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Title: Coherent x rays with tunable time-dependent polarization

Abstract

We describe a method for producing high power, coherent x-ray pulses from a free electron laser with femtosecond scale periodic temporal modulation of the polarization vector. This approach relies on the generation of a temporal intensity modulation after self seeding either by modulating the seed intensity or the beam current. After generating a coherent temporally modulated s -polarization pulse, the electron beam is delayed by half a modulation period and sent into a short orthogonally oriented undulator, serving as a p -polarization afterburner. We provide simulations of three configurations for realizing this polarization switching, namely, enhanced self seeding with an intensity modulation generated by 2 color self seeding, enhanced self seeding of a current modulated bunch, and regular self seeding of a current modulated bunch. Start to end simulations for the Linac Coherent Light Source-II are provided for the latter.

Authors:
ORCiD logo; ORCiD logo; ORCiD logo
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1730972
Alternate Identifier(s):
OSTI ID: 1768404
Grant/Contract Number:  
2017-SLAC-100382; AC02-76SF00515; 100498
Resource Type:
Published Article
Journal Name:
Physical Review Accelerators and Beams
Additional Journal Information:
Journal Name: Physical Review Accelerators and Beams Journal Volume: 23 Journal Issue: 12; Journal ID: ISSN 2469-9888
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; free-electron lasers; synchrotron radiation & free-electron lasers

Citation Formats

Sudar, N., Coffee, R., and Hemsing, E.. Coherent x rays with tunable time-dependent polarization. United States: N. p., 2020. Web. https://doi.org/10.1103/physrevaccelbeams.23.120701.
Sudar, N., Coffee, R., & Hemsing, E.. Coherent x rays with tunable time-dependent polarization. United States. https://doi.org/10.1103/physrevaccelbeams.23.120701
Sudar, N., Coffee, R., and Hemsing, E.. Wed . "Coherent x rays with tunable time-dependent polarization". United States. https://doi.org/10.1103/physrevaccelbeams.23.120701.
@article{osti_1730972,
title = {Coherent x rays with tunable time-dependent polarization},
author = {Sudar, N. and Coffee, R. and Hemsing, E.},
abstractNote = {We describe a method for producing high power, coherent x-ray pulses from a free electron laser with femtosecond scale periodic temporal modulation of the polarization vector. This approach relies on the generation of a temporal intensity modulation after self seeding either by modulating the seed intensity or the beam current. After generating a coherent temporally modulated s-polarization pulse, the electron beam is delayed by half a modulation period and sent into a short orthogonally oriented undulator, serving as a p-polarization afterburner. We provide simulations of three configurations for realizing this polarization switching, namely, enhanced self seeding with an intensity modulation generated by 2 color self seeding, enhanced self seeding of a current modulated bunch, and regular self seeding of a current modulated bunch. Start to end simulations for the Linac Coherent Light Source-II are provided for the latter.},
doi = {10.1103/physrevaccelbeams.23.120701},
journal = {Physical Review Accelerators and Beams},
number = 12,
volume = 23,
place = {United States},
year = {2020},
month = {12}
}

Journal Article:
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