Abstracts Brochure - CERN

WEPCH131
WEPCH132
WEPCH133
28-Jun-06 16:00 - 18:00 WEPCH — Poster Session
Development of Numerical Code for Self-consistent Wake Fields Analysis with Curved
Trajectory Electron Bunches
H. Kawaguchi (Muroran Institute of Technology, Department of
Electrical and Electronic Engineering) K. Fujita (Hokkaido University)
310
Strongly interacting phenomena of electromagnetic
radiation fields and ultra-relativistic
electron is one of great interests in accelerator
science such as in electron beam dynamics
at the bunch compressor. The phenomena
are described by time domain boundary value problem for the Lienard-Wiechert solutions. Authors develop a time
domain boundary element method for self-consistent wake fields analysis of electromagnetic fields and charged
particles. To use boundary integral equation for describing the electromagnetic fields, the time domain boundary
value problems for the Lienard-Wiechert solution can be naturally formulated and we can simulate the wake fields
phenomena with electron beam dynamics. In this paper, beam dynamics of curved trajectory electron bunches inside
uniform beam tube are numerically simulated by using 2.5 dimension time domain boundary element technique.
Various effects of closed beam tube for ultra-relativistic electron dynamics are considered comparing with the Lienard-
Wiechert solutions in free space.
Design Study of Dedicated Computer System for Wake Field Analysis with Time Domain
Boundary Element Method
K. Fujita, T. Enoto (Hokkaido University) H. Kawaguchi (Muroran
Institute of Technology, Department of Electrical and Electronic
Engineering)
Time domain boundary element method
(TDBEM) has advantages of dispersion free
calculations and modeling of curved beam
trajectories in wake field analysis compared
to conventional methods. These advantages
give us powerful possibilities for analysis of beam dynamics due to CSR in bunch compressors of next-generation
accelerators. On the other hand, the TDBEM also has a serious difficulty of large computational costs. In this paper,
a dedicated computer system for wake field analysis with the TDBEM is proposed as one of solutions for high performance
computing (HPC) technologies. Recent remarkable progress of LSI hardware design environments such as
HDL compiler tools and large scale FPGAs enables us to make up computer hardware systems with very low cost in
a short development period. The authors have been working in design studies of the TDBEM dedicated computer
system on such LSI design environments. This paper presents a system design and VHDL simulations of a wake field
analysis machine based on the TDBEM.
Beam Extraction System of the IC-100 Cyclotron
O.N. Borisov, B. Gikal, G. Gulbekyan, V.A. Melnikov, V.I. Mironov,
A. Sidorov (JINR) V.V. Seleznev (JINR/LHE)
The IC-100 cyclotron is designed for the acceleration
of heavy ions (Z/A=0.175) to energy
W=1.1 MeV/amu. At present the new
beam extraction system is realized. Extrac-
tion system consist the electrostatic deflector and two passive focusing magnetic channels. The results of numerical
simulation and experiments are present.