Multi-GeV Electron Acceleration in Wakefields Strongly Driven by Oversized Laser Spots-Reference-Cited by-同舟云学术

Multi-GeV Electron Acceleration in Wakefields Strongly Driven by Oversized Laser Spots

Published:2024-05-10 Issue:19 Volume:132 Page:
ISSN:0031-9007
Container-title:Physical Review Letters
language:en
Short-container-title:Phys. Rev. Lett.

Author:

Põder K.¹²^ORCID,Wood J. C.¹^ORCID,Lopes N. C.¹³^ORCID,Cole J. M.¹^ORCID,Alatabi S.¹,Backhouse M. P.¹,Foster P. S.⁴,Hughes A. J.¹,Kamperidis C.¹⁵^ORCID,Kononenko O.²⁶^ORCID,Mangles S. P. D.¹^ORCID,Palmer C. A. J.²⁷^ORCID,Rusby D.⁴,Sahai A.¹,Sarri G.⁷^ORCID,Symes D. R.⁴,Warwick J. R.⁷,Najmudin Z.¹^ORCID

Affiliation:

1. The John Adams Institute for Accelerator Science, Imperial College, London SW7 2BZ, United Kingdom

2. Deutsches Elektronen-Synchrotron DESY, D-22607 Hamburg, Germany

3. GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal

4. Central Laser Facility, Rutherford Appleton Laboratory, Didcot OX11 0QX, United Kingdom

5. ELI-ALPS, ELI-HU Non-profit Ltd., Szeged, Hungary

6. LOA, ENSTA ParisTech-CNRS-École Polytechnique-Université Paris-Saclay, 828 Boulevard des Maréchaux, 91762 Palaiseau Cedex, France

7. Queen’s University Belfast, Belfast, BT7 1NN, United Kingdom

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 Emax>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.

Published by the American Physical Society

2024

Funder

Science and Technology Facilities Council

Engineering and Physical Sciences Research Council

Central Laser Facility, Science and Technology Facilities Council

Publisher

American Physical Society (APS)

Link

http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevLett.132.195001/fulltext

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