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Title: Tailoring of an electron-bunch current distribution via space-to-time mapping of a transversely shaped, photoemission-laser pulse

Abstract

Temporally shaped electron bunches at ultrafast time scales are foreseen to support an array of applications including the development of small-footprint accelerator-based coherent light sources or as probes for, e.g., ultrafast electron-diffraction. We demonstrate a method where a transversely segmented electron bunch produced via photoemission from a transversely patterned laser distribution is transformed into an electron bunch with modulated temporal distribution. In essence, the presented transformation enables the mapping of the transverse laser distribution on a photocathode surface to the temporal coordinate and provides a proof-of-principle experiment of the method proposed in Reference [, , , and , Intense Superradiant X Rays from a Compact Source Using a Nanocathode Array and Emittance Exchange, Phys. Rev. Lett. 108, 263904 (2012)] as a path toward the realization of compact coherent x-ray sources, albeit at a larger timescale. The presented experiment is validated against numerical simulations and the versatility of the concept, e.g., to tune the current-distribution parameters, is showcased. Although our work focuses on the generation of electron bunches arranged as a temporal comb it is applicable to other temporal shapes.

Authors:
ORCiD logo [1];  [2];  [3];  [3]; ORCiD logo [4];  [3];  [3]
  1. Northern Illinois Univ., DeKalb, IL (United States). Northern Illinois Center for Accelerator & Detector Development; Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Argonne Wakefield Accelerator; Tsinghua Univ., Beijing (China). Dept. of Engineering Physics and Accelerator Lab.
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Argonne Wakefield Accelerator
  4. Northern Illinois Univ., DeKalb, IL (United States). Northern Illinois Center for Accelerator & Detector Development; Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States); UChicago, LLC., Argonne, IL (United States); Northern Illinois Univ., DeKalb, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1573122
Alternate Identifier(s):
OSTI ID: 1573235
Grant/Contract Number:  
AC02-76SF00515; SC0011831; SC0018656; AC02-06CH11357; AC02-07CH11359
Resource Type:
Published Article
Journal Name:
Physical Review Accelerators and Beams
Additional Journal Information:
Journal Volume: 22; Journal Issue: 11; Journal ID: ISSN 2469-9888
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS

Citation Formats

Halavanau, A., Gao, Q., Conde, M., Ha, G., Piot, P., Power, J. G., and Wisniewski, E. Tailoring of an electron-bunch current distribution via space-to-time mapping of a transversely shaped, photoemission-laser pulse. United States: N. p., 2019. Web. doi:10.1103/PhysRevAccelBeams.22.114401.
Halavanau, A., Gao, Q., Conde, M., Ha, G., Piot, P., Power, J. G., & Wisniewski, E. Tailoring of an electron-bunch current distribution via space-to-time mapping of a transversely shaped, photoemission-laser pulse. United States. doi:10.1103/PhysRevAccelBeams.22.114401.
Halavanau, A., Gao, Q., Conde, M., Ha, G., Piot, P., Power, J. G., and Wisniewski, E. Tue . "Tailoring of an electron-bunch current distribution via space-to-time mapping of a transversely shaped, photoemission-laser pulse". United States. doi:10.1103/PhysRevAccelBeams.22.114401.
@article{osti_1573122,
title = {Tailoring of an electron-bunch current distribution via space-to-time mapping of a transversely shaped, photoemission-laser pulse},
author = {Halavanau, A. and Gao, Q. and Conde, M. and Ha, G. and Piot, P. and Power, J. G. and Wisniewski, E.},
abstractNote = {Temporally shaped electron bunches at ultrafast time scales are foreseen to support an array of applications including the development of small-footprint accelerator-based coherent light sources or as probes for, e.g., ultrafast electron-diffraction. We demonstrate a method where a transversely segmented electron bunch produced via photoemission from a transversely patterned laser distribution is transformed into an electron bunch with modulated temporal distribution. In essence, the presented transformation enables the mapping of the transverse laser distribution on a photocathode surface to the temporal coordinate and provides a proof-of-principle experiment of the method proposed in Reference [, , , and , Intense Superradiant X Rays from a Compact Source Using a Nanocathode Array and Emittance Exchange, Phys. Rev. Lett. 108, 263904 (2012)] as a path toward the realization of compact coherent x-ray sources, albeit at a larger timescale. The presented experiment is validated against numerical simulations and the versatility of the concept, e.g., to tune the current-distribution parameters, is showcased. Although our work focuses on the generation of electron bunches arranged as a temporal comb it is applicable to other temporal shapes.},
doi = {10.1103/PhysRevAccelBeams.22.114401},
journal = {Physical Review Accelerators and Beams},
number = 11,
volume = 22,
place = {United States},
year = {2019},
month = {11}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevAccelBeams.22.114401

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