BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Can the proton injectors meet the HL-LHC requirements after LS2? DTSTART;VALUE=DATE-TIME:20120209T170000Z DTEND;VALUE=DATE-TIME:20120209T172000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-56@cern.ch DESCRIPTION:Speakers: GODDARD\, Brennan (CERN)\nThe LIU project has as man date the upgrade of the LHC injector chain to match the requirements of HL -LHC. The present planning assumes that the upgrade work will be completed in LS2\, for commissioning in the following operational year. The known l imitations in the different injectors are described\, together with the va rious upgrades planned to improve the performance. The expected performanc e reach after the upgrade with 25 and 50 ns beams is examined. The project planning is discussed in view of the present LS1 and LS2 planning. The ma in unresolved questions and associated decision points are presented\, and the key issues to be addressed by the end of 2012 are detailed in the con text of the machine development programs and hardware construction activit ies.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=56&sessionI d=7&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=56&sessionId=7& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Will ALICE be running during the HL-LHC era? DTSTART;VALUE=DATE-TIME:20120209T160000Z DTEND;VALUE=DATE-TIME:20120209T161000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-50@cern.ch DESCRIPTION:Speakers: WESSELS\, Johannes (Westfaelische Wilhelms-Universit aet Muenster (DE))\nWe will present the perspectives for ion running in th e HL-LHC era. \nIn particular\, ALICE is preparing a significant upgrade o f its rate capabilities and further extending its particle identification potential. This paves the way for heavy ion physics at unprecedented lumin osities\, which are expected in the HL-LHC era with the heaviest ions. The potential interest of data-taking during high luminosity proton runs for ATLAS and CMS will also be commented.\n\nhttp://indico.cern.ch/contributio nDisplay.py?contribId=50&sessionId=7&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=50&sessionId=7& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Plans for ions in the injector complex DTSTART;VALUE=DATE-TIME:20120209T183000Z DTEND;VALUE=DATE-TIME:20120209T185000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-60@cern.ch DESCRIPTION:Speakers: MANGLUNKI\, Django (CERN)\nThe heavy ion beams requi red during the HL-LHC era will imply significant modifications to the exis ting injector chain. We review the various options\, highlighting the impo rtance of an early definition of the future needs and keeping in mind the compatibility with the rest of the future CERN physics programme.\n\nhttp: //indico.cern.ch/contributionDisplay.py?contribId=60&sessionId=7&confId=16 4089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=60&sessionId=7& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Beam current limit for HL-LHC DTSTART;VALUE=DATE-TIME:20120210T073000Z DTEND;VALUE=DATE-TIME:20120210T075000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-61@cern.ch DESCRIPTION:Speakers: ASSMANN\, Ralph Wolfgang (CERN)\nThe HL-LHC upgrades require beam currents\, that are significantly increased beyond the origi nal specifications of the LHC. The talk will explore expected limitations in hardware systems (including RF power\, instrumentation\, vacuum)\, th e impact of increased beam losses on quench statistics\, risks due to bea m current related damage\, beam dynamics issues\, loss-induced activation and single event upsets\n\nhttp://indico.cern.ch/contributionDisplay.py?co ntribId=61&sessionId=9&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=61&sessionId=9& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Do we really need an upgrade of the collimation system for HL-LHC? DTSTART;VALUE=DATE-TIME:20120210T075500Z DTEND;VALUE=DATE-TIME:20120210T081500Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-62@cern.ch DESCRIPTION:Speakers: REDAELLI\, Stefano (CERN)\nSeveral improvements are foreseen for the collimation system during the LS1. The talk will disc uss how the new performance level compares with the HL-LHC needs and if further improvements will be needed to be compatible with the high luminos ity operations expected for the HL-LHC upgrade .\n\nhttp://indico.cern.ch /contributionDisplay.py?contribId=62&sessionId=9&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=62&sessionId=9& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:New Magnets for the IR: how far are we from HL-LHC target? DTSTART;VALUE=DATE-TIME:20120210T082000Z DTEND;VALUE=DATE-TIME:20120210T084000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-63@cern.ch DESCRIPTION:Speakers: SABBI\, Gianluca (LBNL)\nThe HL-LHC will benefit fro m new magnet technology (large aperture\, Nb3Sn conductors) already under advanced R&D programs. The talk will review the status and roadmap of the new magnets for the high luminosity interaction regions.\n\nhttp://indico. cern.ch/contributionDisplay.py?contribId=63&sessionId=9&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=63&sessionId=9& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Crab Cavities: from virtual reality to real reality? DTSTART;VALUE=DATE-TIME:20120210T084500Z DTEND;VALUE=DATE-TIME:20120210T090500Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-64@cern.ch DESCRIPTION:Speakers: CALAGA\, Rama (CERN)\nThe talk will review the statu s and roadmap for the crab-cavity system that is foreseen for the HL-LHC u pgrade project for luminosity enhancement and leveling.\n\nhttp://indico.c ern.ch/contributionDisplay.py?contribId=64&sessionId=9&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=64&sessionId=9& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:LHeC and HE-LHC: Accelerator lay-out and challenges DTSTART;VALUE=DATE-TIME:20120210T094000Z DTEND;VALUE=DATE-TIME:20120210T100000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-65@cern.ch DESCRIPTION:Speakers: ZIMMERMANN\, Frank (CERN)\nThis talk will present a concise description of the layout of the two machines\, together with the main accelerator-physics and technology challenges\, detail the required L HC modifications\, and describe the global schedules with decision points. \n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=65&sessionId=9& confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=65&sessionId=9& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Magnet R&D for LHeC and HE-LHC: synergy and competion? DTSTART;VALUE=DATE-TIME:20120210T100500Z DTEND;VALUE=DATE-TIME:20120210T102500Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-66@cern.ch DESCRIPTION:Speakers: BOTTURA\, Luca (CERN)\nThe new projects heavily rely on new magnet systems. The talk with illustrate the magnet R&D program fo r the LHeC (accelerator\, transfer lines\, kickers\, interaction regions) and the HE-LHC (main Ring\, SPS+\, transfer lines\, kickers). In particula r synergies or parallel roadmaps will be highlighted together with the fir st steps foreseen for 2012.