Effects of Tapered Betafunction in the LCLS Undulators [electronic resource].

Published:: Washington, D.C. : United States. Dept. of Energy, 2005.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:: 3 pages : digital, PDF file
Additional Creators:: Stanford Linear Accelerator Center, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

The Linac Coherent Light Source (LCLS) is an X-ray free-electron laser (FEL) project based on the SLAC linac [1]. With its nominal set of electron beam, focusing and undulator parameters, it is designed to achieve SASE saturation at an undulator length of about 100 m with an average power of 10 GW. In order to keep the electron beam focused in the undulators, a FODO lattice is integrated along the entire length of the undulators. Nominally, the quadrupole strengths are chosen to produce nearly constant betafunction and beam size along the undulator, optimized for the FEL interaction in the exponential growth regime. Since these quadrupoles are electromagnetic, it is possible to adjust the individual quadrupole strength to vary the betafunction and the beam size along the undulator, tailoring the FEL interaction in the start-up and the saturation regimes. In this paper, we present simulation studies of the tapered betafunction in the LCLS undulator and discuss the generated X-ray properties.

Report Numbers:

E 1.99:slac-pub-11457
slac-pub-11457

Subject(s):

Particle Accelerators

Other Subject(s):

Note:

Published through SciTech Connect.
09/30/2005.
"slac-pub-11457"
Contributed to 27th International Free Electron Laser Conference (FEL 2005), Stanford, California, 21-26 Aug 2005.
Huang, Z.; Emma, P.; Goldammer, K.

Funding Information:

AC02-76SF00515

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