Abstracts Brochure - CERN

MOPCH — Poster Session 26-Jun-06 16:00 - 18:00
Design of a New Preinjector for the MAX Recirculator to be Used in EUROFEL
The MAX-lab recirculator injector will be
equipped with a new preinjector system. The
aim is to reduce the emittance, increase the
charge and achieve a proper timing between
S. Werin, M. Brandin, T. Hansen, D. Kumbaro, L. Malmgren, S.
Thorin (MAX-lab) J. Bahrdt (BESSY GmbH)
accelerator and laser systems. All is aimed at the MAX-lab test facility for HG built in collaboration with BESSY in
the EUROFEL program. The preinjector system consists of a photo cathode RF-gun with an emittance compensating
solenoid. Special issues regard the injection of the new beam into the beam path of the MAX recirculator and the
conservation of beam parameters.
Ultra Low Emittance Pre-Accelerated RF Gun Development
The development of a new ultra bright electron
gun could have a considerable impact
on the design, performances and overall cost
of LINAC based X-ray light-sources. Today
most of the X-rays Free-Electron Laser
J.-Y. Raguin, A. Anghel, R.J. Bakker, M. Dehler, R. Ganter, C. Gough,
S. Ivkovic, E. Kirk, F. Le Pimpec, S.C. Leemann, K.L. Li, M. Paraliev,
M. Pedrozzi, L. Rivkin, V. Schlott, H. Sehr, A.F. Wrulich (PSI)
projects are based on state of the art RF guns, which aim at a normalized electron beam emittance close to 1 mm.mrad.
In this paper we report on the progress made at PSI towards a hybrid Low Emittance Gun (LEG) capable of producing
a beam with an emittance below 0.1 mm mrad. To reduce the intrinsic thermal emittance at the LEG cathode the
electrons will be extracted from nano-structured field-emitters. Fast acceleration in a diode configuration with a
gradient up to 250MV/m over 4 mm will be used to minimize the emittance dilution due to the strong space charge
forces at very low energy. The diode is immediately followed by a two-frequency L-Band RF structure, which brings
the energy up to 3-5 MeV while limiting the emittance blow-up due to the non-linearity of the RF field.
An Optimization Study for a FEL Oscillator at TAC Test Facility
Recently, conceptual design of the Turkic Accelerator
Center (TAC) proposal was completed.
The main goal of this proposal is
a charm factory that consists of a linac-ring
Ö.M. Mete, Ö. Karsli, O. Yavas (Ankara University, Faculty of
Engineering)
type electron-positron collider. In addition, synchrotron radiation from the positron ring and free electron laser from
the electron linac are proposed. The project related with this proposal has been accepted by the Turkish government.
It is planned that the Technical Design Report of TAC will have been written in the next three years. In this period,
an infrared oscillator free electron laser (IR FEL) will be constructed as a test facility for TAC. 20 and 50 MeV electron
energies will be used to obtain infrared FEL. The main parameters of the electron linacs, the optical cavities and
the FEL were determined. The possible use of obtained laser beam in basic and applied research areas such as
biotechnology, nanotechnology, semiconductors and photo chemistry were discussed.
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