BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Beam Interlocks DTSTART;VALUE=DATE-TIME:20090205T171000Z DTEND;VALUE=DATE-TIME:20090205T173000Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-4@cern.ch DESCRIPTION:Speakers: WENNINGER\, Jorg ()\nA large fraction of the MPS was commissioned in 2008 in view of the first LHC run\, and first attempts to automate test sequences were implemented. This presentation will present the commissioning plans for the MPS system in 2009 based on the 2008 exper ience. A possible planning of the tests will be presented\, including time estimates\, scheduling issues and compatibility with HWC. Controls requir ements will be outlined. MPS tests with beam will be discussed.\n\nhttp:// indico.cern.ch/contributionDisplay.py?contribId=4&sessionId=7&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=4&sessionId=7&c onfId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Consequences for safety of personnel following S34 DTSTART;VALUE=DATE-TIME:20090202T160000Z DTEND;VALUE=DATE-TIME:20090202T161500Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-8@cern.ch DESCRIPTION:Speakers: ROY\, Ghislain ()\nFollowing the accident in Sector 34\, some immediate and short term restrictions on personnel access have b een put in place. Some restrictions on specific operations have also been decided. Some of these restrictions went much beyond the previously agreed rules for access and powering but have been decided by precaution pending further investigation of the event. In the light of lessons learnt from t he S34 accident\, I will review the access conditions in different parts o f the LHC (surface\, tunnel and service areas\, experimental areas) and in various conditions of operation of the installation\, taking into account the electrical and cryogenics risks as well as beam conditions. In a seco nd part I will review some accident scenarios that have been or can be env isaged\, and will assess for these cases the adequacy of the access and in tervention rules presented before.\n\nhttp://indico.cern.ch/contributionDi splay.py?contribId=8&sessionId=1&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=8&sessionId=1&c onfId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Summary DTSTART;VALUE=DATE-TIME:20090206T130000Z DTEND;VALUE=DATE-TIME:20090206T150000Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-58@cern.ch DESCRIPTION:Speakers: MYERS\, Steve ()\nhttp://indico.cern.ch/contribution Display.py?contribId=58&sessionId=9&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=58&sessionId=9& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Injection and Beam Dump DTSTART;VALUE=DATE-TIME:20090205T174000Z DTEND;VALUE=DATE-TIME:20090205T180000Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-57@cern.ch DESCRIPTION:Speakers: UYTHOVEN\, Jan ()\nThe hardware changes and maintena nce actions on the LHC injection and beam dumping systems will be presente d. The requirements for equipment tests\, hardware commissioning and machi ne check-out will be given\, highlighting the dependence and the impact on other interfaced LHC equipment.\n\nhttp://indico.cern.ch/contributionDisp lay.py?contribId=57&sessionId=7&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=57&sessionId=7& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Insulation vacuum and beam vacuum overpressure release DTSTART;VALUE=DATE-TIME:20090203T160000Z DTEND;VALUE=DATE-TIME:20090203T162500Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-51@cern.ch DESCRIPTION:Speakers: PARMA\, Vittorio ()\nThere is evidence that the inci dent of 19th September caused a high pressure build-up inside the cryostat insulation vacuum which the existing overpressure devices could not conta in. As a result\, high longitudinal forces acting on the insulation vacuum barriers developed and broke the floor and the floor fixations of the SSS with vacuum barriers. The consequent large longitudinal displacements of the SSS damaged chains of adjacent dipole cryo-magnets. Estimates of the h elium mass flow and the pressure build- up experienced in the incident are presented together with the pressure build-up for an even more hazardous event\, the Maximum Credible Incident (MCI). The strategy of limiting the maximum pressure by the installation of addition pressure relieve devices is presented and discussed. \nBoth beam vacuum lines were ruptured during the incident in sector 3-4 giving rise to both mechanical damage and pollu tion of the system. The sequence\, causes and effects of this damage will be briefly reviewed. We will then analyse possible actions that could be t aken to minimize the impact of a similar incident on the operation of the LHC.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=51&sessionI d=3&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=51&sessionId=3& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Improved anchoring of SSS with vacuum barrier to avoid displacemen t DTSTART;VALUE=DATE-TIME:20090203T163500Z DTEND;VALUE=DATE-TIME:20090203T165500Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-52@cern.ch DESCRIPTION:Speakers: CAPATINA\, Ofelia ()\nAs presented in the previous s peech\, the incident in sector 3-4 of the LHC caused a high pressure build -up inside the cryostat insulation vacuum resulting in high longitudinal f orces acting on the insulation vacuum barriers. This resulted in braking f loor and floor fixations of the SSS with vacuum barrier. The strategy of i mproving anchoring of SSS with vacuum barrier to avoid displacement is pre sented and discussed.\n\nhttp://indico.cern.ch/contributionDisplay.py?cont ribId=52&sessionId=3&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=52&sessionId=3& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:What else did we learn? DTSTART;VALUE=DATE-TIME:20090202T115000Z DTEND;VALUE=DATE-TIME:20090202T121000Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-88@cern.ch DESCRIPTION:Speakers: POJER\, Mirko ()\nDifferently from its definition\, the Hardware Commissioning has required a massive support of Software appl ications\, which had in turn to be commissioned. Apart the control applica tions and the communication systems\, special software tools had to be dev eloped to rapidly and smoothly allow a safe circuit commissioning (sequenc er\, post-mortem\, circuit commissioning status\,...).\nThe first part of this talk will provide an overview of these instruments\, focusing on thei r importance during circuit test and the experience gained on them.\nThe s econd part will be devoted to the analysis of some "puzzlying and annoying " hardware problems that slowed down the commissioning and will possibly l imit our test rate in 2009.\n\nhttp://indico.cern.ch/contributionDisplay.p y?contribId=88&sessionId=0&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=88&sessionId=0& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Alternative scenarios for the current shutdown DTSTART;VALUE=DATE-TIME:20090204T080500Z DTEND;VALUE=DATE-TIME:20090204T082000Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-89@cern.ch DESCRIPTION:Speakers: FORAZ\, Katy ()\, COUPARD\, Julie ()\nAlternative op tions for the current shutdown will be presented. These options include wa rming up additional sectors to complete the consolidation activities. The potential impact of these revised schedules on the beam schedule in 2009\, as well as the length and timing of the following shutdown will also be p resented.