Description
Chairs: Matteo Solfaroli, Markus Zerlauth
Scientific Secretaries: Mirko Pojer, David Nisbet
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Benjamin Todd26/01/2016, 08:30Session 3: LHC Hardware Performance
Numerous fault tracking concepts and requirements were defined by the LHC Availability Working Group (AWG) during the study of LHC Run 1 availability (2010-2012). During Long-Shutdown 1 (LS1), these requirements were converted into an Accelerator Fault Tracker (AFT) tool, by a BE/CO, BE/OP and TE/MPE initiative. This paper presents an overview of the AWG concepts and requirements for...
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Andrea Apollonio26/01/2016, 08:55Session 3: LHC Hardware Performance
Increasing LHC availability is one of the key challenges for improving luminosity production in the next years and particularly in view of HL-LHC. Both hardware performance and beam-related effects have an impact on the achieved availability and are directly influenced by the LHC operating conditions (e.g. in terms of radiation levels, number of beam-induced quenches, etc.). A review of the...
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Gerard Ferlin (CERN)26/01/2016, 09:30Session 3: LHC Hardware Performance
The first part of the presentation summarizes the cryogenic performance and availability for 2015 and the expected performance for 2016 after completion of the YETS activities. The cryogenic configuration used in 2015, observed issues and proposed improvements will be detailed. The second part of the presentation will focus on cryogenic power studies (design, installed, available) in order...
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Reiner Denz26/01/2016, 10:30Session 3: LHC Hardware Performance
The contribution will review the upgrades to the LHC quench detection system (QDS) performed during LS1 and discuss the QDS dependability during LHC operation in 2015. The QDS performance with respect to reliability, availability and maintainability will be presented and analysed, including issues specific to the ion run. An account of the consolidation measures already successfully...
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Felix Rodriguez Mateos26/01/2016, 11:00Session 3: LHC Hardware Performance
From individual system tests and commissioning after LS1 up to operation with beam, the talk will start with a quick overview on the main phases that the LHC magnet circuits have experienced since the last Chamonix meeting. The main faults and events along the 2015 beam operation will be reported and classified according to system, frequency and impact to downtime. The systems and aspects...
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Valerie Montabonnet26/01/2016, 11:30Session 3: LHC Hardware Performance
The hardware performance of the LHC power converters during 2015 is presented. After a brief summary of the changes made during LS1, the performance of the power converters will be detailed by presenting the availability matrices of the different systems. The efficiency of the mitigations deployed during LS1 as well as the remaining observed failure modes are discussed. Finally, an outlook...
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Chiara Bracco26/01/2016, 16:45Session 4: LHC Hardware Performance20' + 10'
The most critical failure scenarios for LHC machine protection concern the injection and dump systems. In view of operation at higher energy and intensity and in light of the experience gained during Run 1, several upgrades were put in place to further enhance the reliability of these systems. Changes were applied both to the protection elements and the kickers (magnets,...
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Andy Butterworth26/01/2016, 17:15Session 4: LHC Hardware PerformanceThe RF and ADT underwent a number of consolidations and upgrades during LS1, including a major renovation of the ADT signal processing and the replacement of a degraded cavity module. The effect of these upgrades on 2015 performance will be reviewed. The system availability and operational issues encountered through the 2015 run will be detailed and the improvements being made during the YETS...Go to contribution page
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William Viganò26/01/2016, 17:4520' + 10'
The dependability of many beam instrumentation systems directly impact the operational efficiency of the CERN accelerator complex and the LHC in particular. While some are connected to the Beam Interlock System and have been designed with this in mind, others provide data essential for machine optimization, the absence of which can also potentially affect the availability...
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Jesper Nielsen26/01/2016, 18:30
In the Technical Infrastructure a major event is filed every time a technical incident causes a stop of one of CERNs accelerators. But how many did we record in 2015? And how did we do in 2015 compared to RUN 1 in 2012? We will also look closer into electrical perturbations and their causes, are they still as big an issue for the LHC as we think? Of course statistics are good and help us...
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Markus Brugger, Salvatore Danzeca26/01/2016, 19:00Session 4: LHC Hardware PerformanceThe talk will first provide a summary of the 2015 radiation levels and failures on the electronics focusing on the performed R2E activities that led to the improvements on the overall system failures. We will then focus on the strategy and goals for the next years and run3 operation era, identifying the parameters that have to be monitored in order to keep and improve the availability for the...Go to contribution page
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Rudiger Schmidt26/01/2016, 19:25Session 4: LHC Hardware PerformanceThe integrated luminosity for LHC depends on the time operating with colliding beams as well as on the peak luminosity. Different factors enter into the time that the LHC operates with colliding beams, this is discussed for operation at 6.5 TeV, and extrapolated to operation at 7 TeV. Independent of the operational energy, ideas to increase the LHC availability are presented. High availability...Go to contribution page