High efficiency tapered free-electron lasers with a prebunched electron beam
Abstract
In this study we analyze the high gain, high efficiency tapered free-electron laser amplifier with a prebunched electron beam. Simple scaling laws are derived for the peak output power and extraction efficiency and verified using 1D simulations. These studies provide useful analytical expressions which highlight the benefits resulting from fine control of the initial conditions of the system, namely the initial electron beam bunching and input seed radiation. When time-dependent effects are included, the sideband instability is known to limit the radiation amplification due to particle detrapping. We discuss two different approaches to mitigate the sideband growth via 1-D time dependent simulations. We find that a more aggressive taper enabled by strong prebunching and a modulation of the resonance condition are both effective methods for suppressing the sideband instability growth rate.
- Authors:
- Publication Date:
- Research Org.:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1409242
- Alternate Identifier(s):
- OSTI ID: 1418207
- Grant/Contract Number:
- SC0009983; SC0009914; SC0017102; AC02-76SF00515
- Resource Type:
- Published Article
- Journal Name:
- Physical Review Accelerators and Beams
- Additional Journal Information:
- Journal Name: Physical Review Accelerators and Beams Journal Volume: 20 Journal Issue: 11; Journal ID: ISSN 2469-9888
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 43 PARTICLE ACCELERATORS
Citation Formats
Emma, C., Sudar, N., Musumeci, P., Urbanowicz, A., and Pellegrini, C.. High efficiency tapered free-electron lasers with a prebunched electron beam. United States: N. p., 2017.
Web. doi:10.1103/PhysRevAccelBeams.20.110701.
Emma, C., Sudar, N., Musumeci, P., Urbanowicz, A., & Pellegrini, C.. High efficiency tapered free-electron lasers with a prebunched electron beam. United States. https://doi.org/10.1103/PhysRevAccelBeams.20.110701
Emma, C., Sudar, N., Musumeci, P., Urbanowicz, A., and Pellegrini, C.. Fri .
"High efficiency tapered free-electron lasers with a prebunched electron beam". United States. https://doi.org/10.1103/PhysRevAccelBeams.20.110701.
@article{osti_1409242,
title = {High efficiency tapered free-electron lasers with a prebunched electron beam},
author = {Emma, C. and Sudar, N. and Musumeci, P. and Urbanowicz, A. and Pellegrini, C.},
abstractNote = {In this study we analyze the high gain, high efficiency tapered free-electron laser amplifier with a prebunched electron beam. Simple scaling laws are derived for the peak output power and extraction efficiency and verified using 1D simulations. These studies provide useful analytical expressions which highlight the benefits resulting from fine control of the initial conditions of the system, namely the initial electron beam bunching and input seed radiation. When time-dependent effects are included, the sideband instability is known to limit the radiation amplification due to particle detrapping. We discuss two different approaches to mitigate the sideband growth via 1-D time dependent simulations. We find that a more aggressive taper enabled by strong prebunching and a modulation of the resonance condition are both effective methods for suppressing the sideband instability growth rate.},
doi = {10.1103/PhysRevAccelBeams.20.110701},
journal = {Physical Review Accelerators and Beams},
number = 11,
volume = 20,
place = {United States},
year = {2017},
month = {11}
}
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https://doi.org/10.1103/PhysRevAccelBeams.20.110701
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Cited by: 16 works
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