\n\nhttp://indico.cern.ch/contributionDisplay.p y?contribId=66&sessionId=9&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=66&sessionId=9& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:SC Cavities R&D for LHeC an HE-LHC DTSTART;VALUE=DATE-TIME:20120210T103000Z DTEND;VALUE=DATE-TIME:20120210T105000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-67@cern.ch DESCRIPTION:Speakers: JENSEN\, Erk (CERN)\nThe new machines HE-LHC and Lhe C (whether or not linac-ring and ring-ring options will be favored) rely o n new RF systems. The talk will analyze the synergies or competitions betw een the R&D strategies. The first steps foreseen for 2012 will be highligh ted.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=67&sessionI d=9&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=67&sessionId=9& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Chamonix 2012 welcome DTSTART;VALUE=DATE-TIME:20120206T073000Z DTEND;VALUE=DATE-TIME:20120206T073500Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-68@cern.ch DESCRIPTION:Speakers: MYERS\, Steve ()\nhttp://indico.cern.ch/contribution Display.py?contribId=68&sessionId=0&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=68&sessionId=0& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Special Seminar - Mikhail Lomonosov DTSTART;VALUE=DATE-TIME:20120209T150000Z DTEND;VALUE=DATE-TIME:20120209T160000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-69@cern.ch DESCRIPTION:Speakers: SHILTSEV\, Vladimir (Fermilab)\nhttp://indico.cern.c h/contributionDisplay.py?contribId=69&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=69&confId=16408 9 END:VEVENT BEGIN:VEVENT SUMMARY:HL-LHC operation with protons and ions DTSTART;VALUE=DATE-TIME:20120209T163000Z DTEND;VALUE=DATE-TIME:20120209T165000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-52@cern.ch DESCRIPTION:Speakers: BRUNING\, Oliver (CERN)\nThe presentation discusses potential variations of the beam and optics parameters that are compatible with the HL-LHC design goals and attempts to discuss the parameter margin s required for translating the HL-LHC performance parameters to specificat ions for the LHC injector complex. The variations of the parameter sets at tempt to incorporate the experience from the LHC operation and MD studies in 2010 and 2011. Particular attention will be given to a comparison of th e 25ns and 50ns bunch spacing scenarios for the proton beam operation. Pre liminary information will be given about the modes of operation and beam p arameters for ions. The impact of operation for ions during the HL-LHC exp loitation period will be outlined.\n\nhttp://indico.cern.ch/contributionDi splay.py?contribId=52&sessionId=7&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=52&sessionId=7& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:UFOs – will they take over? DTSTART;VALUE=DATE-TIME:20120209T100500Z DTEND;VALUE=DATE-TIME:20120209T102500Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-53@cern.ch DESCRIPTION:Speakers: BAER\, Tobias (CERN/Hamburg University (DE))\nDuring UFOs are one of the major unexpected performance limitations of the LHC. With large-scale increases of the BLM thresholds\, their impact on LHC ava ilability could be mitigated in the second half of 2011. For higher beam e nergy and lower magnet quench limits\, the problem is expected to be consi derably worse\, though. Therefore\, in 2011\, the diagnostics for UFO even ts were significantly improved\, dedicated experiments and measurements in the LHC and in the laboratory were made and complemented by FLUKA simulat ions and theoretical studies. In this talk\, the state of knowledge is sum marized and extrapolations for LHC operation after LS1 are presented. Miti gation strategies are proposed and related tests and measures for 2012 are specified.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=53&s essionId=6&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=53&sessionId=6& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:R2E failure rates expectations DTSTART;VALUE=DATE-TIME:20120207T103000Z DTEND;VALUE=DATE-TIME:20120207T105000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-24@cern.ch DESCRIPTION:Speakers: BRUGGER\, Markus (CERN)\n2011 very successful LHC op eration has provided valuable input for the detailed analysis of radiation levels and radiation induced equipment failures. Radiation levels around LHC critical areas and the LHC tunnel were studied in detail and compared to available simulation results\, as well as put in perspective to LHC ope ration parameters. Observed radiation induced failures were not only analy zed in detail\, but already addressed through early relocation measures an d patch-solution on the equipment level. Both improvements continue during this xMasBreak together with the installation of heavy shielding around t he RBs and UJs in Point-1. Based on measured radiation levels\, calculatio ns for the shielding improvements and expected operational parameters this talk provides an update on the expected radiation levels around LHC criti cal areas. Briefly summarizing the already performed mitigation measures a nd equipment patches\, an estimate is provided on expected equipment failu re rates during 2012 operation. Required beam and measurement studies are highlighted in order to further improve the predictions of both radiation levels and expected equipment failures\, the latter driving the chosen mit igation actions for LS1.\n\nhttp://indico.cern.ch/contributionDisplay.py?c ontribId=24&sessionId=2&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=24&sessionId=2& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Vacuum upgrade DTSTART;VALUE=DATE-TIME:20120208T102000Z DTEND;VALUE=DATE-TIME:20120208T104000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-25@cern.ch DESCRIPTION:Speakers: JIMENEZ\, Jose Miguel (CERN)\nThe last two years of LHC operation have highlighted concerns on the levels of the dynamic vacuu m in the long straight sections (LSS) in presence of high intensity beams. The analysis of the existing data has shown relationship between pressure s spikes and beam screen temperature oscillations or micro-sparking in the RF fingers of the bellows on one side and coincidence of pressure bumps w ith stimulated desorption by electron cloud\, beam losses and/or thermal o ut gassing stimulated by HOM losses. \nThe electron cloud mitigation solut ions will be adapted to the different configurations: cold/warm transition s\, non-coated surfaces in direct view of beams\, photoelectrons\, etc. Al l scenarios will be presented together with their efficiencies. Additional pumping and reengineering of components will reduce the sensitivity of th e vacuum system to beam losses or HOM inducing out gassing. The expected m argin at nominal intensity and energy resulting from these consolidations will be summarized. \nFinally\, the challenges of the Experimental areas w ill be addressed\, more specifically the status of the new Beryllium pipes (ATLAS and CMS) which are in the critical path and the consolidation of v acuum instrumentation\, pumping and electron cloud mitigation. The risk co rresponding to the proposed consolidations will be shown and the margins w ith respect to the schedule analyzed.