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=89&ses sionId=4&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=89&sessionId=4& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Other systems – what needs to be done? Repair and reinstallation of other systems (standard QPS\, PC\, BLM\, Cryo\, Survey\, …) DTSTART;VALUE=DATE-TIME:20090203T095000Z DTEND;VALUE=DATE-TIME:20090203T101000Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-82@cern.ch DESCRIPTION:Speakers: MATTEO\, Solfaroli Camillocci ()\nAfter the incident occurred on the 19th September all equipment and systems (such as QPS rac ks\, PC\, BLM\, Cryo instrumentation control etc.) located in the tunnel\, especially in the incident affected area\, were removed from the tunnel i n order to allow an easy damage inspection. After a change or repair\, dur ing the re-installation phase\, all these equipments will be put back in t he tunnel and re-tested once connected to the others.\nIn this paper we po int out what are the needs of every system (and infrastructure: ventilatio n\, civil engineering\, control network...) and the activities to be done in order to avoid interference\, facilitate and optimize the process of re -commissioning of the Sector 34.\n\nhttp://indico.cern.ch/contributionDisp lay.py?contribId=82&sessionId=2&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=82&sessionId=2& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Experiments desiderata DTSTART;VALUE=DATE-TIME:20090206T073000Z DTEND;VALUE=DATE-TIME:20090206T075000Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-83@cern.ch DESCRIPTION:Speakers: FERRO-LUZZI\, Massimiliano ()\nIn this talk\, an att empt will be made to review the LHC experiments desiderata in the current LHC context. The impact on the physics program of the beam energy and inte grated luminosity shall be reminded. In particular\, the benefits and shor tcomings will be presented of a 900 GeV run and of a pilot run at a yet to be defined higher energy. A few run scenari for 2009 (and 2010) will be s ketched.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=83&sess ionId=8&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=83&sessionId=8& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Where are we with the current shutdown? DTSTART;VALUE=DATE-TIME:20090204T073000Z DTEND;VALUE=DATE-TIME:20090204T075500Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-80@cern.ch DESCRIPTION:Speakers: FORAZ\, Katy ()\, COUPARD\, Julie ()\nThe first shut down of the LHC machine started on the 17th of November 2008. In addition to typical shut-down interventions and the works already foreseen (e.g. ph ase 1 collimator installation)\, some additional consolidation work is nee ded. On top of this comes the work caused by the 19 September incident and the subsequent tests carried out in November and December. This talk will give an overview of the activities currently planned and the key drivers for overall length of the shutdown\, highlighting the critical points.\n\n http://indico.cern.ch/contributionDisplay.py?contribId=80&sessionId=4&conf Id=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=80&sessionId=4& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:How do we keep track of upgrades / changes? DTSTART;VALUE=DATE-TIME:20090204T084000Z DTEND;VALUE=DATE-TIME:20090204T090000Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-81@cern.ch DESCRIPTION:Speakers: SCHMIDT\, Rüdiger ()\nLayout and electrical circuit s of the LHC machine are well documented in the databases and the data has been used throughout hardware and beam commissioning. During the shutdown a number of changes will be made all around the accelerator\, to differen t systems. The presentation will address in what areas changes are expecte d and how the changes are (or are not) documented. Proposals will be made how to record and track the changes in order to avoid to use data that doe s not correspond to the as-built status when restarting the machine in Spr ing.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=81&sessionI d=4&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=81&sessionId=4& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Emergency preparedness DTSTART;VALUE=DATE-TIME:20090202T183000Z DTEND;VALUE=DATE-TIME:20090202T185000Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-86@cern.ch DESCRIPTION:Speakers: CENNINI\, Enrico ()\nOn September 19th 2008\, a tec hnical fault was at the centre of a sequence of events which hampered the performance of certain equipments of the LHC 3-4 sector. Once the first ef fects of this sequence of events were detected\, the behaviour of the CERN staff confronted to this complex and critical situation became the centre of the risk control process. During such a downward spiral the preparatio n of all stakeholders is essential and should respect the (apparently) bas ic principles of emergency preparedness. Preparedness towards normal opera tion of CERN facilities towards minor up to major emergency situations wil l be presented. \nThe main technical\, organisational and legal frameworks of the CERN emergency preparedness will be recalled\, highlighting the CE RN risk management and risk control strategy. Then\, the sequence of event s experienced by different stakeholders on September 19th will be reported \, thus starting the learned lessons process.\n\nhttp://indico.cern.ch/con tributionDisplay.py?contribId=86&sessionId=1&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=86&sessionId=1& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Electrical and calorimetric measurements and related software. DTSTART;VALUE=DATE-TIME:20090202T093000Z DTEND;VALUE=DATE-TIME:20090202T095000Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-87@cern.ch DESCRIPTION:Speakers: CATALAN LASHERAS\, Nuria ()\nDuring the incident of sector 3-4 on September 19th\, the temperature of a number of magnets incr eased over the expected values prior to the circuit failure. A review of the data logged during powering tests on all circuits indicated potential resistive splices in sectors 1-2 and 6-7. Calorimetric and electrical meas urements confirmed a high resistance in magnet B16.R1 and B32R6. Systemati c measurements have been performed in other cold sectors of the LHC during which the temperature increase and voltage across magnets were acquired a t different currents. Cryogenic subsectors on which the temperature incre ase was abnormal were equipped with precise voltmeters to detect eventual resistive splices in the bus-bars. The findings of the measurement campaig n will be shown as well as the plans to implement similar diagnostics as a routine check prior to powering the superconducting circuits of the LHC.