Abstracts Brochure - CERN

WEPCH — Poster Session 28-Jun-06 16:00 - 18:00
Ion Beam Formation from Laser Ion Source for TWAC RFQ
Tera Watt Accumulator (TWAC) accelerator/storage
ring complex with the laser ion
source is in progress at ITEP*. The new injector
based on the RFQ and IH-type linac is
G. Kropachev, A.I. Balabin, T. Kulevoy, S. Minaev, A. Shumshurov,
S.A. Visotski (ITEP) A.P. Durkin (MRTI RAS)
under construction. The initial part of new TWAC injector consists of laser ion source, extraction system and LEBT
(low energy beam transport). The paper presents the simulation and optimization of ion source extraction system
executed to receive minimum beam emittance for fixed current. The results of LEBT investigation for ion beam
matching with RFQ entry conditions are presented as well. The LEBT based on electrostatic grid lenses is chosen.
*B. Yu et al. "Heavy ion fusion activities in ITEP", Nucl. Instr. and Meth. In Phys. Res., A 415 (1998), p. 20.
Nonlinear Characteristics of the TME Cell
The TME (Theoretical Minimum Emittance)
cell is being used now for designing the lat- V.A. Kvardakov, E. Levichev (BINP SB RAS)
tice of different storage rings (SR sources,
damping rings, FFAG accelerators, etc.). Strong sextupoles required to correct the natural chromaticity of the lattice
reduce the dynamic aperture. In the paper we consider the main features of the nonlinear perturbation strength and
its connection with the essential lattice parameters: horizontal emittance, betatron tunes, and natural chromaticity.
The analytical results are compared with the computer simulation.
To Lithium Lens Design Development
We would like to present a new approach to
design development of lithium lens, based on B.F. Bayanov, T.A. Vsevolozhskaya (BINP SB RAS)
the use of the stored experience and a new
technology, which permits to eliminate the problem of thin wall container for lithium lens body, meant to satisfy
the contradictory requirements for both the high mechanical stability and efficient heat conduction through together
with the high chemical resistivity to the lithium.
Further Development of Irradiation Field Forming Systems of Industrial Electron Accelerators
Electron beam irradiation field forming systems
where accelerated electron beam is N.G. Tolstun, A.S. Ivanov, V.P. Ovchinnikov, M.P. Svinin (NIIEFA)
scanned in a constant field of the elongated
bending magnets were developed in our institute more than 15 years ago and they have a number of advantages in
comparison with traditional ones. Since than they have been applied in two accelerators with energies 300 and 400
keV; version of the similar system with two electromagnets for two-side irradiation of flexible materials – in a number
of 750 keV high voltage accelerators ("Electron-10") successfully operating now in several industrial lines. Systems of
forming of electron beam irradiation field based on the same principle have been used in several projects, some of
them are already put into operation. Electron optic characteristics of such systems and their various modifications as
well as aspects of their possible usage are discussed in the paper.
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