\n\nhttp://indico.cern.ch/contributio nDisplay.py?contribId=25&sessionId=3&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=25&sessionId=3& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:R2E strategy and activities during LS1 DTSTART;VALUE=DATE-TIME:20120208T095000Z DTEND;VALUE=DATE-TIME:20120208T101000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-21@cern.ch DESCRIPTION:Speakers: PERROT\, Anne-Laure (CERN)\nThe level of flux of had rons with energy in the multi MeV range expected from the collimation syst em at Point 7 and from the collisions at the interaction Points 1\, 5 and 8 will induce Single Event Errors (SEE) of the standard electronics presen t in equipment located around these Points. Such events would perturb the LHC operation. As a consequence\, the sensitive equipment will be shielded or relocated in safer areas.\nThese mitigations activities will be perfor med mainly during the LS1. About 15 groups (including equipment owners) wi ll be involved. Some of them will have to work in parallel in several Poin ts. This talk summarizes the planning of these mitigations activities in e ach impacted points. It presents the R2E organization process\, the priori ties and possible bottlenecks as today identified.\n\nhttp://indico.cern.c h/contributionDisplay.py?contribId=21&sessionId=3&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=21&sessionId=3& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Running the RF at higher beam energy and intensity DTSTART;VALUE=DATE-TIME:20120207T093000Z DTEND;VALUE=DATE-TIME:20120207T095000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-22@cern.ch DESCRIPTION:Speakers: BAUDRENGHIEN\, Philippe (CERN)\nThe improvements don e to the RF parameters and hardware in 2011 are reviewed. We then present the upgrades planned for 2012: Further reduction of capture losses with th e longitudinal damper\, batch per batch blow-up at injection and modificat ion of the blow-up to preserve bunch profile. Operation at higher energy i s readily possible with the present RF power\, and does not degrade longit udinal stability thanks to the controlled longitudinal emittance growth du ring the ramp. For operation with higher beam current\, the observations i n 2011 indicate that there is no single bunch issue with up to 3E11 p per bunch. With the large gain of the RF feedback and One-Turn feedback\, the cavity impedance at the fundamental will not be a limitation for ultimate intensity (1.7E11 p per bunch) with 25 ns spacing. The klystron power (30 0 kW RF at saturation) is sufficient for 25 ns operation with nominal inte nsity (2808 bunches per beam\, 1.1E11 p per bunch). An RF roadmap for goi ng beyond will be outlined: It calls for an upgrade of the LLRF only and s hould allow for operation with ultimate beam intensity (25 ns spacing\, 28 08 b\, 1.7E11 p per bunch) after LS1.\n\nhttp://indico.cern.ch/contributio nDisplay.py?contribId=22&sessionId=2&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=22&sessionId=2& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Transverse damper DTSTART;VALUE=DATE-TIME:20120207T100000Z DTEND;VALUE=DATE-TIME:20120207T102000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-23@cern.ch DESCRIPTION:Speakers: HOFLE\, Wolfgang (CERN)\nPlans for the operation of the transverse damper in 2012 at bunch spacings of 50 ns and 25 ns and at increased collision energy will be reviewed. The increased energy and the experience that will be gained at 25 ns are very important to define any u pgrades that may be necessary for the high luminosity operation at 7 TeV a fter LS1. This means that the available parameter space must be probed in 2012 which in particular includes a higher feedback gain in the ramp and w ith colliding beams. Limits for the feedback gain for the current system w ill be outlined. The potential benefits of running with higher feedback ga in for a better emittance preservation will be stressed and weighed agains t the operational difficulties and the potential impact of noise in the da mper system. A plan for re-commissiong at 50 ns and 25 ns for operation at 4 TeV will be outlined.\n\nhttp://indico.cern.ch/contributionDisplay.py?c ontribId=23&sessionId=2&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=23&sessionId=2& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:RF upgrade program in LHC injectors and LHC machine DTSTART;VALUE=DATE-TIME:20120208T180000Z DTEND;VALUE=DATE-TIME:20120208T182000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-46@cern.ch DESCRIPTION:Speakers: JENSEN\, Erk (CERN)\nThe main themes of the presentl y on-going RF upgrade program are: the LLRF-upgrade for PSB and PS\, the s tudy of a tuning-free wide-band system for PSB\, the upgrade of the SPS 80 0 MHz amplifiers and beam controls and the upgrade of the transverse dampe rs of the LHC. Whilst LHC Splice Consolidation is certainly the top priori ty for LS1\, some necessary RF consolidation and upgrade is necessary to a ssure the LHC performance for the next 3-year run period. This includes 1) necessary maintenance and consolidation work that could not fit the short er technical stops during the last years\, 2) the upgrade of the SPS 200 M Hz system from presently 4 to 6 cavities\, which constitutes the present b ottle neck for LHC beam current and possibly 3) the replacement of one LHC cavity. On the longer term\, the LHC luminosity upgrade requires crab cav ities\, for which some preparatory work both in SPS Coldex and LHC point 4 must be scheduled during LS1.\n\nhttp://indico.cern.ch/contributionDispla y.py?contribId=46&sessionId=5&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=46&sessionId=5& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Will we still see SEEs? DTSTART;VALUE=DATE-TIME:20120209T094000Z DTEND;VALUE=DATE-TIME:20120209T100000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-47@cern.ch DESCRIPTION:Speakers: CALVIANI\, Marco (CERN)\nThe actions during the firs t years of the R2E Mitigation Project allowed to drastically reducing the rate of Single Event Errors on radiation sensitive electronic equipment in stalled in the LHC underground areas. Shielding and relocation activities during LS1 will allow the resolution of the present issues concerning UJs of P1\, 5 and 7 as well as the P8 cavern. The parallel development of radi ation tolerant power converters will address the remaining concerns in the RRs. Radiation levels in areas where luminosity is the source are under c ontrol. The remaining open questions are related to the evolution of the b eam-gas source term in the arc and in the dispersion suppressor and to the evolution of losses at the betatron and momentum insertion regions. 