\ n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=87&sessionId=0&c onfId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=87&sessionId=0& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Controls & software DTSTART;VALUE=DATE-TIME:20090205T103000Z DTEND;VALUE=DATE-TIME:20090205T104500Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-84@cern.ch DESCRIPTION:Speakers: HATZIANGELI\, Eugenia ()\nA large number of componen ts of the LHC controls infrastructure have been intensively exercised duri ng several dry runs and the injection synchronization tests in 2008\, in p reparation for the LHC start up with beam. All the prior tests were extrem ely useful to validate the basic functionality\, to identify areas of weak ness and to prepare the controls to a stable and well functioning infrastr ucture\, which supported the successful LHC start up. \nThis presentation will summarize the outcome of the controls commissioning with emphasis on major components like LSA\, Timing synchronization\, middleware\, logging\ , and Role Based Access\, the issues observed and the improvements to be i mplemented before the next LHC run in 2009.\n\nhttp://indico.cern.ch/contr ibutionDisplay.py?contribId=84&sessionId=6&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=84&sessionId=6& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Safety Organisation DTSTART;VALUE=DATE-TIME:20090202T162500Z DTEND;VALUE=DATE-TIME:20090202T165500Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-85@cern.ch DESCRIPTION:Speakers: ETHERIDGE\, John Robert ()\, SCHMIDT\, Rudiger ()\nS afety has been an integral part both for the installation and hardware com missioning phases of the LHC \nThe objective of this presentation will be to out line the new structure that is in place\, the general organization\ , introduce the key players\, provide an insight into the safety documenta tion that is available to help everyone\, explain what is required to carr y out any form of intervention in the underground areas and provide feed b ack on our strong and weak points.\n\nhttp://indico.cern.ch/contributionDi splay.py?contribId=85&sessionId=1&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=85&sessionId=1& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Running through the winter 2009/10? Is it just a cost issue? DTSTART;VALUE=DATE-TIME:20090204T082500Z DTEND;VALUE=DATE-TIME:20090204T083500Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-102@cern.ch DESCRIPTION:Speakers: BATZ\, Mario ()\nAs a complement to the previous tal k\, a number of questions\, that will need to be addressed in order to con sider LHC beam operation over the winter 2009-10\, will be raised.\n\nhttp ://indico.cern.ch/contributionDisplay.py?contribId=102&sessionId=4&confId= 45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=102&sessionId=4 &confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:SC Magnet (re)training DTSTART;VALUE=DATE-TIME:20090205T184000Z DTEND;VALUE=DATE-TIME:20090205T190000Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-100@cern.ch DESCRIPTION:Speakers: TODESCO\, Ezio ()\nWe will give an overview of the t raining of all the LHC superconducting magnets based on the experience acq uired diring the hardware commissioning. Using this information and the da ta relative to the test of individual magnets during manufacturing\, we wi ll give a view on the expected requirements for the training at 5 and 7 Te V.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=100&sessionId =7&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=100&sessionId=7 &confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Weaknesses of the MPS DTSTART;VALUE=DATE-TIME:20090204T183000Z DTEND;VALUE=DATE-TIME:20090204T185500Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-101@cern.ch DESCRIPTION:Speakers: HOLZER\, Bernhard ()\nThis report tries to solve an unsolvable problem: to foresee problems or incidents in the operation of t he LHC that are not covered by the machine protection or beam interlock s ystems. It is evident that this task is not easy to fulfil but nevertheles s what still can be done is to scrutinise the logic of the LHC machine pro tection system and to compare its structure with “unexpected” incident s that occurred in other large storage rings. Going through the history of these rings and mainly profiting from discussions with the experts\, this contribution summarises events that are normally not published in confere nce reports\, sometimes they are not even mentioned in internal papers. By the definition of the subject this reflection cannot be complete but ther e is hope that it will enlighten topics and failure scenarios that are wor th to be considered in the LHC operation.\n\nhttp://indico.cern.ch/contrib utionDisplay.py?contribId=101&sessionId=5&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=101&sessionId=5 &confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:The Sector 3-4 Incident DTSTART;VALUE=DATE-TIME:20090202T095500Z DTEND;VALUE=DATE-TIME:20090202T102500Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-36@cern.ch DESCRIPTION:Speakers: LEBRUN\, Philippe ()\nIn the days following the inci dent which occurred in Sector 3-4 of the LHC\, a Task Force was constitute d by experts from the relevant LHC systems\, with the mandate to establish the sequence of facts\, based on experimental observations and measuremen ts\, to analyse and explain the development of events\, in relation with d esign assumptions\, manufacturing and test data and risk analyses performe d\, and to recommend preventive and corrective actions for Sector 3-4 and others. This is the report of the Task Force.\n\nhttp://indico.cern.ch/con tributionDisplay.py?contribId=36&sessionId=0&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=36&sessionId=0& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Beam-based measurements DTSTART;VALUE=DATE-TIME:20090205T082000Z DTEND;VALUE=DATE-TIME:20090205T084000Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-60@cern.ch DESCRIPTION:Speakers: TOMAS\, Rogelio ()\nThe constraints in the LHC machi ne protection impose tighter optics tolerances than in any other hadron c ollider. A variety of beam-based measurements in the first days of LHC ope ration was effective to measure aperture clearance\, magnet polarities and machine optics. A summary of these measurements is given together with m odel insights.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=6 0&sessionId=6&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=60&sessionId=6& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Powering Interlocks DTSTART;VALUE=DATE-TIME:20090205T164000Z DTEND;VALUE=DATE-TIME:20090205T170000Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-61@cern.ch DESCRIPTION:Speakers: ZERLAUTH\, Markus ()\nThe powering interlock systems for sc and nc magnets have been fully validated during HWC 2008. The pres entation will summarise the changes and new functionalities that will be a pplied to the two interlock systems during the shut down and their impact on future re-commissioning. Improvements expected for the commissioning to ols will be summarised\, including time estimates and scheduling issues fo r HWC and beam commissioning 2009.