Abstracts Brochure - CERN

MOPCH — Poster Session 26-Jun-06 16:00 - 18:00
high-current mode (100mA, 1psec) and short bunch mode (0.1psec) similar to 5GeV ERL facility proposed by Cornell
University.
Adjustable Input Coupler Development for Superconducting Accelerating Cavity
The waveguide and coaxial-type input couplers
for Energy Recovery Linac type injector
cavity electrodynamical and thermal simulation
results are presented. The devices are
M.V. Lalayan, M.A. Gusarova, A.A. Krasnov, N.P. Sobenin (MEPhI)
A.A. Zavadtsev, D.A. Zavadtsev (Introscan)
designed to feed the superconducting cavity with up to 500 kW RF power in continuous wave regime at 1.3 GHz
operating frequency. The cavity external quality factor adjustment is provided. The heat load to the cryogenic system
was lowered to a tolerable level by coupler design optimization.
A Project of a High-power FEL Driven by an SC ERL at KAERI
A project of a high-power FEL at Korea
Atomic Energy Research Institute is described.
The FEL is driven by a superconducting
energy recovery linac. The future
A.V. Bondarenko, S.V. Miginsky (BINP SB RAS) Y.H. Han, Y.U.
Jeong, B.C. Lee, S. H. Park (KAERI)
ERL will be connected to the existing machine without any modification. It consists of two 180-degree bents and two
straight sections: one is for the FEL, another for a Compton X-rays source. One can choose the regime controlling
the lenses. The total ERL is isochronous to avoid any problems with longitudinal beam instability. The total relative
emittance degradation through the whole machine is ? 1.5. The FEL will be based on a 2 m helical in-vacuum
undulator made of permanent magnets. One mirror of the optical cavity is blind and made of copper; the other one,
the outcoupler, is semi-transparent and made of CVD diamond. The expected average power is a few kW and the
tuning range 35. . .70 ?m.
Layout of an Accumulator and Decelerator Ring for FAIR
Antiproton physics and experiments with
rare isotope beams are major research fields
at FAIR. Antiproton physics requires the
accumulation of high intensity antiproton
P. Beller, K. Beckert, A. Dolinskii, F. Nolden, C. Peschke, M. Steck,
J. Yang (GSI)
beams. The accumulation of up to 10 11 antiprotons at 3 GeV is foreseen. This will be accomplished by the combination
of the collector ring CR for stochastic precooling and the specialized accumulator ring RESR. The accumulation
scheme in the RESR is based on the usage of a stochastic cooling system. The requirements of this cooling system
strongly affect the magnetic structure of the RESR. For experiments with short-lived rare isotope beams the RESR
serves the task of fast deceleration. Precooled rare isotope beams will be injected at 740 MeV/u and then decelerated
to energies between 100 and 400 MeV/u in less than 1 s. This contribution presents the ring design and lattice studies
relevant for both tasks of the ring as well as a description of the antiproton accumulation scheme.
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MOPCH072
MOPCH073
MOPCH074