2012 operation will allow addressing these points\, which will be used for a co mplete forecast of radiation levels and projected failures after the resum e of operation in 2014/15.\n\nhttp://indico.cern.ch/contributionDisplay.py ?contribId=47&sessionId=6&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=47&sessionId=6& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Performance reach of LHC after LS1 DTSTART;VALUE=DATE-TIME:20120209T075500Z DTEND;VALUE=DATE-TIME:20120209T081500Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-44@cern.ch DESCRIPTION:Speakers: HERR\, Werner (CERN)\nBased on past experience (2010 /2011)\, in particular expected limitations from beam-beam effects\, and t aking into account the expected beam quality from the LHC injectors\, the peak and integrated luminosities at top energy are discussed for different scenarios (e.g. bunch spacing\, beta*). In particular it will be shown wh ich are the key parameters to reach the nominal luminosity and whether it is possible to exceed the nominal luminosity. Possible test in 2012 are di scussed.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=44&sess ionId=6&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=44&sessionId=6& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Beam systems without failures – what can be done? DTSTART;VALUE=DATE-TIME:20120209T084500Z DTEND;VALUE=DATE-TIME:20120209T090500Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-45@cern.ch DESCRIPTION:Speakers: SOLFAROLI CAMILLOCCI\, Matteo (CERN)\, UYTHOVEN\, Ja n (CERN)\nThe beam dumps triggered by interlocks not related to the magnet powering are discussed. This concerns the systems like the RF\, the tran sverse feedbacks\, beam instrumentation\, beam dumping system\, collimator s and control systems. An analysis of the reasons of these dumps is presen ted together with a possible strategy to mitigate the effect of these fail ures.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=45&session Id=6&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=45&sessionId=6& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Access strategy in the accelerator complex and experimental areas DTSTART;VALUE=DATE-TIME:20120208T173500Z DTEND;VALUE=DATE-TIME:20120208T175000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-42@cern.ch DESCRIPTION:Speakers: NUNES\, Rui (CERN)\nThis paper shall review the main features of the new PS Personnel Protection System (PSPSS) as well as the main milestones for its deployment during the Long Shutdown of 2013-2014. Access conditions in the PS\, SPS and LHC complexes during this period sh all be described as well as the upgrades and improvements that are under p reparation.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=42&s essionId=5&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=42&sessionId=5& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Cryogenics system: strategy to achieve nominal performance and rel iable operation DTSTART;VALUE=DATE-TIME:20120208T105000Z DTEND;VALUE=DATE-TIME:20120208T112000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-29@cern.ch DESCRIPTION:Speakers: TAVIAN\, Laurent (CERN)\nDuring the LHC operation in 2010 and 2011\, the cryogenic system has achieved an availability level f ulfilling the overall requirement. To reach this level\, the cryogenic sys tem has profited like many other beam-dependent systems from the reduced b eam parameters. Therefore\, impacts of some failures occurred during the L HC operation were mitigated by using the overcapacity margin\, the existin g built-in redundancy in between adjacent sector cryogenic plants and the “cannibalization” of spares on two idle cryogenic plants. These two fi rst years of operation were also crucial to identify the weaknesses of the present cryogenic maintenance plan and new issues like SEUs. After the LS 1\, nominal beam parameters are expected and the mitigated measures will b e less effective or not applicable at all. Consequently\, a consolidation plan to improve the MTBF and the MTTR of the LHC cryogenic system is under definition. Concerning shutdown periods\, the present cryogenic sectoriza tion imposes some restrictions in the type of interventions (e.g. cryo-mag net removal) which can be done without affecting the operating conditions of the adjacent sector. This creates additional constrains and possible ex tra down-time in the schedule of the shutdowns including the hardware comm issioning.\nThis presentation focuses on the consolidation plan foreseen d uring the LS1 to improve the performance of the LHC cryogenic system in te rms of availability and sectorization.\n\nhttp://indico.cern.ch/contributi onDisplay.py?contribId=29&sessionId=3&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=29&sessionId=3& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Ions in 2012 DTSTART;VALUE=DATE-TIME:20120207T183000Z DTEND;VALUE=DATE-TIME:20120207T185000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-40@cern.ch DESCRIPTION:Speakers: JOWETT\, John (CERN)\nReview of the options for the heavy ion run in 2012: proton-lead or lead-lead or time-sharing between t he two. The implications of running at special energies choice of bunch spacing and filling scheme. Performance expectations in the light of the first p-Pb test\, further MD on p-Pb and the 2011 Pb-Pb run. Possibilitie s for future improvements and an outline of the programme between LS1 and LS3.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=40&sessionI d=4&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=40&sessionId=4& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Performance potential of the injectors after LS1 DTSTART;VALUE=DATE-TIME:20120209T073000Z DTEND;VALUE=DATE-TIME:20120209T075000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-41@cern.ch DESCRIPTION:Speakers: DAMERAU\, Heiko (CERN)\nThe main upgrades of the inj ector chain in the framework of the LIU project will only be implemented i n the second long shutdown (LS2)\, in particular the increase of the PSB e nergy to 2 GeV or the implementation of cures/solutions against instabilit ies/e-cloud effects etc. On the other hand\, Linac4 will become available by the end of LS1. Its connection to the PSB can then take place either on short notice if Linac2 fails\, taking 50 MeV protons in the PSB via the e xisting injection system but with reduced performance\, or from the end of 2015 during a prolonged winter shutdown before LS2. The anticipated beam performance of the LHC injectors after LS1 in these different cases is pre sented. Space charge on the PS flat-bottom will remain a limitation becaus e the PSB to PS transfer energy will stay at 1.4 GeV. Therefore new RF man ipulations are presented which will improve brightness for 25 ns bunch spa cing and should allow for more than nominal luminosity in the LHC.