk WG1 - Electron beams from plasmas WG1 - Electron beams from plasmas

Speaker

Mr Andreas Döpp (Laboratoire d'Optique Appliquée / Centro de Láseres Pulsados)

Description

Energy gain in laser wakefield accelerators is generally limited by dephasing between highly relativistic electrons and the driving laser pulse. But as the relative phase depends on both the driver and the cavity length, the effects of dephasing can be mitigated with appropriate tailoring of the plasma density along propagation. The ideal case would provide constant phase adaption, but such a target is difficult to design. Here we present a simplified approach, which uses a sharp upward plasma density transition, generated by introducing a knife edge into the gas jet. Depending on the position of the shock, we observe that this onetime boost can augment the cutoff energy of electrons by almost 50 percent.

Primary author

Mr Andreas Döpp (Laboratoire d'Optique Appliquée / Centro de Láseres Pulsados)

Co-authors

Dr Agustin Lifschitz (LOA) Dr Amar Tafzi (LOA) Dr Cédric Thaury (LOA) Mr Emillien Guillaume (LOA) Dr Jean-Phillipe Goddet (LOA) Dr Laszlo Veisz (Max-Planck-Institut fuer Quantenoptik) Dr Shao-Wei Chou (MPQ) Prof. Victor Malka (LOA) Dr kim TA PHUOC (LOA)

Presentation materials