Journal
PHYSICAL REVIEW LETTERS
Volume 127, Issue 18, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.127.184801
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Funding
- UK Science and Technology Facilities Council (STFC UK) [ST/P002048/1, ST/V001655/1]
- Engineering and Physical Sciences Research Council (EPSRC UK) [EP/V006797/1, EP/R513295/1]
- Air Force Office of Scientific Research [FA9550-18-1-7005]
- European Union's Horizon 2020 research and innovation programme [653782]
- plasma HEC Consortium [EPSRC] [EP/R029149/1]
- UK EPSRC [EP/G054950/1, EP/G056803/1, EP/G055165/1, EP/M022463/1]
- UKRI
- EPSRC [EP/M022463/1, EP/V006797/1, EP/G056803/1, EP/G055165/1] Funding Source: UKRI
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This work presents a new approach for driving GeV-scale plasma accelerators using long laser pulses, modulating the temporal phase of a high-energy driver through controlled linear processes. Particle-in-cell simulations demonstrate the feasibility of accelerating electrons to 0.65 GeV energy using specific parameters in a plasma channel with high axial density.
We describe a new approach for driving GeV-scale plasma accelerators with long laser pulses. We show that the temporal phase of a long, high-energy driving laser pulse can be modulated periodically by copropagating it with a low-amplitude plasma wave driven by a short, low-energy seed pulse. Compression of the modulated driver by a dispersive optic generates a train of short pulses suitable for resonantly driving a plasma accelerator. Modulation of the driver occurs via well-controlled linear processes, as confirmed by good agreement between particle-in-cell (PIC) simulations and an analytic model. PIC simulations demonstrate that a 1.7 J, 1 ps driver, and a 140 mJ, 40 fs seed pulse can accelerate electrons to energies of 0.65 GeV in a plasma channel with an axial density of 2.5 x 1017 cm(-3). This work opens a route to high repetition-rate, GeV-scale plasma accelerators driven by thin-disk lasers, which can provide joule-scale, picosecond-duration laser pulses at multikilohertz repetition rates and high wall-plug efficiencies.
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