\n\nhttp://indico.cern.ch/contributionDi splay.py?contribId=61&sessionId=7&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=61&sessionId=7& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Injection Tests DTSTART;VALUE=DATE-TIME:20090205T073000Z DTEND;VALUE=DATE-TIME:20090205T075000Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-62@cern.ch DESCRIPTION:Speakers: KAIN\, Verena ()\nThe success of the start-up of the LHC on 10th of September was in part due to the preparation without beam and injection tests in 2008. The injection tests allowed debugging and imp rovement in appropriate portions to allow safe\, efficient and state-of-th e-art commissioning later on. The usefulness of such an approach for a suc cessful start-up becomes obvious when looking at the problems we encounter ed before and during the injection tests and could solve during this perio d. The outline of the preparation and highlights of the different injectio n tests will be presented and the excellent performance of many tools disc ussed. A list of shortcomings will follow\, leading to some planning for the preparation of the run in 2009.\n\nhttp://indico.cern.ch/contributionD isplay.py?contribId=62&sessionId=6&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=62&sessionId=6& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Injection and beam dump DTSTART;VALUE=DATE-TIME:20090205T094000Z DTEND;VALUE=DATE-TIME:20090205T100000Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-63@cern.ch DESCRIPTION:Speakers: GODDARD\, Brennan ()\nThe initial commissioning of t he LHC injections and beam dumps allowed the basic functionality of the sy stems to be verified\, together with progress to be made on some of the sy stematic checks and measurements foreseen in the detailed commissioning pr ogramme. The observations and measurement results are summarised\, includi ng comparisons of element strengths and synchronisation\, details of the l ocal aperture measurements and some performance data for specific equipmen t sub-systems. The lessons learnt for the future LHC commissioning are emp hasised.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=63&sess ionId=6&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=63&sessionId=6& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Worst case beam incident causes and protection DTSTART;VALUE=DATE-TIME:20090204T180500Z DTEND;VALUE=DATE-TIME:20090204T183000Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-64@cern.ch DESCRIPTION:Speakers: GODDARD\, Brennan ()\nThe failure events which can o ccur with the fastest timescales in the LHC are mainly associated with the injection and extraction processes. The possible worst-case failure event s are catalogued and the protection layers in place to prevent the failure or mitigate the consequences are described. Particular attention is paid to the beam dump system kickers\, the energy tracking system\, the injecti on kickers and the aperture/tune kickers. The requirements for the positio ning of the dedicated absorbers with respect to the aperture will be recal led\, and the implications for the setting-up and operational stability cr itically examined.\n\nhttp://indico.cern.ch/contributionDisplay.py?contrib Id=64&sessionId=5&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=64&sessionId=5& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Beam induced damage - what is a safe beam? DTSTART;VALUE=DATE-TIME:20090204T173500Z DTEND;VALUE=DATE-TIME:20090204T175500Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-65@cern.ch DESCRIPTION:Speakers: KAIN\, Verena ()\nThe knowledge of damage levels is vital to define protection schemes\, beam loss monitor thresholds\, safe b eam limits for setting up the machines\, etc. This talk will try to revisi t our present knowledge and assumptions on damage levels in the LHC in ter ms of lost beam intensity\, beam momentum and emittance. It is clear that with the LHC’s unprecedented energy reach\, benchmark tests to cross-ch eck energy deposition simulations for all possible energies before LHC sta rt-up have not been possible. Also\, the definition of when equipment is damaged is not always straight forward. In view of the obvious limitations to our knowledge of damage levels\, operational commissioning and LHC run ning strategies will be re-discussed\, open questions will be highlighted and proposals will be presented where possible.\n\nhttp://indico.cern.ch/c ontributionDisplay.py?contribId=65&sessionId=5&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=65&sessionId=5& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Impact of SEUs DTSTART;VALUE=DATE-TIME:20090204T170500Z DTEND;VALUE=DATE-TIME:20090204T172500Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-66@cern.ch DESCRIPTION:Speakers: BRUGGER\, Markus ()\nRadiation levels expected in va rious LHC alcoves and more precisely the integrated flux of high-energy ha drons (multi-MeV range) pose a significant risk to any electronics not spe cifically designed or tested for such radiation levels. Different electron ics and their expected overall radiation sensitivity are discussed. Equipm ent is further grouped in terms of criticality for both\, machine safety a nd operation efficiency. The findings are put in relation with the radiati on levels based on Monte-Carlo calculations and expected in the LHC tunnel and alcoves. Equipment partly depends on other devices and installations (e.g.\, communication) thus weak links are identified and redundancy issue s are discussed. Areas are prioritized not only by expected radiation leve ls but also by carefully considering respective equipment details. Long-te rm development of radiation hard equipment is understood to be indispensib le and the importance to efficiently and effectively steer SEU related act ivities is underlined.\n\nhttp://indico.cern.ch/contributionDisplay.py?con tribId=66&sessionId=5&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=66&sessionId=5& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Transfer lines and Injection: results from machine studies during beam commissioning DTSTART;VALUE=DATE-TIME:20090205T084500Z DTEND;VALUE=DATE-TIME:20090205T090000Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-67@cern.ch DESCRIPTION:Speakers: MEDDAHI\, Malika ()\nBeam commissioning of the SPS t o LHC transfer lines performed during the summer 2008 is reported. The em phasis is put on the optical checks measured for the first time in the las t part of the lines and into the LHC. In particular\, extensive trajectory studies\, dispersion measurements and coupling analysis are discussed. Th ese studies were conducted in parallel with hardware checks and the outcom e is summarised.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId =67&sessionId=6&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=67&sessionId=6& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Consolidation after beam operation – constraints from radiation protection considerations DTSTART;VALUE=DATE-TIME:20090203T102000Z DTEND;VALUE=DATE-TIME:20090203T104000Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-68@cern.ch DESCRIPTION:Speakers: FORKEL-WIRTH\, Doris ()\nSince 10th September 2008 a major part of the LHC installation is classified as Supervised Radiation Area. As soon as LHC operation will be resumed in 2009\, beam losses will inevitably increase the activation of accelerator and detector components\ , the maintenance and repair teams of the accelerator and the detectors ri sk to be exposed to elevated radiation levels. To reduce dose to personnel consolidation and repair work should preferably be done during the presen t shut-down. The radiological impact of delayed consolidation and the cons equences for repair in case of future incidents will be presented.