Effect of electron-beam energy chirp on signatures of radiation reaction in laser-based experiments

J. Magnusson; T. G. Blackburn; E. Gerstmayr; E. E. Los; M. Marklund; C. P. Ridgers; S. P.D. Mangles

doi:10.1103/PhysRevAccelBeams.26.104002

Effect of electron-beam energy chirp on signatures of radiation reaction in laser-based experiments

J. Magnusson
, T. G. Blackburn
, E. Gerstmayr
, E. E. Los
, M. Marklund^*
, C. P. Ridgers^*
, S. P.D. Mangles

^*Corresponding author for this work

School of Mathematics and Physics

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

113 Downloads (Pure)

Abstract

Current experiments investigating radiation reaction employ high energy electron beams together with tightly focused laser pulses in order to reach the quantum regime, as expressed through the quantum nonlinearity parameter χ. Such experiments are often complicated by the large number of latent variables, including the precise structure of the electron bunch. Here we examine a correlation between the electron spatial and energy distributions, called an energy chirp, investigate its significance to the laser-electron beam interaction and show that the resulting effect cannot be trivially ignored when analyzing current experiments. In particular, we show that the energy chirp has a large effect on the second central moment of the electron energy, but a lesser impact on the first electron energy moment or the photon critical energy. These results show the importance of improved characterization and control over electron bunch parameters on a shot-to-shot basis in such experiments.

Original language	English
Article number	104002
Number of pages	8
Journal	Physical Review Accelerators and Beams
Volume	26
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevAccelBeams.26.104002
Publication status	Published - 27 Oct 2023

Bibliographical note

Funding Information:
The research is supported by the Swedish Research Council Grants No. 2013-4248, No. 2016-03329, No. 2020-06768 (M. M.), the Knut and Alice Wallenberg Foundation (J. M., M. M.), the Engineering and Physical Sciences Research Council UK Grants No. EP/V049461/1 (C. P. R.), No. EP/V049186/1 (E. G.), and No. EP/V049577/1 (S. P. D. M), and by Horizon 2020 funding under European Research Council (ERC) Grant Agreement No. 682399. The simulations were performed on resources provided by the Swedish National Infrastructure for Computing (SNIC) at HPC2N.

Publisher Copyright:
© 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

ASJC Scopus subject areas

Nuclear and High Energy Physics
Physics and Astronomy (miscellaneous)
Surfaces and Interfaces

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Effect of electron-beam energy chirp on signatures of radiation reaction in laser-based experiments
Copyright 2023 the authors. This is an open access article published under a Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
Final published version, 1.3 MBLicence: CC BY

Cite this

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title = "Effect of electron-beam energy chirp on signatures of radiation reaction in laser-based experiments",

abstract = "Current experiments investigating radiation reaction employ high energy electron beams together with tightly focused laser pulses in order to reach the quantum regime, as expressed through the quantum nonlinearity parameter χ. Such experiments are often complicated by the large number of latent variables, including the precise structure of the electron bunch. Here we examine a correlation between the electron spatial and energy distributions, called an energy chirp, investigate its significance to the laser-electron beam interaction and show that the resulting effect cannot be trivially ignored when analyzing current experiments. In particular, we show that the energy chirp has a large effect on the second central moment of the electron energy, but a lesser impact on the first electron energy moment or the photon critical energy. These results show the importance of improved characterization and control over electron bunch parameters on a shot-to-shot basis in such experiments.",

author = "J. Magnusson and Blackburn, \{T. G.\} and E. Gerstmayr and Los, \{E. E.\} and M. Marklund and Ridgers, \{C. P.\} and Mangles, \{S. P.D.\}",

note = "Funding Information: The research is supported by the Swedish Research Council Grants No. 2013-4248, No. 2016-03329, No. 2020-06768 (M. M.), the Knut and Alice Wallenberg Foundation (J. M., M. M.), the Engineering and Physical Sciences Research Council UK Grants No. EP/V049461/1 (C. P. R.), No. EP/V049186/1 (E. G.), and No. EP/V049577/1 (S. P. D. M), and by Horizon 2020 funding under European Research Council (ERC) Grant Agreement No. 682399. The simulations were performed on resources provided by the Swedish National Infrastructure for Computing (SNIC) at HPC2N. Publisher Copyright: {\textcopyright} 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the {"}https://creativecommons.org/licenses/by/4.0/{"}Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.",

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AU - Marklund, M.

AU - Ridgers, C. P.

AU - Mangles, S. P.D.

N1 - Funding Information: The research is supported by the Swedish Research Council Grants No. 2013-4248, No. 2016-03329, No. 2020-06768 (M. M.), the Knut and Alice Wallenberg Foundation (J. M., M. M.), the Engineering and Physical Sciences Research Council UK Grants No. EP/V049461/1 (C. P. R.), No. EP/V049186/1 (E. G.), and No. EP/V049577/1 (S. P. D. M), and by Horizon 2020 funding under European Research Council (ERC) Grant Agreement No. 682399. The simulations were performed on resources provided by the Swedish National Infrastructure for Computing (SNIC) at HPC2N. Publisher Copyright: © 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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N2 - Current experiments investigating radiation reaction employ high energy electron beams together with tightly focused laser pulses in order to reach the quantum regime, as expressed through the quantum nonlinearity parameter χ. Such experiments are often complicated by the large number of latent variables, including the precise structure of the electron bunch. Here we examine a correlation between the electron spatial and energy distributions, called an energy chirp, investigate its significance to the laser-electron beam interaction and show that the resulting effect cannot be trivially ignored when analyzing current experiments. In particular, we show that the energy chirp has a large effect on the second central moment of the electron energy, but a lesser impact on the first electron energy moment or the photon critical energy. These results show the importance of improved characterization and control over electron bunch parameters on a shot-to-shot basis in such experiments.

AB - Current experiments investigating radiation reaction employ high energy electron beams together with tightly focused laser pulses in order to reach the quantum regime, as expressed through the quantum nonlinearity parameter χ. Such experiments are often complicated by the large number of latent variables, including the precise structure of the electron bunch. Here we examine a correlation between the electron spatial and energy distributions, called an energy chirp, investigate its significance to the laser-electron beam interaction and show that the resulting effect cannot be trivially ignored when analyzing current experiments. In particular, we show that the energy chirp has a large effect on the second central moment of the electron energy, but a lesser impact on the first electron energy moment or the photon critical energy. These results show the importance of improved characterization and control over electron bunch parameters on a shot-to-shot basis in such experiments.

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Effect of electron-beam energy chirp on signatures of radiation reaction in laser-based experiments

Abstract

Bibliographical note

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