Beam debunching due to ISR-induced energy diffusion
Abstract
One of the options for increasing longitudinal coherency of X-ray free electron lasers (XFELs) is seeding with a microbunched electron beam. Several schemes leading to significant amplitude of the beam bunching at X-ray wavelengths were recently proposed. All these schemes rely on beam optics having several magnetic dipoles. While the beam passes through a dipole, its energy spread increases due to quantum effects of synchrotron radiation. As a result, the bunching factor at small wavelengths reduces since electrons having different energies follow different trajectories in the bend. We rigorously calculate the reduction in the bunching factor due to incoherent synchrotron the radiation while the beam travels in an arbitrary beamline. Lastly, we apply general results to estimate reduction of harmonic current in common schemes proposed for XFEL seeding.
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE Laboratory Directed Research and Development (LDRD) Program
- OSTI Identifier:
- 1371667
- Alternate Identifier(s):
- OSTI ID: 1550340
- Report Number(s):
- LA-UR-12-23278
Journal ID: ISSN 0168-9002; TRN: US1702539
- Grant/Contract Number:
- AC52-06NA25396
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
- Additional Journal Information:
- Journal Volume: 870; Journal ID: ISSN 0168-9002
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; Accelerator Design, Technology, and Operations
Citation Formats
Yampolsky, Nikolai A., and Carlsten, Bruce E. Beam debunching due to ISR-induced energy diffusion. United States: N. p., 2017.
Web. doi:10.1016/j.nima.2017.06.023.
Yampolsky, Nikolai A., & Carlsten, Bruce E. Beam debunching due to ISR-induced energy diffusion. United States. https://doi.org/10.1016/j.nima.2017.06.023
Yampolsky, Nikolai A., and Carlsten, Bruce E. Tue .
"Beam debunching due to ISR-induced energy diffusion". United States. https://doi.org/10.1016/j.nima.2017.06.023. https://www.osti.gov/servlets/purl/1371667.
@article{osti_1371667,
title = {Beam debunching due to ISR-induced energy diffusion},
author = {Yampolsky, Nikolai A. and Carlsten, Bruce E.},
abstractNote = {One of the options for increasing longitudinal coherency of X-ray free electron lasers (XFELs) is seeding with a microbunched electron beam. Several schemes leading to significant amplitude of the beam bunching at X-ray wavelengths were recently proposed. All these schemes rely on beam optics having several magnetic dipoles. While the beam passes through a dipole, its energy spread increases due to quantum effects of synchrotron radiation. As a result, the bunching factor at small wavelengths reduces since electrons having different energies follow different trajectories in the bend. We rigorously calculate the reduction in the bunching factor due to incoherent synchrotron the radiation while the beam travels in an arbitrary beamline. Lastly, we apply general results to estimate reduction of harmonic current in common schemes proposed for XFEL seeding.},
doi = {10.1016/j.nima.2017.06.023},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
number = ,
volume = 870,
place = {United States},
year = {Tue Jun 20 00:00:00 EDT 2017},
month = {Tue Jun 20 00:00:00 EDT 2017}
}
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