Journal Article

PUBDB-2022-04720

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Bright electron bunches from a plasma-wakefield accelerator with a steep density down-ramp

Wood, J. C. (Corresponding author)DESY* ; Boulton, L.Extern* ; Beinortaite, J.DESY* ; Björklund Svensson, J. H.DESY* ; Bohlen, S.DESY* ; Boyle, G. J.Extern*DESY* ; Garland, M. J.DESY* ; Gonzalez Caminal, P.Extern*DESY* ; Lindstroem, C. A.DESY* ; Loisch, G.Extern*DESY* ; Mewes, S. M.Extern*DESY* ; Parikh, T.DESY* ; Pena Asmus, F. L.DESY* ; Poder, K.DESY* ; Schröder, S.DESY* ; Thévenet, M.DESY* ; Wesch, S.DESY* ; Osterhoff, J.DESY* ; D'Arcy, R.DESY*

2026
Springer Nature [London]

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Please use a persistent id in citations: doi:10.1038/s41467-026-69283-6  doi:10.3204/PUBDB-2022-04720

Abstract: High-brightness electron bunches drive fundamental research in particlephysics and photon science. Key to achieving a high brightness is to have a lowtransverse emittance, which ensures that the bunch can be tightly focussed. Inradiofrequency accelerators a low initial emittance can be rapidly degradeddue to space charge forces, which are greatly diminished once the electronbunch attains a relativistic velocity. A plasma accelerator can maintain orders-of-magnitude higher accelerating fields than radiofrequency accelerators,while multiple techniques exist to create a low emittance electron bunchdirectly inside the plasma accelerator structure. Plasma accelerators thereforeoffer a possibility to create high-brightness bunches in wakefields driven evenby low-quality drive bunches. Here we demonstrate the injection and gigavolt-per-metre acceleration of electron bunches with mm-mrad normalised emit-tance, O(10 pC/MeV) spectral density and per-cent-level energy spread, all withexcellent reproducibility.

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Contributing Institute(s):

1. Technol. zukünft. Teilchenph. Experim. (FTX)
2. Plasma Acceleration and Laser Group (MPL)

Research Program(s):

1. 621 - Accelerator Research and Development (POF4-621) (POF4-621)
2. 6G2 - FLASH (DESY) (POF4-6G2) (POF4-6G2)

Experiment(s):

1. FLASHForward

Appears in the scientific report 2026

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