Abstracts Brochure - CERN

MOPLS — Poster Session 26-Jun-06 16:00 - 18:00
MOPLS — Poster Session
Large Scale Beam-beam Simulations for the CERN LHC Using Distributed Computing
We report on a large scale simulation of
beam-beam effects for the CERN Large W. Herr, E. McIntosh, F. Schmidt (CERN) D. Kaltchev (TRIUMF)
Hadron Collider (LHC). The stability of particles
which experience head-on and long-range beam-beam effects was investigated for different optical configurations
and machine imperfections. To cover the interesting parameter space required computing resources not available
at CERN. The necessary resources were available in the LHC@home project, based on the BOINC platform. At present,
this project makes more than 40000 hosts available for distributed computing. We shall discuss our experience using
this system during a simulation campaign of more than six months and describe the tools and procedures necessary
to ensure consistent results. The results from this extended study are presented and future plans are discussed.
The Study of the Machine-induced Background and its Applications at the LHC
We present the recent advances in the analysis
of the machine-induced background generation
and formation at the LHC. Different
aspects of the study of the machine back-
V. Talanov, I. Azhgirey, I. Baishev (IHEP Protvino) D. Macina, K.M.
Potter, E. Tsesmelis (CERN)
ground problem at the LHC are reviewed, including the background production at the different stages of the
machine operation, the role and influence on the background from the collimators in the experimental insertions and
the background shielding. The potential use of the machine background for the purposes of detector testing and
alignment is also discussed.
Tertiary Halo and Tertiary Background in the Low Luminosity Experimental Insertion IR8
of the LHC
In our report we present the results for numerical
simulation of tertiary halo and tertiary
background in the LHC. We study the
case of the proton losses in the betatron clean-
V. Talanov (IHEP Protvino) R.W. Assmann, D. Macina, K.M. Potter,
S. Redaelli, G. Robert-Demolaize, E. Tsesmelis (CERN)
ing insertion IR7 with the subsequent tertiary halo generation in the downstream experimental insertion IR8. We
analyze the formation of tertiary background in the experimental area of the IR8 and evaluate the performance of
the machine-detector interface shielding with respect to this source of the background. The results obtained are
compared with the previous estimates of the machine-induced background in the low luminosity insertions of the
LHC, and the balance between different sources of the background is discussed.
107
MOPLS001
MOPLS002
MOPLS003