\n\nhttp ://indico.cern.ch/contributionDisplay.py?contribId=68&sessionId=2&confId=4 5433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=68&sessionId=2& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Ions in the LHC DTSTART;VALUE=DATE-TIME:20090206T083000Z DTEND;VALUE=DATE-TIME:20090206T085000Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-69@cern.ch DESCRIPTION:Speakers: JOWETT\, John ()\nThe LHC should make a “hot switc h” from colliding protons to colliding lead nuclei in order to maximize the physics yield in a limited running time. I shall describe how we pla n to achieve this and review the pre-conditions including the readiness of the RF system and beam instrumentation. The initial run should have the beam structure foreseen in the “Early beam” parameter list but the col lision optics and beam energy may be different\, depending on what has bee n achieved in proton operation. I shall show how the performance\, incl uding luminosity and lifetime\, depends on these variables and discuss pos sible operating energies.\n\nhttp://indico.cern.ch/contributionDisplay.py? contribId=69&sessionId=8&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=69&sessionId=8& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Vacuum system – how to get ready for beam ? DTSTART;VALUE=DATE-TIME:20090203T084500Z DTEND;VALUE=DATE-TIME:20090203T090500Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-99@cern.ch DESCRIPTION:Speakers: Dr. BAGLIN\, Vincent ()\nDuring the incident of sect or 3-4\, the two beam vacuum sectors of 2.8 km each and four insulation va cuum sectors i.e. 750 m were vented to atmospheric pressure. Besides the mechanical damages of the nested bellows and plug-in-modules due to the m ouvement of the cold masses under the helium pressure\, soot and debris of superinsulation were spread inside the beam and insulation vacua. The pre sentation will cover the extend of the damage from Q6R3 till Q6L4. The str ategy deployed to repair\, to clean and to qualify the damaged vacuum syst ems will be discussed. Scheduling and compatibilty with beam operation iss ues will be also adressed.\n\nhttp://indico.cern.ch/contributionDisplay.py ?contribId=99&sessionId=2&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=99&sessionId=2& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Safety systems (AL3) and systems relevant to Safety DTSTART;VALUE=DATE-TIME:20090202T173500Z DTEND;VALUE=DATE-TIME:20090202T175500Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-98@cern.ch DESCRIPTION:Speakers: HUTCHINS\, Steve ()\nThe AL3 systems are basic life protection and are especially important during the shutdown\; there should be no point in the LHC underground areas in which a person is not or cann ot be informed of the dangers around him when they exist and so take appro priate action. The implantation of the different detection and alarm syste ms will be reviewed and their performance and reliability examined. The ne ed for fire doors to control released Helium will also be considered\, whi ch may have consequences for the ventilation and access systems.\n\nhttp:/ /indico.cern.ch/contributionDisplay.py?contribId=98&sessionId=1&confId=454 33 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=98&sessionId=1& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:LHC Cryogenics: What did we learn from cool-down to first beams DTSTART;VALUE=DATE-TIME:20090202T112500Z DTEND;VALUE=DATE-TIME:20090202T114500Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-91@cern.ch DESCRIPTION:Speakers: Mr. CLAUDET\, Serge ()\nCool-down and refrigeration issues\, cryogen management\, Tuning LSS components\, stability achieved\, delays to recover failures\, preliminary availability for beams\, medium term consolidations envisaged.\n\nhttp://indico.cern.ch/contributionDispla y.py?contribId=91&sessionId=0&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=91&sessionId=0& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Operational experience with circulating beam DTSTART;VALUE=DATE-TIME:20090205T075500Z DTEND;VALUE=DATE-TIME:20090205T081500Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-90@cern.ch DESCRIPTION:Speakers: REDAELLI\, Stefano ()\nFollowing various injection t ests\, the full LHC beam commissioning started on September 10th. Within t hree days of beam operation\, we established stable and captured circulati ng beam 2 and achieved circulating beam 1 for many turns. This was made po ssible by a thorough preparations of all the required accelerator systems\ , beam instrumentation and control software\, which all achieved a remarka ble performance. First beam measurements of the linear machine optics were commissioned and showed that the machine optics is well under control. Th e operational experience with circulating beam\, the performance of the va rious systems and the first measurement results are reviewed. The commissi oning procedures for the various systems are presented and lessons learnt for the 2009 operation are discussed.\n\nhttp://indico.cern.ch/contributio nDisplay.py?contribId=90&sessionId=6&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=90&sessionId=6& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Bus bar joints stability and protection DTSTART;VALUE=DATE-TIME:20090203T170500Z DTEND;VALUE=DATE-TIME:20090203T173000Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-93@cern.ch DESCRIPTION:Speakers: VERWEIJ\, Arjan ()\nA defective bus connection betwe en two dipole magnets was the primary cause of the incident in sector 34 o n September 19th. I will show how this could have happened\, i.e. how a hi ghly resistive joint has caused a thermal runaway and burned (or opened) b efore the QPS threshold was reached. In the second part of the talk I will present the new detection limits for the QPS upgrade of the RB and RQ cir cuits\, required to avoid similar thermal runaways in the future.\n\nhttp: //indico.cern.ch/contributionDisplay.py?contribId=93&sessionId=3&confId=45 433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=93&sessionId=3& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Training the dipoles DTSTART;VALUE=DATE-TIME:20090202T090000Z DTEND;VALUE=DATE-TIME:20090202T092000Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-92@cern.ch DESCRIPTION:Speakers: VERWEIJ\, Arjan ()\nDuring the hardware commissionin g in 2008 more than 30 training quenches were performed in the main dipole circuits in sectors 45\, 56\, and 78. An overview of these quenches will be given\, and the quench levels will be compared to the training observed in SM-18. Quench propagation to adjacent dipoles will be discussed\, and an estimate will be given of the total number of training quenches require d to reach 6\, 6.5\, and 7 TeV in all 8 sectors.