\n\nhttp ://indico.cern.ch/contributionDisplay.py?contribId=41&sessionId=6&confId=1 64089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=41&sessionId=6& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Input from Evian DTSTART;VALUE=DATE-TIME:20120206T074500Z DTEND;VALUE=DATE-TIME:20120206T080500Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-1@cern.ch DESCRIPTION:Speakers: LAMONT\, Mike (CERN)\nThe LHC Beam Operation worksho p 2011 took place 12th - 14th December. The principle aims of the workshop were to review 2011 LHC beam commissioning and beam operations experience \, and to look forward to the operation of the LHC in 2012. Issues covered include: availability\; injection\; operational performance\; beam loss a nd machine protection\;system performance\; limitations\; and the outlook for 2012.\n\nA concise summary of the workshop is presented and potential performance issues for 2012 are highlighted. Where material is covered in more depth here at Chamonix appropriate reference will be made.\n\nhttp:// indico.cern.ch/contributionDisplay.py?contribId=1&sessionId=0&confId=16408 9 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=1&sessionId=0&c onfId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Review of 2011 LHC run from the experiments perspective DTSTART;VALUE=DATE-TIME:20120206T073500Z DTEND;VALUE=DATE-TIME:20120206T074500Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-0@cern.ch DESCRIPTION:Speakers: FERRO-LUZZI\, Massimiliano (CERN)\nThe 2011 LHC run is reviewed from the experiments perspective. The achievements directly re lated to physics production are summarized. This includes high luminosity p-p and Pb-Pb running\, special activities (such as intermediate energy p- p physics\, 90 m optics\, luminosity calibrations) and other experiments ( for example satellite-main bunch collisions in IP2\, 25 ns stable beams te sts\, etc.).\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=0&s essionId=0&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=0&sessionId=0&c onfId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Injection and lessons for 2012 DTSTART;VALUE=DATE-TIME:20120206T082500Z DTEND;VALUE=DATE-TIME:20120206T084500Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-3@cern.ch DESCRIPTION:Speakers: BRACCO\, Chiara (CERN)\nInjection of 144 bunches int o the LHC became fully operational during the 2011 run and a nominal injec tion of 288 bunches was accomplished during MD time. Several mitigation so lutions were put in place to minimise losses from the transfer line (TL) c ollimators and losses from kicking debunched beam during injection. Never theless\, shot-by-shot and bunch-by-bunch trajectory variations\, as well as long terms drifts\, were observed and required a regular resteering of the TL implying a non negligible amount of time spent for injection setup. Likely sources of instability have been identified (i.e. MKE and MSE rip ples) and possible cures to optimise 2012 operation are presented. Well d efined references for TL steering will be defined in a more rigorous way i n order to allow a more straightforward and faster injection setup. Benefi ts from an improved transverse beam diagnostic in the injectors (emittance \, beam distribution and tail population) are illustrated. \nEncountered and potential issues of the injection system\, in particular the injection kickers MKI\, are discussed also in view of injections with a higher numb er of bunches.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=3 &sessionId=0&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=3&sessionId=0&c onfId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:2011 availability analysis DTSTART;VALUE=DATE-TIME:20120206T080500Z DTEND;VALUE=DATE-TIME:20120206T082500Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-2@cern.ch DESCRIPTION:Speakers: MACPHERSON\, Alick (CERN)\nA critical evaluation of machine availability and performance analysis of the 2011 Run will be give n. This will include both an analysis of the run in terms of the differen t operational modes\, as well as a breakdown of the run in terms of downti me and faults. Detailed evaluation of systems with significant fault time will be addressed\, and intended improvements discussed. In addition a sur vey of premature dump statistics will be presented\, along with a summary of the implemented improvements and their effect on overall performance in the 2011 run.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=2 &sessionId=0&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=2&sessionId=0&c onfId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Vacuum performance and lessons for 2012 DTSTART;VALUE=DATE-TIME:20120206T092500Z DTEND;VALUE=DATE-TIME:20120206T094500Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-5@cern.ch DESCRIPTION:Speakers: BAGLIN\, Vincent (CERN)\nDuring the LHC run 2011\, a tremendous progress has been made towards the machine operation with desi gn parameters. In the same time\, the run confirmed the sensitivity of the beam vacuum system to the machine parameters. As expected\, a successful scrubbing period allowed mitigating the effects of the electron cloud givi ng room to an entire filling of the ring with 50 ns beams. In parallel iss ues such as the impact of the beam screen regulation\, pressures spikes an d local outgassing were observed during the year. On-line mitigations and immediate compensatory measures implemented during the winter technical st op are reviewed together with their efficiencies. The expected limitations while waiting for LS1 consolidation or when running with 25 ns beams are addressed. Lessons for 2012 are discussed.\n\nhttp://indico.cern.ch/contri butionDisplay.py?contribId=5&sessionId=0&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=5&sessionId=0&c onfId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Machine Protection DTSTART;VALUE=DATE-TIME:20120206T090500Z DTEND;VALUE=DATE-TIME:20120206T092500Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-4@cern.ch DESCRIPTION:Speakers: ZERLAUTH\, Markus (CERN)\nThe performance and experi ence with the LHC machine protection system during the 2011 run will be br iefly summarized. Emphasis will be given to identify further potential imp rovements of the existing protection systems for the 2012 run alongside po ssibilities to allow for a more efficient strategy during the intensity ra mp up whilst maintaining the required validation steps and dependability f or the various machine protection elements. The role of machine protection during the 2011 MD periods and special runs will be summarized.