TY  - JOUR
AU  - Wood, Jonathan Christopher
AU  - Boulton, Lewis
AU  - Beinortaite, Judita
AU  - Björklund Svensson, Jonas Halfdan
AU  - Bohlen, Simon
AU  - Boyle, Gregory James
AU  - Garland, Matthew James
AU  - Gonzalez Caminal, Pau
AU  - Lindstroem, Carl Andreas
AU  - Loisch, Gregor
AU  - Mewes, Steven Mathis
AU  - Parikh, Trupen
AU  - Pena Asmus, Felipe Lars
AU  - Poder, Kristjan
AU  - Schröder, Sarah
AU  - Thévenet, Maxence
AU  - Wesch, Stephan
AU  - Osterhoff, Jens
AU  - D'Arcy, Richard
TI  - Bright electron bunches from a plasma-wakefield accelerator with a steep density down-ramp
JO  - Nature Communications
VL  - 17
IS  - 1
SN  - 2041-1723
CY  - [London]
PB  - Springer Nature
M1  - PUBDB-2022-04720
SP  - 1588
PY  - 2026
AB  - 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.
LB  - PUB:(DE-HGF)16
DO  - DOI:10.1038/s41467-026-69283-6
UR  - https://bib-pubdb1.desy.de/record/482311
ER  -