Abstracts Brochure - CERN

MOPCH037
MOPCH038
MOPCH039
MOPCH040
26-Jun-06 16:00 - 18:00 MOPCH — Poster Session
Status of the Novosibirsk High Power Terahertz FEL
N. Vinokurov, D. Kayran, B.A. Knyazev, E.I. Kolobanov, V.V.
Kotenkov, V.V. Kubarev, G. Kulipanov, A.V. Kuzmin, A.S. Lakhtychkin,
A.N. Matveenko, L.E. Medvedev, S.V. Miginsky, L.A. Mironenko,
A.D. Oreshkov, V. Ovchar, V.M. Popik, T.V. Salikova, M.A.
Scheglov, S.S. Serednyakov, O.A. Shevchenko, A.N. Skrinsky (BINP
SB RAS)
56
The first stage of Novosibirsk high power
free electron laser (FEL) was commissioned
in 2003. It is based on the normal conducting
CW energy recovery linac (ERL). Now the
FEL provides electromagnetic radiation in
the wavelength range 120 - 230 micron. The
maximum average power is 400 W. The minimum
measured line width is 0.3%, which is
close to the Fourier Transform limit. Four user stations are in operation now. Manufacturing of the second stage of
the FEL (based on the four-turn ERL) is in progress.
Predicted Parameters of the Second Stage of High Power Novosibirsk FEL
The first stage of Novosibirsk high power ter-
A.V. Kuzmin, O.A. Shevchenko, N. Vinokurov (BINP SB RAS) ahertz FEL was successfully put into operation
in 2003*. The measured parameters of
the FEL turned out to be in a good agreement with calculations [2]. The second and the third stages of the FEL are
under construction now. The beam energy at the second stage will be about 20 MeV and the wavelength will change
in the range 40-80 µm. In this paper we present the design parameters for the second stage FEL. The simulations
were carried out with the help of 1-D code based on macroparticles. This code was previously used for the first stage
simulations**.
*E. A. Antokhin et al. NIM A528 (2004) p.15-18.**A. V. Kuzmin et al. NIM A543 (2005) p.114-117.
Wavelength Tuning at Novosibirsk Terahertz Free Electron Laser
S.S. Serednyakov, A.N. Matveenko, O.A. Shevchenko, N. Vinokurov
(BINP SB RAS)
Novosibirsk FEL operates in the wavelength
range 120-230 micron. The wavelength tuning,
which is necessary for some radiation
users, is provided by variation of the undu-
lator magnetic field value. It requires changing of the end steering coils of undulators and the field in facing threepole
wiggler between undulators. Moreover due to the strong undulator focusing, the variation of magnetic lattice is
desired during the wavelength scanning. The wavelength variation algorithm is described in this paper.
Simulations for the FEL Test Facility at MAX-lab within EUROFEL
S. Thorin, M. Brandin, S. Werin (MAX-lab) M. Abo-Bakr, J. Bahrdt,
K. Goldammer (BESSY GmbH)
Within the EUROFEL project a High Gain
Harmonic Generation Free Electron Laser
will be constructed at MAX-lab in collaboration
with BESSY. The electron bunches will
be created in the existing MAX-lab injector and transported to the inside of the MAX II ring where the FEL undulators
will be located. To predict FEL performance and stability, simulations of the photo injector, linac, recirculator,
transport and undulator sections as well as start to end simulations have been carried out.