\n\nhttp:/ /indico.cern.ch/contributionDisplay.py?contribId=4&sessionId=0&confId=1640 89 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=4&sessionId=0&c onfId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:LHC experience with different bunch spacings in 2011 (25 \, 50 & 7 5 ns) DTSTART;VALUE=DATE-TIME:20120206T160000Z DTEND;VALUE=DATE-TIME:20120206T162000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-7@cern.ch DESCRIPTION:Speakers: RUMOLO\, Giovanni (CERN)\nLHC operation in 2011 had a smooth start in March with 75ns beams and only one month later moved to 50ns beam\, after a successful dedicated scrubbing run. Several observable s\, such as pressure rise\, heat load in the arcs\, beam instability\, emi ttance growth and synchronous phase shift\, clearly pointed to the presenc e of an electron cloud inside the machine during the first days of operati on with 50ns beams. The gradual reduction of all these effects\, and their eventual disappearance\, over the days of the scrubbing run\, indicated e lectron cloud mitigation and allowed physics production to shift to 50ns b eams. Up to the end of the run the quality of the 50ns beams was increased by regular stages (first lower transverse emittances\, then higher intens ities) and they could provide steadily improving peak luminosities. Furthe rmore\, 4 MD sessions with 25ns beams took place fin the period June-Octob er\, but the quality of these beams was always deteriorated by severe elec tron cloud effects. However\, a clear improvement was noticed also with th e 25ns runs. An estimation of the present state of conditioning of the mac hine and the required scrubbing time can be inferred from electron cloud s imulations compared with measured data.\n\nhttp://indico.cern.ch/contribut ionDisplay.py?contribId=7&sessionId=1&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=7&sessionId=1&c onfId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Emittance preservation DTSTART;VALUE=DATE-TIME:20120206T094500Z DTEND;VALUE=DATE-TIME:20120206T100500Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-6@cern.ch DESCRIPTION:Speakers: KAIN\, Verena (CERN)\nEmittance measurements during the LHC proton run 2011 indicated a blow-up of 20 % to 30 % from LHC injec tion to collisions. This presentation will show the emittance preservation throughout the different parts of the LHC cycle and discuss the current l imitations on emittance determination. An overview of emittance preservati on through the injector complex as function of bunch intensity will also b e given. Possible sources for the observed blow-up and required tests in 2 012 will be presented. Possible improvements of emittance diagnostics and analysis tools for 2012 will be shown.\n\nhttp://indico.cern.ch/contributi onDisplay.py?contribId=6&sessionId=0&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=6&sessionId=0&c onfId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Beam-induced heating/bunch length/RF and lessons for 2012 DTSTART;VALUE=DATE-TIME:20120206T170000Z DTEND;VALUE=DATE-TIME:20120206T172000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-9@cern.ch DESCRIPTION:Speakers: METRAL\, Elias (CERN)\nThe observations made in 2011 are first compared to expectations and the possible implications for the operation in 2012 are then discussed.\n\nhttp://indico.cern.ch/contributio nDisplay.py?contribId=9&sessionId=1&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=9&sessionId=1&c onfId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Observations of beam-beam effects in MDs in 2011 DTSTART;VALUE=DATE-TIME:20120206T163000Z DTEND;VALUE=DATE-TIME:20120206T165000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-8@cern.ch DESCRIPTION:Speakers: HERR\, Werner (CERN)\nWe report the observations of beam-beam effects made in MD sessions in 2011.\nThe results are compared w ith the expectations and possible implications for the operation in 2012 a re discussed.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=8& sessionId=1&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=8&sessionId=1&c onfId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Performance reach of the injector complex DTSTART;VALUE=DATE-TIME:20120207T083000Z DTEND;VALUE=DATE-TIME:20120207T085000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-18@cern.ch DESCRIPTION:Speakers: STEERENBERG\, Rende (CERN)\nAt the start of the 2011 physics run quite some margins in the performance of the injectors were a vailable and identified. Following the fast increase of the performance of the LHC itself during 2011\, these margins have very much been exploited and some have even been pushed further.\n\nIn view of further increase in the LHC luminosity\, the 2012 performance reach of the injectors will be r eviewed. One of the arising topics is satellite bunches from the injectors . Until now concerted effort went into supressing satellite bunches to a m inimum\, but a recent successful test with “controlled” satellites mig ht make their routine production and characterisation an important topic i n 2012.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=18&sessi onId=2&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=18&sessionId=2& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Experiments expectations\, plans and constraints DTSTART;VALUE=DATE-TIME:20120207T073000Z DTEND;VALUE=DATE-TIME:20120207T075000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-13@cern.ch DESCRIPTION:Speakers: GORINI\, Benedetto (CERN)\nThe talk discusses the in put from the experiments that is relevant to define next year's program.\n It covers the target for integrated luminosity for 2012\, for both p-p and Heavy Ion physics\, the configuration for the Heavy Ion period (p-Pb\, Pb -Pb or both) and the requests for special runs (high beta\, VdM scan with un-squeezed beam\, high or low pile-up runs…).\nThe impact of LHC parame ters and conditions on the experiments is also discussed\, including the e ffect of pile-up (would experiment performance be limited next year with 5 0 ns?)\, beam energy\, bunch length\, vacuum and background\, etc..\nPropo sals for optimizations will also be discussed\, including the use of satel lite-main collision to provide luminosity for ALICE and suggestions for re ducing the overhead of ALICE and LHCb polarity reversals.