Conveners
Session 4 - Other Issues affecting Beam Commissioning I
- Stephan (Chairman) Russenschuck (AT-MEL)
- Rhodri (Scientific Secretary) Jones (AB-BDI)
Mr
Davide Bozzini
(CERN)
18/01/2005, 14:00
Other Issues affecting Beam Commissioning I
The electrical integrity and the safe operation of the
superconducting electrical
circuits are crucial issues for the successful commissioning with
and without beam
and for the operation of the LHC machine. Beam based measurements
may require in-
situ verification of the magnet polarities. The detection,
diagnostics, repair and
re-qualification of electrical faults and the...
Dr
Stephan Russenschuck
(CERN AT-MEL-EM)
18/01/2005, 14:25
Other Issues affecting Beam Commissioning I
The presentation will cover the polarity definitions and the
conventions in the
different coordinate systems used for beam tracking, field
computation and magnetic
measurements. In particular the definition of what a skew dipole
magnet is, could
lead to misunderstanding. Continuity problems in the spool piece bus
bars which
could affect corrector magnet polarity are addressed....
Reiner Denz
(CERN AT-MEL-PM)
18/01/2005, 14:50
Other Issues affecting Beam Commissioning I
Reiner Denz
Quench Protection System (QPS)
After a short introduction to the LHC Quench Protection System
(QPS), an overview
about the expected availability and reliability of the system will
be given. The
consequences of equipment failures and the required intervention
times for repair
will be discussed. The capabilities of the QPS data acquisition
system with respect
to...
Dr
Trevor Linnecar
(CERN)
18/01/2005, 15:15
Other Issues affecting Beam Commissioning I
At nominal beam intensities, the loss of control of even a single RF
cavity will
require an immediate beam dump to avoid severe damage to RF
equipment. During LHC
beam commissioning, different beam structures and in particular
lower intensities
will be used. In this case it is possible that not all RF failures
require a beam
dump and that the beam may survive even if perturbed....
Dr
Eva Barbara Holzer
(CERN)
18/01/2005, 16:00
Other Issues affecting Beam Commissioning I
This presentation will deal with the main beam instrumentation
systems
required for the initial commissioning period. The emphasis will be
on
the set-up and testing of the hardware involved, in particular BPM
polarity checks, the determination of BLM interlock limits, tests of
the electronics
and calibration procedures. The amount of final testing for which
the beam is
required...
Markus Brugger
(CERN SC/RP)
18/01/2005, 16:25
Other Issues affecting Beam Commissioning I
oral
The radiation protection of the personnel who will perform
interventions in the beam
cleaning insertions and install different phases of machine
components is mandatory
and includes the design of equipment and the establishment of work
procedures. Dose
rates are expected to reach values at which any maintenance has to
be planned in
advance and the design adopted in order to...
Dr
Luigi Scibile
(TS/CSE)
18/01/2005, 16:50
Other Issues affecting Beam Commissioning I
The latest discussions on the LHC Access Safety system, held during the first
sessions of the Access Safety Working Group, have emphasized the goal of the system
to prevent personal exposure to radiological hazards. The personnel protection
against electrical hazards is outside the scope of the project. From the control
room point of view, the LHC Access Safety System will authorize,...
