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Energy depletion and re-acceleration of driver electrons in a plasma-wakefield accelerator

Peña, F. ; Lindstrøm, C. A. ; Beinortaitė, J. ; Björklund Svensson, J. LU orcid ; Boulton, L. ; Diederichs, S. ; Foster, B. ; Garland, J. M. ; González Caminal, P. and Loisch, G. , et al. (2024) In Physical Review Accelerators and Beams 27(11).
Abstract

For plasma-wakefield accelerators to fulfill their potential for cost effectiveness, it is essential that their energy-transfer efficiency be maximized. A key aspect of this efficiency is the near-complete transfer of energy, or depletion, from the driver electrons to the plasma wake. Achieving full depletion is limited by the process of re-acceleration, which occurs when the driver electrons decelerate to nonrelativistic energies, slipping backward into the accelerating phase of the wakefield and being subsequently re-accelerated. Such re-acceleration is unambiguously observed here for the first time. At this re-acceleration limit, we measure a beam driver depositing (57 ± 3)% of its energy into a 195-mm-long plasma. This suggests that... (More)

For plasma-wakefield accelerators to fulfill their potential for cost effectiveness, it is essential that their energy-transfer efficiency be maximized. A key aspect of this efficiency is the near-complete transfer of energy, or depletion, from the driver electrons to the plasma wake. Achieving full depletion is limited by the process of re-acceleration, which occurs when the driver electrons decelerate to nonrelativistic energies, slipping backward into the accelerating phase of the wakefield and being subsequently re-accelerated. Such re-acceleration is unambiguously observed here for the first time. At this re-acceleration limit, we measure a beam driver depositing (57 ± 3)% of its energy into a 195-mm-long plasma. This suggests that the energy-transfer efficiency of plasma accelerators could approach that of conventional accelerators.

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publishing date
type
Contribution to journal
publication status
published
in
Physical Review Accelerators and Beams
volume
27
issue
11
article number
043090
publisher
American Physical Society
external identifiers
  • scopus:85208680721
ISSN
2469-9888
DOI
10.1103/PhysRevResearch.6.043090
language
English
LU publication?
no
additional info
Publisher Copyright: © 2024 authors. Published by the American Physical Society.
id
6515162f-c87f-473f-92ed-6d990901d756
date added to LUP
2026-04-04 11:44:43
date last changed
2026-09-08 10:44:03
@article{6515162f-c87f-473f-92ed-6d990901d756,
  abstract     = {{<p>For plasma-wakefield accelerators to fulfill their potential for cost effectiveness, it is essential that their energy-transfer efficiency be maximized. A key aspect of this efficiency is the near-complete transfer of energy, or depletion, from the driver electrons to the plasma wake. Achieving full depletion is limited by the process of re-acceleration, which occurs when the driver electrons decelerate to nonrelativistic energies, slipping backward into the accelerating phase of the wakefield and being subsequently re-accelerated. Such re-acceleration is unambiguously observed here for the first time. At this re-acceleration limit, we measure a beam driver depositing (57 ± 3)% of its energy into a 195-mm-long plasma. This suggests that the energy-transfer efficiency of plasma accelerators could approach that of conventional accelerators.</p>}},
  author       = {{Peña, F. and Lindstrøm, C. A. and Beinortaitė, J. and Björklund Svensson, J. and Boulton, L. and Diederichs, S. and Foster, B. and Garland, J. M. and González Caminal, P. and Loisch, G. and Schröder, S. and Thévenet, M. and Wesch, S. and Wood, J. C. and Osterhoff, J. and D'Arcy, R.}},
  issn         = {{2469-9888}},
  language     = {{eng}},
  number       = {{11}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review Accelerators and Beams}},
  title        = {{Energy depletion and re-acceleration of driver electrons in a plasma-wakefield accelerator}},
  url          = {{http://dx.doi.org/10.1103/PhysRevResearch.6.043090}},
  doi          = {{10.1103/PhysRevResearch.6.043090}},
  volume       = {{27}},
  year         = {{2024}},
}