The properties of electron beams obtainable from plasma wakefield accelerators are largely determined by their injection into the plasma wave. Density downramps can facilitate injection of plasma electrons and are realized routinely in laser wakefield accelerators by gas-dynamic production of longitudinal downramp profiles. We show that density downramp injection is in fact a multidimensional process when operated below the spatiotemporal scales of the plasma wave. In beam-driven plasma waves, unlocking this interaction regime by microscopic plasma torches allows the generation of unique electron beams, such as planar counteroscillating twin beamlets. Our findings generalize density downramp injection and extend its capabilities, which may find applications ranging from radiation production to high-energy-physics research.
|Original language||English (US)|
|Journal||Physical Review Research|
|State||Published - Dec 8 2021|
Bibliographical noteKAUST Repository Item: Exported on 2022-06-01
Acknowledgements: The FACET E-210 plasma wakefield acceleration experiment was built and operated with support from UCLA [U.S. Department of Energy (DOE) Contract No. DESC0009914], RadiaBeam Technologies (DOE Contract No. DE-SC0009533), and the FACET E200 team and DOE under Contract No. DE-AC02-76SF00515. B.H., P.S., A.S., A.F.H., T.H., and A.B. were supported by the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (NeXource, ERC Grant Agreement No. 865877). The work was supported by STFC ST/S006214/1 PWFA-FEL, H2020 ERC NeXource, and EPSRC (Grant No. EP/N028694/1). J.R.C. acknowledges support from the National Science Foundation under Award No. PHY 1734281. M.D.L acknowledges support from the U.S. DOE Office of High Energy Physics under Award No. DE-SC0017906. This work used computational resources of the National Energy Research Scientific Computing Center, which is supported by DOE Contract No. DE-AC02-05CH11231, and of the Supercomputing Laboratory at King Abdullah University of Science & Technology in Thuwal, Saudi Arabia.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.