Observations of z-dependent microbunching harmonic intensities using COTR in a SASE FEL.

Conference · Tue Sep 24 00:00:00 EDT 2002

OSTI ID:801623

Lumpkin, A H; Biedron, S G; Dejus, R J; Berg, W J; Borland, M; Chae, Y C; Erdmann, M; Huang, Z; Kim, K -J; Li, Y; Lewellen, J W; Milton, S V; Moog, E; Sajaev, V; Yang, B X

The nonlinear generation of harmonics in a self-amplified spontaneous emission (SASE) free-electron laser (FEL) continues to be of interest. Complementary to such studies is the search for information on the electron beam microbunching harmonic components, which are revealed by coherent optical transition radiation (COTR) experiments. An initial z-dependent set of data has been obtained with the fundamental at 530 nm and the second harmonic at 265 nm. The latter data were collected after every other undulator in a nine-undulator string. These results are compared to estimates based on GINGER and an analytical model for nonlinear harmonic generation.

• Research Organization: Argonne National Lab., IL (US)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: W-31-109-ENG-38
• OSTI ID: 801623
• Report Number(s): ANL/AOD/CP-107854; TRN: US0205559
• Resource Relation: Conference: 24th International Free Electron Laser Conference and 9th FEL User Workshop (FEL 2002), Argonne, IL (US), 09/09/2002--09/13/2002; Other Information: PBD: 24 Sep 2002
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ELECTRON BEAMS
FREE ELECTRON LASERS
HARMONIC GENERATION
HARMONICS
SPICES
TRANSITION RADIATION
WIGGLER MAGNETS