Dr
Stefano Redaelli
(CERN)
12/04/2005, 14:00
Equipment and beam monitoring - connected to the beam interlocks
Beam losses along the 27 km long LHC ring can now be predicted with longitudinal
accuracy of 10 centimetres. Simulations are based on a multi-turn tracking of
secondary and tertiary halo particles, as produced in the collimation insertions, and
on a detailed model of the LHC aperture. The expected losses at the LHC in various
operational conditions are compared with the proposed locations...
Dr
Bernd Dehning
(CERN)
12/04/2005, 14:30
Equipment and beam monitoring - connected to the beam interlocks
The LHC beam loss monitoring system is designed to protect the equipment against
damage and quenches caused by lost protons. Proton initiated secondary shower
particles are detected by ionisation chambers and secondary emission detectors
located outside of the cryostat. The measured shower intensities are compared with
energy and loss duration depending quench level values and a signal is...
Dr
Christos Zamantzas
(CERN)
12/04/2005, 15:05
Equipment and beam monitoring - connected to the beam interlocks
The BLM system is one of the most critical elements for the
protection of the LHC.
For this reason, its design must ensure a reliable, failsafe, secure
and fast system.
The complete system consists of: Detectors placed at various
locations around the
ring. Radiation tolerant tunnel electronics, the CFC cards, which
are responsible for
acquiring, digitising, and transmitting the...
Dr
Markus Zerlauth
(CERN)
12/04/2005, 16:00
Equipment and beam monitoring - connected to the beam interlocks
The objective is to safely extract the beam after quenches and failures in the
powering or quench protection system. Failures could be detected by different
systems, depending on the origin of the failure. The role of quench protection
system, power converters and powering interlock systems will be discussed. Timescales
for the extraction of the beams after different failure cases will be...
Dr
Jorg Wenninger
(CERN)
12/04/2005, 16:20
Equipment and beam monitoring - connected to the beam interlocks
Good orbit control is very critical for the LHC due to the tight aperture at
injection and the stringent orbit stability constraints from collimators and
absorbers. A real-time orbit feedback system will be used to ensure adequate orbit
stability during all operational phases. While the orbit feedback is important for
operational efficiency, it cannot be used for machine protection...
Dr
David Belohrad
(CERN)
12/04/2005, 16:40
Equipment and beam monitoring - connected to the beam interlocks
At LHC the Beam Current Transformers (BCT) have an important role for machine
protection. The BCTs will be used to derive to important signals that will be
distributed with high reliability using the 'Safe LHC Parameter' system: the 'beam
presence' flag and the 'safe beam' flag. Both signals are derived from the measured
beam intensity in the LHC rings. This presentation will outline the...