\n\nhttp://indico.cern.ch/ contributionDisplay.py?contribId=92&sessionId=0&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=92&sessionId=0& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Risk Analysis for the Different Consolidation Proposals DTSTART;VALUE=DATE-TIME:20090203T182000Z DTEND;VALUE=DATE-TIME:20090203T184500Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-95@cern.ch DESCRIPTION:Speakers: STRAIT\, Jim ()\nIn parallel with the repairs in sec tor 34\, improvements are planned to a number of systems\, to allow safe d etection of faults similar to the one which caused the incident of 19 Sept ember\, and to limit the damage should a similar incident nonetheless occu r. These include improved bus and quench detection systems\, improved pr essure relief for the insulating and beam vacuum systems\, and improved an choring of the SSS to the tunnel floor. Not all of the planned mitigation s\, however\, may be fully implemented before the restart of the LHC in 20 09. I will review the potential benefits of partial or complete implement ation of each of the planned improvements\, individually or together with others\, and conversely the potential risks (consequences) of delayed impl ementation. I will also review the risks that remain even after the planne d consolidation is complete. Considering all proposals and the different risks\, I will comment on what would be the best strategy for consolidatio n\, and on the strategy for operations under different consolidation scena rios.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=95&session Id=3&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=95&sessionId=3& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Maximum Credible Incidents DTSTART;VALUE=DATE-TIME:20090204T160000Z DTEND;VALUE=DATE-TIME:20090204T162500Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-94@cern.ch DESCRIPTION:Speakers: STRAIT\, Jim ()\nFollowing the incident in sector 34 \, considerable effort has been made to improve the systems for detecting similar faults and to improve the safety systems to limit the damage if a similar incident should occur. Nevertheless\, even after the consolidatio n and repairs are completed\, other faults may still occur in the supercon ducting magnet systems\, which could result in damage to the LHC. Such fa ults include both direct failures of a particular component or system\, or an incorrect response to a “normal” upset condition\, for example a q uench. I will review a range of faults which could be reasonably expected to occur in the superconducting magnet systems\, and which could result in substantial damage and down-time to the LHC. I will evaluate the probabi lity and the consequences of such faults\, and suggest what mitigations\, if any\, are possible to protect against each.\n\nhttp://indico.cern.ch/co ntributionDisplay.py?contribId=94&sessionId=5&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=94&sessionId=5& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Access & LACS/LASS DTSTART;VALUE=DATE-TIME:20090202T171000Z DTEND;VALUE=DATE-TIME:20090202T172500Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-97@cern.ch DESCRIPTION:Speakers: PONCE\, Laurette ()\nThe LHC access system has been progressively put in operation starting from Spring 2008 and has been used in different configurations during the LHC commissioning phases (powering tests\, beam operation and shut-down).\n Based on the experience gained d uring these phases\, several modifications have been requested for improvi ng personal safety as well as operational efficiency for the next run. The performances and issues of the LACS/LASS found during the first year of o peration will be presented. The status of the implementation for a more ef ficient operation in 2009 will then be reviewed. In preparation of the re- powering of part of the machine combined in parallel with accesses\, possi ble interlocking of the access system with other equipments (i.e power con verter\, PIC...) will be finally discussed.\n\nhttp://indico.cern.ch/contr ibutionDisplay.py?contribId=97&sessionId=1&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=97&sessionId=1& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:RF Preparation for Beam in 2009 DTSTART;VALUE=DATE-TIME:20090205T181000Z DTEND;VALUE=DATE-TIME:20090205T183000Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-96@cern.ch DESCRIPTION:Speakers: CIAPALA\, Edmond (CERN)\nModifications to the ACS ca vity tuning systems should be completed early in 2009. First tests on the power and low level RF systems will be done with waveguide shorts\, as the cavities will be warm and the RUX45 tunnel roof blocks will still be open to allow transport of quadrupoles into sector 3-4. Any co-activity with magnet transport will need to be avoided till the installation of sector 3 -4 is completed. Well before beam\, the cavities will need to be cooled do wn and tuning and calibration checked. A period of cavity conditioning wil l certainly also be required. After cavity conditioning there will be a fi nal check on the cavity tuning and RF feedback systems. These activities a ll require availability of 4.5 K cryogenics\, in sectors 3-4 and 4-5. The beam control systems in UX45 will also be checked as far as possible befor e beam\, together with remote controls and signal monitoring systems. A de scription of this work\, the times needed for the various activities and a planning will be presented. Work on the ADT systems will be carried out i n parallel.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=96&s essionId=7&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=96&sessionId=7& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Possible scenarios for a safety upgrade of the ventilation system DTSTART;VALUE=DATE-TIME:20090202T180500Z DTEND;VALUE=DATE-TIME:20090202T182000Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-12@cern.ch DESCRIPTION:Speakers: INIGO-GOLFIN\, Joaquin ()\nThis paper/presentation d escribes the existing LHC ventilation (HVAC) system\, the design principle followed for the LEP Project and the modifications implemented for the LH C Project. A discussion on possible referential standards to compare the e xisting system with is presented and possible axes for its improvement\, b ased on these referentials\, are discussed. Finally\, some recommendations are given based on the system's present capabilities and the estimated in vestment necessary to achieve compliance to the referentials chosen.\n\nht tp://indico.cern.ch/contributionDisplay.py?contribId=12&sessionId=1&confId =45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=12&sessionId=1& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Critical spares DTSTART;VALUE=DATE-TIME:20090204T101000Z DTEND;VALUE=DATE-TIME:20090204T104000Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-18@cern.ch DESCRIPTION:Speakers: SABAN\, Roberto ()\nFollowing the completion of the installation last year\, several reviews (ATC\, LTC\, MARIC) were carried- out to draw up the inventory of the spare LHC components. A detailed summa ry of these exercises will be given and the present situation with the spa res following the September 19th incident will be presented.\n\nhttp://ind ico.cern.ch/contributionDisplay.py?contribId=18&sessionId=4&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=18&sessionId=4& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Magnets repair for 3-4 sectors DTSTART;VALUE=DATE-TIME:20090203T073000Z DTEND;VALUE=DATE-TIME:20090203T080000Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-46@cern.ch DESCRIPTION:Speakers: ROSSI\, Lucio ()\nThe incident in 3-4 sector has aff ected some 50 main LHC magnets. Such a scenario was never considered as re alistic in the past. Our reserve of magnet has been barely sufficient (som e 40 dipoles and 14 SSS\, in some cases the reserve magnet types are not c ompatible with the one damaged).