Sep 15 – 21, 2019
Hotel Hermitage, La Biodola Bay, Isola d'Elba, Italy
Europe/Rome timezone

Progress towards high-repetition-rate plasma accelerators

Sep 17, 2019, 6:40 PM
SML (Hotel Hermitage)


Hotel Hermitage

talk WG1 - Electron beams from plasmas WG1 - Plasma acceleration physics II and high rep rates


Simon Hooker (University of Oxford)


We provide an overview of three areas of our programme which seek to address the challenge of realizing controlled laser wakefield accelerators (LWFAs) operating at kilohertz repetition rates. Driving plasma accelerators with trains of laser pulses offers the potential to use laser systems capable of multi-kilohertz pulse repetition rate with high wall-plug efficiency. We describe a proof-of-principle demonstration of the multi-pulse laser wakefield accelerator (MP-LWFA) concept in which wakefields were driven by trains of up to seven laser pulses generated from a Ti:sapphire laser. Controlling the injection and trapping of electrons is necessary to improve the bunch parameters produced by LWFAs, but this is challenging for the quasi-linear regime in which MP-LWFAs operate. We describe how simultaneous space-time focusing can improve the properties of bunches trapped following two-pulse ionization injection in the quasi-linear regime. Finally, we describe our work to develop hydrodynamic optical-field-ionized (HOFI) plasma channels which are capable of generating long, low-density channels well suited to all types of LWFA. We present our latest results, which include demonstration of guiding of high-intensity laser pulses in HOFI plasma channels with axial densities as low as $n_\mathrm{e}(0) = 1.5 \times 10^{17}~\mathrm{cm}^{−3}$ and lowest-order modes of spot size $W_\mathrm{M} \approx 40 \mu\mathrm{m}$.

Primary author

Simon Hooker (University of Oxford)


Aaron Alejo (Queen's University of Belfast) Ms Aimee Ross (University of Oxford) Alex Picksley (University of Oxford) Mr Alexander von Boetticher (University of Oxford) Christopher Arran (University of Oxford) Christopher Thornton (STFC) Dr George Hine (University of Maryland) Dr Harry Jones (University of Liverpool) Howard Milchberg (University of Maryland) Jakob Jonnerby (University of Oxford) Mr James Cowley (University of Oxford) James Holloway (The University of Oxford) Dr Laura Corner (Cockcroft Institute, University of Liverpool) Mr Linus Feder (University of Maryland) Dr Rob Shalloo (Imperial College London) Roman Walczak (University of Oxford)

Presentation materials