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Title: Attosecond x-ray free-electron lasers utilizing an optical undulator in a self-selection regime

Abstract

Accelerator-based x-ray free-electron lasers (XFELs) are the latest addition to the revolutionary tools of discovery for the 21st century. The two major components of an XFEL are an accelerator-produced electron beam and a magnetic undulator, which tend to be kilometer-scale long and expensive. A proof-of-principle demonstration of free-electron lasing at 27 nm using beams from compact laser wakefield accelerators was shown recently by using a magnetic undulator. However, scaling these concepts to x-ray wavelengths is far from straightforward as the requirements on the beam quality and jitters become much more stringent. Here, we present an ultracompact scheme to produce tens of attosecond x-ray pulses with several GW peak power utilizing a novel aspect of the FEL instability using a highly chirped, prebunched, and ultrabright tens of MeV electron beam from a plasma-based accelerator interacting with an optical undulator. The FEL resonant relation between the prebunched period and the energy selects resonant electrons automatically from the highly chirped beam which leads to a stable generation of attosecond x-ray pulses. Furthermore, two-color attosecond pulses with subfemtosecond separation can be produced by adjusting the energy distribution of the electron beam so that multiple FEL resonances occur at different locations within the beam. Suchmore » a tunable coherent attosecond x-ray sources may open up a new area of attosecond science enabled by x-ray attosecond pump/probe techniques.« less

Authors:
ORCiD logo; ORCiD logo; ; ORCiD logo; ; ; ; ; ;
Publication Date:
Research Org.:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
2281769
Alternate Identifier(s):
OSTI ID: 2323392
Grant/Contract Number:  
AC02-76SF00515; DESC0010064; 644405; 7350365:1
Resource Type:
Published Article
Journal Name:
Physical Review Accelerators and Beams
Additional Journal Information:
Journal Name: Physical Review Accelerators and Beams Journal Volume: 27 Journal Issue: 1; Journal ID: ISSN 2469-9888
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; laser wakefield acceleration; particle acceleration in plasmas; ultrafast phenomena; x-ray beams and optics; lasers; plasma acceleration and new acceleration techniques; synchrotron and free-electron lasers; x-ray lasers

Citation Formats

Xu, Xinlu, Liu, Jiaxin, Dalichaouch, Thamine, Tsung, Frank S., Zhang, Zhen, Huang, Zhirong, Hogan, Mark J., Yan, Xueqing, Joshi, Chan, and Mori, Warren B. Attosecond x-ray free-electron lasers utilizing an optical undulator in a self-selection regime. United States: N. p., 2024. Web. doi:10.1103/PhysRevAccelBeams.27.011301.
Xu, Xinlu, Liu, Jiaxin, Dalichaouch, Thamine, Tsung, Frank S., Zhang, Zhen, Huang, Zhirong, Hogan, Mark J., Yan, Xueqing, Joshi, Chan, & Mori, Warren B. Attosecond x-ray free-electron lasers utilizing an optical undulator in a self-selection regime. United States. https://doi.org/10.1103/PhysRevAccelBeams.27.011301
Xu, Xinlu, Liu, Jiaxin, Dalichaouch, Thamine, Tsung, Frank S., Zhang, Zhen, Huang, Zhirong, Hogan, Mark J., Yan, Xueqing, Joshi, Chan, and Mori, Warren B. Wed . "Attosecond x-ray free-electron lasers utilizing an optical undulator in a self-selection regime". United States. https://doi.org/10.1103/PhysRevAccelBeams.27.011301.
@article{osti_2281769,
title = {Attosecond x-ray free-electron lasers utilizing an optical undulator in a self-selection regime},
author = {Xu, Xinlu and Liu, Jiaxin and Dalichaouch, Thamine and Tsung, Frank S. and Zhang, Zhen and Huang, Zhirong and Hogan, Mark J. and Yan, Xueqing and Joshi, Chan and Mori, Warren B.},
abstractNote = {Accelerator-based x-ray free-electron lasers (XFELs) are the latest addition to the revolutionary tools of discovery for the 21st century. The two major components of an XFEL are an accelerator-produced electron beam and a magnetic undulator, which tend to be kilometer-scale long and expensive. A proof-of-principle demonstration of free-electron lasing at 27 nm using beams from compact laser wakefield accelerators was shown recently by using a magnetic undulator. However, scaling these concepts to x-ray wavelengths is far from straightforward as the requirements on the beam quality and jitters become much more stringent. Here, we present an ultracompact scheme to produce tens of attosecond x-ray pulses with several GW peak power utilizing a novel aspect of the FEL instability using a highly chirped, prebunched, and ultrabright tens of MeV electron beam from a plasma-based accelerator interacting with an optical undulator. The FEL resonant relation between the prebunched period and the energy selects resonant electrons automatically from the highly chirped beam which leads to a stable generation of attosecond x-ray pulses. Furthermore, two-color attosecond pulses with subfemtosecond separation can be produced by adjusting the energy distribution of the electron beam so that multiple FEL resonances occur at different locations within the beam. Such a tunable coherent attosecond x-ray sources may open up a new area of attosecond science enabled by x-ray attosecond pump/probe techniques.},
doi = {10.1103/PhysRevAccelBeams.27.011301},
journal = {Physical Review Accelerators and Beams},
number = 1,
volume = 27,
place = {United States},
year = {Wed Jan 17 00:00:00 EST 2024},
month = {Wed Jan 17 00:00:00 EST 2024}
}

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