\nFurthermore the subsequent measurements on other sectors have shown the necessity to replace other magnets. \nThe plan and methods for assessing the damage that occurred to a cold mass and the decision on its substitution\, rather than a simple revamping of the magnet itself\, will be discussed. The question if the magnets in the sect or are adequate for powering and beam operation will be addressed. The imp lementation of the changes and their traceability will be presented. Final ly the spare situation\, which includes the plan for repairing and testing of all damaged cold masses of sector 3-4 and the impact on it of the 3-4 incident\, is discussed.\n\nhttp://indico.cern.ch/contributionDisplay.py?c ontribId=46&sessionId=2&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=46&sessionId=2& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Reinstallation and interconnections DTSTART;VALUE=DATE-TIME:20090203T081000Z DTEND;VALUE=DATE-TIME:20090203T083500Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-47@cern.ch DESCRIPTION:Speakers: BERTINELLI\, Francesco ()\nReinstallation of the fir st magnets in the D-zone has already started in parallel with the removal of damaged magnets. It is planned for the last magnets to be reinstalled b y end March.\nThe start of interconnection (IC) work requires a minimum ch ain of adjacent magnets and their alignment: it is planned to start this i n late February. IC work will now be performed by CERN and FSU staff\, no longer with the Main Contractor as for past series work. The status of the IC situation\, the new work organization and responsibilities will be pre sented. Quality Control issues are particularly important\, both in order to reproduce past quality in the new conditions\, and of course to improve on critical aspects.\nIC work will also continue in parallel outside the D-zone in 34 and in other sectors during the shutdown. The issues of resou rces and scheduling are addressed.\n\nhttp://indico.cern.ch/contributionDi splay.py?contribId=47&sessionId=2&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=47&sessionId=2& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Readiness of and plans for the injectors for 2009 DTSTART;VALUE=DATE-TIME:20090206T093000Z DTEND;VALUE=DATE-TIME:20090206T095000Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-43@cern.ch DESCRIPTION:Speakers: METRAL\, Elias ()\nA large diversity of beams have b een prepared in the LHC injectors in the past few years\, such as single-b unch and multi-bunch beams\, with 25 ns and 75 ns bunch spacings. In 2008 the efforts were mainly devoted to the revival of the multi-bunch beam wit h 50 ns bunch spacing\, and the production of the different beams with int ermediate intensities per bunch. The purpose of the present paper is twofo ld: firstly\, review the status of the proton beams in all their forms\, w hich could be delivered by the injectors in 2009 on request from the LHC\; secondly\, summarize the situation with the ions and in particular the SP S commissioning with the early ion beam\, which took place at the end of t he 2007 run.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=43& sessionId=8&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=43&sessionId=8& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Superconducting electrical circuits DTSTART;VALUE=DATE-TIME:20090202T105000Z DTEND;VALUE=DATE-TIME:20090202T111000Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-77@cern.ch DESCRIPTION:Speakers: MESS\, Karl Hubert ()\nDuring the almost 18 months o f hardware commissioning nearly all superconducting circuits of the LHC we re tested with success and many of them are/were ready for operation. Howe ver a number of unexpected observations were made\, which either may limi t the performance of the accelerator\, have an impact on the operation\, r equire additional hardware and software\, or were simply a challenging puz zle without further impact.\n\nhttp://indico.cern.ch/contributionDisplay.p y?contribId=77&sessionId=0&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=77&sessionId=0& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Consequences of warm-up of a sector above 80K DTSTART;VALUE=DATE-TIME:20090204T094000Z DTEND;VALUE=DATE-TIME:20090204T100000Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-76@cern.ch DESCRIPTION:Speakers: STRUBIN\, Pierre ()\nThere may be circumstances when a sector has to be partially or totally warmed-up to temperatures above 8 0 K\, that is when thermal dilatation starts to play a role. Some equipme nt have been identify as presenting a risk\, like the non-conform "plug-in " modules in the arcs. Because of motion induced by thermal dilatation\, the electrical (ElQA) quality control may also have to be done again after cool-down.\nThe main reason identified so far for partial warm-up is the required maintenance of the cooling towers and the cryogenics plants. The re is also the request from the vacuum group to periodically warm-up the b eam screen to temperatures in the 100 K region to release and pump-out the gas crysorbed on the surface of the beam screen.\nObserved and expected t emperature conditions and statistics on failures of PIMs in sectors which have been warmed-up will be presented in this contribution. Methods to de tect buckled PIMs will be described\, as well as a recommended strategy fo r consolidation. Finally\, the required electrical quality controls will also be described.\n\nhttp://indico.cern.ch/contributionDisplay.py?contrib Id=76&sessionId=4&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=76&sessionId=4& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Risks due to UPS malfunctioning DTSTART;VALUE=DATE-TIME:20090204T163500Z DTEND;VALUE=DATE-TIME:20090204T165500Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-75@cern.ch DESCRIPTION:Speakers: HUGUES\, Thiesen ()\nTo ensure the safety of the LHC in case of partial or general electrical power failure\, all components o f the machine protection system are powered by an Uninterruptable Power Su pply (UPS). However\, just as for other systems of the machine\, the UPS i tself is not immune to malfunction. This presentation will evaluate the im pact of a UPS malfunction on the operation of the machine protection syste m and the consequences for the protection of the machine.\n\nhttp://indico .cern.ch/contributionDisplay.py?contribId=75&sessionId=5&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=75&sessionId=5& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:First Field Test of FiDeL\, the Magnetic Field Description for the LHC DTSTART;VALUE=DATE-TIME:20090205T105000Z DTEND;VALUE=DATE-TIME:20090205T110500Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-74@cern.ch DESCRIPTION:Speakers: BOTTURA\, Luca ()\nThe start-up of the LHC has provi ded the first field test for the concept\, functionality and accuracy of F iDeL\, the Field Description for the LHC. FiDeL is primarily a parametric model of the transfer function of the main field integrals generated by th e series of magnets in the LHC powering circuits\, from main optical eleme nts to high-order harmonic correctors\, both superconducting and normal-co nducting magnets. In addition\, the same framework is used to predict harm onic errors of both static and dynamic nature\, and forecast appropriate c orrections. In this paper we give a description of the level of detail ach ieved in the model and the rationale adopted for the LHC start-up. Beam-ba sed measurements have been used for an assessment of the first-shot accura cy in the prediction of the current setting for the main arc magnets. We f inally give a list of priority issues to be addressed\, and sketch a plan for the preparation of the LHC restart.