Conveners
Session 3 - Cryogenic and Vacuum Issues affecting Beam Commissioning
- Noël (Chairman) Hilleret (AT-VAC)
- Luigi (Scientific Secretary) Serio (AT-ACR)
Dr
Germana Riddone
(CERN AT-ACR), Mr
Paul Cruikshank
(CERN AT-VAC)
18/01/2005, 09:00
Cryogenic and Vacuum Issues affecting Beam Commissioning
The influence of leaks on the cryogenic performance will be discussed and, as a
consequence, different type of leaks will be defined: leaks that permit 200 days
continuous machine operation, leaks that can be tolerated but require special
measures, leaks that must be repaired. The various methods used to detect and locate
leaks in the QRL and in the magnet insulation vacuum will be...
Dr
Vincent Baglin
(CERN)
18/01/2005, 09:25
Cryogenic and Vacuum Issues affecting Beam Commissioning
The LHC beam vacuum system operates at cryogenic and at room temperature. Many
aspects such as the location, the level of the leak flux, the reparability, the
impact on the machine commissioning and operation shall be taken into account when
dealing with vacuum leaks. The detection of warm air leaks is a difficult but mostly
well mastered technology. Special attention will be paid to...
Dr
germana riddone
(CERN)
18/01/2005, 09:50
Cryogenic and Vacuum Issues affecting Beam Commissioning
The risks and benefits of shortcuts during the installation and commissioning
of
cryogenic equipments will be presented and analyzed. The talk will in general
try to
answer questions on what tests can be skipped and what are the
consequences. The
benefits and drawbacks of going directly for global system versus sub-system
testing
will also be investigated. Special attention...
Mr
Antonio Perin
(AT/ACR)
18/01/2005, 10:35
Cryogenic and Vacuum Issues affecting Beam Commissioning
After a brief description of the functionalities of a DFB for the magnets powering, the strategy of
transport, installation, commissioning and testing will be presented. The information that could
be obtained from the test in SM18 of the first DFB will be explained together with the possible
modification/consolidation to be performed during installation. The impact of DFB failures and...
Mr
Serge CLAUDET
(CERN AT ACR)
18/01/2005, 11:00
Cryogenic and Vacuum Issues affecting Beam Commissioning
LHC cryogenics at P4 will be briefly recalled and present cooling power availability
and possible limitations will be presented. The RF requirements in terms of
capacity,pressure stability, operating modes and possible coupling with LHC machine
operation and transients will also be analysed and discussed.
Possible alternative cooling options for RF operation and sector 3-4 boosting...
Mr
Manel Sanmarti
(AT-ACR, CERN)
18/01/2005, 11:25
Cryogenic and Vacuum Issues affecting Beam Commissioning
The functionalities, redundancy and possible failure scenarios of the cryogenic
system will be briefly presented. The reliability of components and the impact on
beam commissioning will be analyzed. Continuous versus cycled operation (thermal,
pressure, etc.) will be investigated together with the requirements and problems
related to the accessibility of components and radiation issues...
