Conveners
Session 3 - Cryogenic and Vacuum Issues affecting Beam Commissioning
- Noël (Chairman) Hilleret (AT-VAC)
- Luigi (Scientific Secretary) Serio (AT-ACR)
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Dr Germana Riddone (CERN AT-ACR), Mr Paul Cruikshank (CERN AT-VAC)18/01/2005, 09:00Cryogenic and Vacuum Issues affecting Beam CommissioningThe 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...Go to contribution page
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Dr Vincent Baglin (CERN)18/01/2005, 09:25Cryogenic and Vacuum Issues affecting Beam CommissioningThe 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...Go to contribution page
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Dr germana riddone (CERN)18/01/2005, 09:50Cryogenic and Vacuum Issues affecting Beam CommissioningThe 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...Go to contribution page
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Mr Antonio Perin (AT/ACR)18/01/2005, 10:35Cryogenic and Vacuum Issues affecting Beam CommissioningAfter 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...Go to contribution page
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Mr Serge CLAUDET (CERN AT ACR)18/01/2005, 11:00Cryogenic and Vacuum Issues affecting Beam CommissioningLHC 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...Go to contribution page
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Mr Manel Sanmarti (AT-ACR, CERN)18/01/2005, 11:25Cryogenic and Vacuum Issues affecting Beam CommissioningThe 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...Go to contribution page