Journal Article

PUBDB-2024-07650

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Multi-GeV Electron Acceleration in Wakefields Strongly Driven by Oversized Laser Spots

Põder, K. (Corresponding author)DESY* ; Wood, J. C.DESY* ; Lopes, N. C.Extern* ; Cole, J. M. ; Alatabi, S. ; Backhouse, M. P. ; Foster, P. S. ; Hughes, A. J. ; Kamperidis, C. ; Kononenko, O.DESY* ; Mangles, S. P. D.Extern*XFEL.EU* ; Palmer, C. A. J.Extern* ; Rusby, D. ; Sahai, A. ; Sarri, G.Extern* ; Symes, D. R. ; Warwick, J. R. ; Najmudin, Z.

2024
APS College Park, Md.

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Please use a persistent id in citations: doi:10.1103/PhysRevLett.132.195001  doi:10.3204/PUBDB-2024-07650

Abstract: Experiments were performed on laser wakefield acceleration in the highly nonlinear regime. With laser powers P<250 TW and using an initial spot size larger than the matched spot size for guiding, we were able to accelerate electrons to energies E$_{max}$ >2.5 GeV, in fields exceeding 500 GV m$^{−1}$, with more than 80 pC of charge at energies E>1 GeV. Three-dimensional particle-in-cell simulations show that using an oversized spot delays injection, avoiding beam loss as the wakefield undergoes length oscillation. This enables injected electrons to remain in the regions of highest accelerating fields and leads to a doubling of energy gain as compared to results from using half the focal length with the same laser.

Keyword(s): electron: acceleration ; oscillation: length ; laser: wake field ; dimension: 3 ; accelerator: wake field ; beam: injection ; beam: size ; nonlinear ; beam loss ; energy: yield

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Contributing Institute(s):

1. Plasma Accelerators (MPA)

Research Program(s):

1. 621 - Accelerator Research and Development (POF4-621) (POF4-621)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2024

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; ; ; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; Nationallizenz ; SCOAP3 sponsored Journal ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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