High-resolution sampling of beam-driven plasma wakefields

S. Schröder (), C. A. Lindstrøm, S. Bohlen, G. Boyle, R. D’Arcy, S. Diederichs, M. J. Garland, P. Gonzalez, A. Knetsch, V. Libov, P. Niknejadi, Kris Põder, L. Schaper, B. Schmidt, B. Sheeran, G. Tauscher, S. Wesch, J. Zemella, M. Zeng and J. Osterhoff
Additional contact information
S. Schröder: Deutsches Elektronen-Synchrotron DESY
C. A. Lindstrøm: Deutsches Elektronen-Synchrotron DESY
S. Bohlen: Deutsches Elektronen-Synchrotron DESY
G. Boyle: Deutsches Elektronen-Synchrotron DESY
R. D’Arcy: Deutsches Elektronen-Synchrotron DESY
S. Diederichs: Deutsches Elektronen-Synchrotron DESY
M. J. Garland: Deutsches Elektronen-Synchrotron DESY
P. Gonzalez: Deutsches Elektronen-Synchrotron DESY
A. Knetsch: Deutsches Elektronen-Synchrotron DESY
V. Libov: Deutsches Elektronen-Synchrotron DESY
P. Niknejadi: Deutsches Elektronen-Synchrotron DESY
Kris Põder: Deutsches Elektronen-Synchrotron DESY
L. Schaper: Deutsches Elektronen-Synchrotron DESY
B. Schmidt: Deutsches Elektronen-Synchrotron DESY
B. Sheeran: Deutsches Elektronen-Synchrotron DESY
G. Tauscher: Deutsches Elektronen-Synchrotron DESY
S. Wesch: Deutsches Elektronen-Synchrotron DESY
J. Zemella: Deutsches Elektronen-Synchrotron DESY
M. Zeng: Deutsches Elektronen-Synchrotron DESY
J. Osterhoff: Deutsches Elektronen-Synchrotron DESY

Nature Communications, 2020, vol. 11, issue 1, 1-6

Abstract: Abstract Plasma-wakefield accelerators driven by intense particle beams promise to significantly reduce the size of future high-energy facilities. Such applications require particle beams with a well-controlled energy spectrum, which necessitates detailed tailoring of the plasma wakefield. Precise measurements of the effective wakefield structure are therefore essential for optimising the acceleration process. Here we propose and demonstrate such a measurement technique that enables femtosecond-level (15 fs) sampling of longitudinal electric fields of order gigavolts-per-meter (0.8 GV m−1). This method—based on energy collimation of the incoming bunch—made it possible to investigate the effect of beam and plasma parameters on the beam-loaded longitudinally integrated plasma wakefield, showing good agreement with particle-in-cell simulations. These results open the door to high-quality operation of future plasma accelerators through precise control of the acceleration process.

Date: 2020
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DOI: 10.1038/s41467-020-19811-9

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