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Laser-plasma acceleration beyond wave breaking

Journal Article · · Physics of Plasmas
DOI:https://doi.org/10.1063/5.0036627· OSTI ID:1761519
 [1];  [2];  [2];  [3];  [3];  [3];  [3];  [3]
  1. Univ. of Rochester, NY (United States). Lab. for Laser Energetics; Laboratory for Laser Energetics, University of Rochester
  2. Univ. de Lisboa (Portugal). GoLP/Inst. de Plasmas e Fusao Nuclear, Inst. Superior Tecnico
  3. Univ. of Rochester, NY (United States). Lab. for Laser Energetics

Laser wakefield accelerators rely on the extremely high electric fields of nonlinear plasma waves to trap and accelerate electrons to relativistic energies over short distances. When driven strongly enough, plasma waves break, trapping a large population of the background electrons that support their motion. Aside from limiting the maximum electric field, this trapping can lead to accelerated electron bunches with large energy spreads. Here we introduce a novel regime of plasma wave excitation and wakefield acceleration that allows for arbitrarily high electric fields while avoiding the deleterious effects of unwanted trapping. Here, the regime, enabled by spatiotemporal shaping of laser pulses, exploits the property that nonlinear plasma waves with superluminal phase velocities cannot trap charged particles and are therefore immune to wave breaking.

Research Organization:
Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Fusion Energy Sciences (FES)
Contributing Organization:
Laboratory for Laser Energetics, University of Rochester
Grant/Contract Number:
NA0003856; SC0016253; SC0021057
OSTI ID:
1761519
Report Number(s):
2020-185; 1612; 2565; 2020-185, 1612, 2565
Journal Information:
Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 1 Vol. 28; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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