\n\nhttp://indico .cern.ch/contributionDisplay.py?contribId=13&sessionId=2&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=13&sessionId=2& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:EN-CV upgrade and consolidation DTSTART;VALUE=DATE-TIME:20120208T171000Z DTEND;VALUE=DATE-TIME:20120208T172500Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-38@cern.ch DESCRIPTION:Speakers: NONIS\, Mauro (CERN)\nThe EN/CV group will be heavil y involved into several projects and activities during LS1 within a windo w frame limited to around twelve months. According to the requests receive d so far\, the majority of projects are related to the upgrade of user’s equipment\, consolidation work and construction of new plants\; however a part of them is needed following the experience on the first years of LHC run or to adapt the installations to new operating parameters. The author shall focus his presentation on some of these projects\, outlining the im pact that they will have in operational working conditions or in the risk for breakdown.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId= 38&sessionId=5&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=38&sessionId=5& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Beam Energy DTSTART;VALUE=DATE-TIME:20120207T160000Z DTEND;VALUE=DATE-TIME:20120207T162000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-32@cern.ch DESCRIPTION:Speakers: SIEMKO\, Andrzej (CERN)\nThe limiting factors for op erating the LHC at higher energies with defective 13 kA busbar joints will be reviewed. The experience gained during the 2011 run\, including the qu ench statistics and dedicated quench propagation tests will be presented. The possible operational limits from the by-pass diode contact resistance issue will be addressed. Finally\, a proposal for running at the highest p ossible safe energy compatible with the pre-defined risk level will be pre sented.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=32&sessi onId=4&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=32&sessionId=4& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Turn-around improvements DTSTART;VALUE=DATE-TIME:20120207T080000Z DTEND;VALUE=DATE-TIME:20120207T082000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-14@cern.ch DESCRIPTION:Speakers: REDAELLI\, Stefano (CERN)\nAn efficient turnaround w ill be an important parameter for the integrated luminosity performance at LHC in 2012\, when an operation with steady beam parameters will be achie ved at the beginning early on in the run. Improvements of the operational cycle were already put successfully in place after the 2010 experience but additional improvements are possible. In this paper\, the 2011 turnaround performance is reviewed and the benefits of the improvements from 2010 ar e presented. Possible further gains are proposed for 2012.\n\nhttp://indic o.cern.ch/contributionDisplay.py?contribId=14&sessionId=2&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=14&sessionId=2& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Quench margins DTSTART;VALUE=DATE-TIME:20120206T180000Z DTEND;VALUE=DATE-TIME:20120206T182000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-11@cern.ch DESCRIPTION:Speakers: SAPINSKI\, Mariusz Gracjan (CERN)\nWith thirteen bea m induced quenches and numerous Machine Development tests the current know ledge of LHC magnets quench limits still contains a lot of unknowns. Vario us approaches to determine the quench limits are reviewed and results of t he tests are presented. Attempt to reconstruct a coherent picture emerging from these reults is taken. The available methods of computation of the q uench levels are presented together with dedicated particle shower simulat ions which are necessary to understand the tests. The future experiments\, needed to reach better understanding of quench limits as well as limits f or the machine operation are investigated. The possible strategies to set BLM thresholds are discussed.\n\nhttp://indico.cern.ch/contributionDisplay .py?contribId=11&sessionId=1&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=11&sessionId=1& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Lessons in beam diagnostics DTSTART;VALUE=DATE-TIME:20120206T173000Z DTEND;VALUE=DATE-TIME:20120206T175000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-10@cern.ch DESCRIPTION:Speakers: JONES\, Rhodri (CERN)\nThis presentation will concen trate on the studies carried out on LHC beam instrumentation systems durin g the 2011 run\, the improvements made and the outlook for 2012. It will i nclude an update on the issues resolved since 2010\, such as the performan ce of the BCT systems\, and discuss advances in the bunch by bunch measure ment capability of many systems. The conclusions will highlight what can b e hoped for in terms of performance for 2012 and the issues which remain t o be solved.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=10& sessionId=1&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=10&sessionId=1& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:MD plans in 2012 DTSTART;VALUE=DATE-TIME:20120207T180000Z DTEND;VALUE=DATE-TIME:20120207T182000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-39@cern.ch DESCRIPTION:Speakers: ASSMANN\, Ralph Wolfgang (CERN)\nMachine development sessions were performed in 2011 during dedicated slots of beam time. Thes e MD studies were scheduled and planned in detail well before\, reflecting the agreed priorities: further optimizing machine performance\, exploring beam parameters beyond design targets\, assessing machine limitations\, t esting new concepts and machine settings. The MD's in 2012 will build on t he successful 2011 experience. The proposed priorities are discussed. A pa rticular emphasis is put on how to best prepare future LHC running in view of the upcoming LHC shutdown in 2013/14 and the recommissioning of the LH C with double beam energy and nominal luminosity by 2014/15.\n\nhttp://ind ico.cern.ch/contributionDisplay.py?contribId=39&sessionId=4&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=39&sessionId=4& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:First demonstration with beam of the Achromatic Telescopic Squeeze (ATS) DTSTART;VALUE=DATE-TIME:20120206T183000Z DTEND;VALUE=DATE-TIME:20120206T185000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-12@cern.ch DESCRIPTION:Speakers: FARTOUKH\, Stephane (CERN)\nThe Achromatic Telescopi c Squeezing (ATS) scheme is a novel squeezing mechanism\, which is (almost fully) compatible with the existing hardware of the LHC\, and enables bot h the production and the chromatic correction of very low beta*. The basi c principles of the ATS scheme will be reminded together with its basic mo tivation which is to deliver a very ambitious beta* of 10-15 cm in view of the even more ambitious performance commitments taken by the HL-LHC proje ct. In this context\, a few dedicated beam experiments were meticulously p repared and took place at the LHC in 2011. The results obtained will be hi ghlighted\, demonstrating already the viability of the scheme. The plans f or 2012 will be discussed\, with a few optics considerations which could a lready justify the implementation of the ATS scheme in the nominal machine \, depending on which beta* limits will be met first\, and that the ATS ca n solve (e.g. optics matchability\, chromatic aberrations) and obviously c annot: the aperture of the existing triplet.