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Seeding Coherent Radiation Sources with Sawtooth Modulation [electronic resource].

Published:
Washington, D.C. : United States. Dept. of Energy, 2012.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:
4 pages : digital, PDF file
Additional Creators:
SLAC National Accelerator Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary:
Seed radiation sources have the ability to increase longitudinal coherence, decrease saturation lengths, and improve performance of tapering, polarization control and other FEL features. Typically, seeding schemes start with a simple sinusoidal modulation, which is manipulated to provide bunching at a high harmonic of the original wavelength. In this paper, we consider seeding from sawtooth modulations. The sawtooth creates a clean phase space structure, providing a maximal bunching factor without the need for an FEL interaction. While a pure sawtooth modulation is a theoretical construct, it is possible to approach the waveform by combining two or more of the composite wavelengths. We give examples of sawtooth seeding for HGHG, EEHG and other schemes, and note that the sawtooth modulation may aid in suppression of the microbunching instability.
Report Numbers:
E 1.99:slac-pub-14719
slac-pub-14719
Subject(s):
Other Subject(s):
Note:
Published through SciTech Connect.
03/28/2012.
"slac-pub-14719"
Contributed to 33rd International Free Electron Laser Conference (FEL 2011), Shanghai, China, 22-26 Aug 2011.
Ratner, Daniel; Chao, Alex.
Funding Information:
AC02-76SF00515
View MARC record | catkey: 14668148