Status of UCLA Helical Permanent-Magnet Inverse Free Electron Laser

Journal Article · Thu Jan 22 00:00:00 EST 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3080955· OSTI ID:21255267

Knyazik, A; Tikhoplav, R; Frederico, J T; Affolter, M; Rosenzweig, J B ^[1]

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1. Department of Physics and Astronomy, UCLA, Los Angeles, California 90095 (United States)

A helical undulator, utilizing permanent-magnet of cylindrically symmetric (Halbach) geometry is being developed at UCLA's Neptune Facility. The initial prototype is a short 10 cm, 7 periods long helical undulator, designed to test the electron-photon coupling by observing the micro-bunching is currently being constructed. The Neptune IFEL facility utilizes a 15 MeV Photoinjector-generated electron beam of 0.5 nC interacting with CO{sub 2} of peak energy up to 100 J, estimated to have acceleration of 100 MeV/m. An Open Iris-Loaded Waveguide Structure (OILS) scheme which conserves laser mode size and wave fronts throughout the undulator, is utilized to avoid Gouy phase shift caused by focusing of the drive laser. Undulator design was tested by computer simulations Radia and Genesis 1.3. Coherent Transition Radiation and Coherent Cherenkov Radiation will be used for micro-bunching diagnostic. Currently permanent dipoles and their aluminum holders have been built, and the project is in its final state of assembly and undulator testing.

• OSTI ID: 21255267
• Journal Information: AIP Conference Proceedings, Vol. 1086, Issue 1; Conference: 13. advanced accelerator concepts workshop, Santa Cruz, CA (United States), 27 Jul - 2 Aug 2008; Other Information: DOI: 10.1063/1.3080955; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATION
ALUMINIUM
CARBON DIOXIDE
CHERENKOV RADIATION
COMPUTERIZED SIMULATION
DIPOLES
ELECTRON BEAMS
FOCUSING
FREE ELECTRON LASERS
GEOMETRY
LINEAR ACCELERATORS
MEV RANGE 10-100
MICROWAVE RADIATION
PERMANENT MAGNETS
PHASE SHIFT
PHOTON-ELECTRON COLLISIONS
TRANSITION RADIATION
UCLA
WAVEGUIDES
WIGGLER MAGNETS