\n\nhttp://indico.cern.ch/contribut ionDisplay.py?contribId=74&sessionId=6&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=74&sessionId=6& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:First Results from the LHC Beam Instrumentation Systems DTSTART;VALUE=DATE-TIME:20090205T100500Z DTEND;VALUE=DATE-TIME:20090205T102500Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-73@cern.ch DESCRIPTION:Speakers: JONES\, Rhodri ()\nDuring the 2008 LHC injection syn chronisation tests and the subsequent days with circualting beam\, the maj ority of the LHC beam instrumentation systems were capable of measuring th eir first beam parameters. This included the two large\, distributed\, bea m position and beam loss systems\, as well as the scitillating and OTR scr een systems\, the fast and DC beam current transformer systems\, the tune measurement system and the wire scanner system. The fast timing system was also extensively used to synchronise most of this instrumentation.\nThis presentation will comment on the results to date\, some of the problems ob served and the improvements to be implemented before the next LHC run.\n\n http://indico.cern.ch/contributionDisplay.py?contribId=73&sessionId=6&conf Id=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=73&sessionId=6& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Options and preferences for proton running DTSTART;VALUE=DATE-TIME:20090206T080000Z DTEND;VALUE=DATE-TIME:20090206T082000Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-72@cern.ch DESCRIPTION:Speakers: HERR\, Werner ()\nThe choice of parameters for proto n operation in the LHC in 2009 is subject to constraints from beam dynamic s as well as the experiments desiderata. These constraints are reviewed an d the preferred operational scenarios are presented together with possible strategies to increase the performance.\n\nhttp://indico.cern.ch/contribu tionDisplay.py?contribId=72&sessionId=8&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=72&sessionId=8& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Magnet Circuits DTSTART;VALUE=DATE-TIME:20090205T160000Z DTEND;VALUE=DATE-TIME:20090205T163000Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-71@cern.ch DESCRIPTION:Speakers: VERGARA FERNANDEZ\, Antonio ()\nThe LHC has 1572 sup erconducting circuits. Most of the time and resources during the Hardware Commissioning were consumed by tests of each circuit of the collider\, the so-called powering tests. The tests consisted in carrying out several pow ering cycles at different current levels for each superconducting circuit. The number of tests needed for each sector was around 1500\, thus more th an 12000 for the whole machine. The aim for the 2009 campaign is to minimi se the total time needed for re-commissioning these circuits before beam o peration at 5 TeV. This will be done by reducing the number of steps neede d for those circuits which have been already commissioned in a similar way as it was done for the second commissioning campaign in sector 4-5 and by optimising the test planning and execution applying the huge experience g athered in the last two years of powering tests. The special powering plan designed for sector 3-4 and the commissioning of the new systems such as the QPS upgrade are also presented.\n\nhttp://indico.cern.ch/contributionD isplay.py?contribId=71&sessionId=7&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=71&sessionId=7& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:QPS Upgrade and Re-commissioning DTSTART;VALUE=DATE-TIME:20090203T174000Z DTEND;VALUE=DATE-TIME:20090203T180000Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-70@cern.ch DESCRIPTION:Speakers: DENZ\, Reiner ()\nPrior to the re-start of the Large Hadron Collider LHC in 2009 the protection system for superconducting dev ices QPS will be submitted to a substantial upgrade. The foreseen modifica tions will enhance the capability of the system in detecting problems rela ted to the electrical interconnections between superconducting magnets as well as the detection of so-called aperture symmetric quenches in the LHC main magnets.\nThe presentation will describe the design and implementatio n of the new protection layers and report on recent tests with prototype d evices. It will address as well the planned steps for commissioning of the new system\, possible limitations and the additional tools and procedures required to make use of its full capability. Finally the recent progress with respect to procurement\, production\, test and installation will be p resented.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=70&ses sionId=3&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=70&sessionId=3& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Organization DTSTART;VALUE=DATE-TIME:20090206T103000Z DTEND;VALUE=DATE-TIME:20090206T105000Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-79@cern.ch DESCRIPTION:Speakers: ARDUINI\, Gianluigi ()\nThe organization and the str ucture put in place for the machine check-out and for the beam commissioni ng have been instrumental for the rapid progress of the commissioning of t he LHC Machine before the Sector 34 incident. After a review of the 2008 e xperience\, the organization for the 2009 will be sketched with the expect ed commissioning steps and the roles of the different actors. The issue of the organization during unplanned machine stops and their possible use fo r superconducting magnet training and interlock testing for operation at h igher energy/intensity will be briefly discussed.\n\nhttp://indico.cern.ch /contributionDisplay.py?contribId=79&sessionId=8&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=79&sessionId=8& confId=45433 END:VEVENT BEGIN:VEVENT SUMMARY:Are we ready for the 2009 beam operation? DTSTART;VALUE=DATE-TIME:20090206T100000Z DTEND;VALUE=DATE-TIME:20090206T102000Z DTSTAMP;VALUE=DATE-TIME:20130618T051016Z UID:indico-contribution-45433-78@cern.ch DESCRIPTION:Speakers: REDAELLI\, Stefano ()\nIn preparation for the 2008 L HC beam operation\, commissioning procedures were established by the commi ssioning team to safely bring up the LHC performance from the initial beam tests to the first 7 TeV physics runs with reduced intensity and intermed iate beta* values. The status of the procedures and their usage during the 2008 beam experience is reviewed. The improvements needed for\nthe 2009 o peration\, in particular as far as the squeeze\, luminosity performance\, backgrounds and operating at reduced beam energies are concerned\, are dis cussed. Requirements for ion operation are also presented.\n\nhttp://indic o.cern.ch/contributionDisplay.py?contribId=78&sessionId=8&confId=45433 LOCATION:Chamonix Le Majestic URL:http://indico.cern.ch/contributionDisplay.py?contribId=78&sessionId=8& confId=45433 END:VEVENT END:VCALENDAR