Tapered undulator for SASE FELs

Conference · Fri Sep 14 00:00:00 EDT 2001

OSTI ID:788084

Fawley, William M; Huang, Zhirong; Kim, Kwang-Je; Vinokurov, Nikolai A

We discuss the use of tapered undulators to enhance the performance of free-electron lasers (FELs) based upon self-amplified spontaneous emission (SASE), where the radiation tends to have a relatively broad bandwidth, limited temporal phase coherence, and large amplitude fluctuations. Using the polychromatic FEL simulation code GINGER, we numerically demonstrate the effectiveness of a tapered undulator for parameters corresponding to the existing Argonne low-energy undulator test line (LEUTL) FEL. We also study possible tapering options for proposed x-ray FELs such as the Linac Coherent Light Source (LCLS).

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Director, Office of Science (US)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 788084
• Report Number(s): LBNL-48988; R&D Project: 455301; TRN: US0110649
• Resource Relation: Conference: 2001 International Free Electron Laser Conference, Darmstadt (DE), 08/20/2001--08/25/2001; Other Information: PBD: 14 Sep 2001
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
FREE ELECTRON LASERS
LIGHT SOURCES
LINEAR ACCELERATORS
PERFORMANCE
COMPUTERIZED SIMULATION
WIGGLER MAGNETS
G CODES