Mr
Ruediger Schmidt
(CERN)
20/01/2005, 15:00
Machine Protection Issues affecting Beam Commissioning
Safe operation of the LHC requires coherence across several systems
for machine
protection: collimators and beam absorbers, beam dumping system, beam
monitoring,
beam interlocks, etc. Beam operation requires beam permit that can
only be
established when all LHC systems are ready for beam operation.
Extraction of beam
from the SPS and transfer to the LHC requires correct settings of...
Dr
Ralph Assmann
(CERN)
20/01/2005, 15:30
Machine Protection Issues affecting Beam Commissioning
An inventory of all collimators and beam absorbers in the LHC ring is presented. The
required settings of the various devices are discussed, the roles in beam cleaning
and machine protection are explained and limitations are explored. A basic strategy
for commissioning of all collimators and absorbers is explained, including a
specification on the necessary prerequisites on optics,...
Dr
Stefano Redaelli
(CERN)
20/01/2005, 16:15
Machine Protection Issues affecting Beam Commissioning
The LHC aperture for the perfect machine and its dependence on various
optics imperfections are discussed. The optics tolerances required to meet
the desired performance of the LHC collimation system are given. These
studies are based on the results of tracking simulations of the beam halo
and on a detailed aperture model of the full LHC ring, with spatial
resolution of 10 cm over...
Dr
Rhodri Jones
(CERN)
20/01/2005, 16:40
Machine Protection Issues affecting Beam Commissioning
oral
The beam loss monitoring system will be the main instrument charged
with detecting and acting upon the majority of failures that could
lead to quenches or damage. In a few cases, however, additional
instrumentation is required to protect the machine.
Three such systems will be discussed along with their proposed
implementation,namely: the beam dump channel position interlock in
IR6,...
Dr
Jorg Wenninger
(CERN)
21/01/2005, 09:00
Machine Protection Issues affecting Beam Commissioning
oral
At the LHC the machine protection and interlock systems will be major
players that need to keep track with the evolution of the machine in
terms of beam energy and intensity. At the start of beam
commissioning, many protection systems will already be partially
commissioned. This presentation will outline the state of the various
protection systems at the start of beam commissioning and...
Dr
Paul Collier
(CERN)
21/01/2005, 09:25
Machine Protection Issues affecting Beam Commissioning
oral
The beams in the LHC can be intercepted by many different types of
objects moving into the vacuum chambers. These include devices
designed for beam monitoring,machine protection and for data taking
by the experiments. Moving these objects can only be permitted under
certain conditions. Interlocks should prevent quenches or even
damage in case of wrong actions. A complete inventory...
Dr
Jan Uythoven
(CERN)
21/01/2005, 09:50
Machine Protection Issues affecting Beam Commissioning
oral
The primary task of the machine protection system is to prevent
equipment damage. To guarantee the required system reliability the
subsystems have evolved in large andoften complex systems. As a
result the machine protection system could become a major cause of
machine downtime by triggering too many false beam dumps. The talk
will present the major components of the machine...
Dr
Andrzej SIEMKO
(CERN AT-MTM)
21/01/2005, 10:35
Machine Protection Issues affecting Beam Commissioning
An accurate prediction of the quench levels of the main ring superconducting magnets
will allow a preventive dump of the beam before the magnet quench based on beam loss
measurements with beam loss monitors, thus limiting the downtime of the machine. The
particle energy deposition in the coils is calculated by using simulation programs
like GEANT or FLUKA. The magnet quench level as a...
Verena Kain
(CERN)
21/01/2005, 11:00
Machine Protection Issues affecting Beam Commissioning
oral
The design of protection elements is based on assumptions on damage
levels, which are in general derived from computer simulations. A
dedicatedexperiment was carried out to cross-check the extracted
from the SPS in TT40, deliberate damage of material was done in a
controlled way. A simple geometry was chosen for the high-Z target
comprising several typical materials that are used in...
