TY  - JOUR
AU  - Põder, K.
AU  - Wood, J. C.
AU  - Lopes, N. C.
AU  - Cole, J. M.
AU  - Alatabi, S.
AU  - Backhouse, M. P.
AU  - Foster, P. S.
AU  - Hughes, A. J.
AU  - Kamperidis, C.
AU  - Kononenko, O.
AU  - Mangles, S. P. D.
AU  - Palmer, C. A. J.
AU  - Rusby, D.
AU  - Sahai, A.
AU  - Sarri, G.
AU  - Symes, D. R.
AU  - Warwick, J. R.
AU  - Najmudin, Z.
TI  - Multi-GeV Electron Acceleration in Wakefields Strongly Driven by Oversized Laser Spots
JO  - Physical review letters
VL  - 132
IS  - 19
SN  - 0031-9007
CY  - College Park, Md.
PB  - APS
M1  - PUBDB-2024-07650
SP  - 195001
PY  - 2024
AB  - 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<sub>max</sub> >2.5 GeV, in fields exceeding 500 GV m<sup>−1</sup>, 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.
KW  - electron: acceleration (INSPIRE)
KW  - oscillation: length (INSPIRE)
KW  - laser: wake field (INSPIRE)
KW  - dimension: 3 (INSPIRE)
KW  - accelerator: wake field (INSPIRE)
KW  - beam: injection (INSPIRE)
KW  - beam: size (INSPIRE)
KW  - nonlinear (INSPIRE)
KW  - beam loss (INSPIRE)
KW  - energy: yield (INSPIRE)
LB  - PUB:(DE-HGF)16
C6  - pmid:38804956
UR  - <Go to ISI:>//WOS:001240397300007
DO  - DOI:10.1103/PhysRevLett.132.195001
UR  - https://bib-pubdb1.desy.de/record/619457
ER  -