Abstracts Brochure - CERN

MOPCH — Poster Session 26-Jun-06 16:00 - 18:00
Realistic Beam Loss Estimation from the Nuclear Scattering at the RCS Charge-exchange
Foil
We have developed simulation tools for
the realistic beam loss estimation at
the RCS(rapid cycling synchrotron) of J-
PARC(Japan Proton Accelerator Research
P.K. Saha, H. Hotchi, Y. Irie, F. Noda (JAEA/J-PARC) H. Harada
(Hiroshima University)
Complex). The present simulation concerns an accurate estimation of the beam loss caused by the nuclear scattering
at the charge-exchange foil during the multi turn injection period. It can also figure out the loss point in the ring,
so would become very useful for the maintenance and optimization as well. The simulation code GEANT together
with the SAD(Strategic Accelerator Design) have been used for the present purpose. In this paper, detail simulation
method including the result will be discussed.
Design of the Collimation System for Beijing Spallation Neutron Source Rapid Cycling
Synchrotron
The collimation system for Beijing Spallation
Neutron Source Rapid Cycling Synchrotron T. Wei (IHEP Beijing)
is expected to have a collimation efficiency
over 90% of the proton beam halo. The transverse collimation system consists of a two-stage collimation system
cleaning the transverse halo and longitudinal collimation system cleaning those particles whose dispersion more
than 1%. We use Monte Carlo simulation to acquire high efficiency. The material, location and shape of collimators
have been carefully chosen to maximize the collimation efficiency.
Energy Deposition in Adjacent LHC Superconducting Magnets from Beam Loss at LHC
Transfer Line Collimators
Injection intensities for the LHC are over
an order of magnitude above the damage V. Kain, S. Beavan, Y. Kadi (CERN)
threshold. The collimation system in the two
transfer lines is designed to dilute the beam sufficiently to avoid damage in case of accidental beam loss or mis-steered
beam. To maximise the protection for the LHC most of the collimators are located in the last 300 m upstream of the
injection point where the transfer lines approach the LHC machine. To study the issue of possible quenches following
beam loss at the collimators the entire collimation section in one of the lines, TI 8, together with the adjacent part of
the LHC has been modeled in FLUKA. The simulated energy deposition in the LHC for worst-case accidental losses
as well as for losses expected during a normal filling is presented. The operational implications are discussed.
Studies of Availabilities of High-current Proton Accelerator with Transverse Focusing by
Electron Beam
An initial section of some super-power proton
linac is considered usually on the RFQ-
B.I. Ivanov, V.I. Butenko, M.G. Shulika, A.M. Yegorov (NSC/KIPT)
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