\n\nhttp://indico.cern.ch/cont ributionDisplay.py?contribId=12&sessionId=1&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=12&sessionId=1& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:LS1 general planning and strategy for LHC\, LHC injectors DTSTART;VALUE=DATE-TIME:20120208T073000Z DTEND;VALUE=DATE-TIME:20120208T075000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-15@cern.ch DESCRIPTION:Speakers: FORAZ\, Katy (CERN)\nThe goal of Long Shutdown 1 is to perform the full maintenance of equipment\, and the necessary consolida tion and upgrade activities in order to ensure reliable LHC operation at n ominal performance from mid 2014.\nLong Shutdown 1 concerns not only LHC b ut also its injectors. In order to ensure that resources will be available an analysis is in progress to detect conflict/overload and to decide what is compulsory\, what we can afford and what we have to postpone to Long S hutdown 2. The strategy\, time key drivers\, constraints and draft schedul e will be presented.\n\nhttp://indico.cern.ch/contributionDisplay.py?contr ibId=15&sessionId=3&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=15&sessionId=3& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:SPS: scrubbing or coating?- DTSTART;VALUE=DATE-TIME:20120209T180000Z DTEND;VALUE=DATE-TIME:20120209T182000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-58@cern.ch DESCRIPTION:Speakers: JIMENEZ\, Jose Miguel (CERN)\nThe operation of the S PS with high intensity bunched beams is limited by the electron cloud buil ding-up in both the arcs and long straight sections. Two consolidation opt ions have been considered: mitigation of the electron cloud using coatings or relying\, as before\, on the scrubbing runs. A status report on both o ptions will be given with a particular emphasis on measurements plans for 2012 and pending issues. The testing needs\, corresponding beam parameters and MD time in 2012 will be addressed. The criteria for the decision maki ng and the corresponding schedule will be discussed.\n\nhttp://indico.cern .ch/contributionDisplay.py?contribId=58&sessionId=7&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=58&sessionId=7& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:LHC consolidation of the superconducting circuits DTSTART;VALUE=DATE-TIME:20120208T083000Z DTEND;VALUE=DATE-TIME:20120208T091000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-17@cern.ch DESCRIPTION:Speakers: TOCK\, Jean-Philippe (CERN)\nAll the activities nece ssary to consolidate the LHC superconducting circuits are given\, especial ly the consolidation of the main splices\, exchange of weak cryomagnets\, the consolidation of the DFBAs and the special interventions. For each of them\, the baseline strategy will be presented\, highlighting the reasons that lead to these choices and the remaining risk level.\nIn particular\, the progress of the work of the LHC splices task force\, the recommendatio ns of the second LHC splices review (November 2011) and their analysis are reported. Finally\, the work planning\, the organization chart and the as sociated resources will be detailed.\n\nhttp://indico.cern.ch/contribution Display.py?contribId=17&sessionId=3&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=17&sessionId=3& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Powering tests before LHC warm-up: What is new from Chamonix 2011? DTSTART;VALUE=DATE-TIME:20120208T080000Z DTEND;VALUE=DATE-TIME:20120208T082000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-16@cern.ch DESCRIPTION:Speakers: POJER\, Mirko (CERN)\nAt the end of 2012\, the Large Hadron Collider will enter its first programmed long stop (LS1). The prob lem at the origin of 2008 incident will be definitely treated and the main circuits will then be able to run at the design current value without pro tection issues. At Chamonix 2011\, a proposal was done for a series of pow ering tests to be performed just before the LS1 to investigate other poten tial limitations in the machine\, which could be fixed during the same mai ntenance period. A review of these powering tests is presented\, together with the list of investigation to be performed by the electrical quality a ssurance (ElQA) team. A tentative planning is as well proposed.\nMoreover \, following complementary activities during the LS1\, a huge campaign of individual system tests will have to be as well performed during the shutd own. Attention will be put on the preliminary list of needed re-qualificat ions.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=16&session Id=3&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=16&sessionId=3& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Optics Options DTSTART;VALUE=DATE-TIME:20120207T163000Z DTEND;VALUE=DATE-TIME:20120207T165000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-33@cern.ch DESCRIPTION:Speakers: GIOVANNOZZI\, Massimo (CERN)\nThe experience from th e past LHC proton run has provided plenty of information and can be used t o define possible scenarios for the 2012 physics run. The key parameters s uch as beta* and crossing angle will be reviewed assuming a 4 TeV beam ene rgy and considering options for 25 ns and 50 ns. Possible scenarios for th e high-beta optics configuration during the 2012 run will be presented.\n\ nhttp://indico.cern.ch/contributionDisplay.py?contribId=33&sessionId=4&con fId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=33&sessionId=4& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Quenches: will there be any? DTSTART;VALUE=DATE-TIME:20120209T103000Z DTEND;VALUE=DATE-TIME:20120209T105000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-54@cern.ch DESCRIPTION:Speakers: VERWEIJ\, Arjan (CERN)\nQuenches in superconducting circuits are part of the normal operation of the LHC\, and can never be ex cluded. Operation at 3.5 TeV resulted in only a small amount of quenches i n 2011\, especially because most magnets were operated below 20% of the cr itical current\, resulting in a temperature margin of about 5 K. When oper ating at about 6.5-7 TeV beam energy\, the temperature margin will only be about 1.5 K and the magnets will be much more sensitive to beam losses\, while at the same time the beam intensity will be higher. In this talk I w ill discuss the quench sensitivity of the magnets due to beam losses. I wi ll also present the probability of increased quenching of the superconduct ing circuits due to other effects such as higher currents and ramp rates\, increased EM coupling\, and in some cases reduced QPS thresholds.\n\nhttp ://indico.cern.ch/contributionDisplay.py?contribId=54&sessionId=6&confId=1 64089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=54&sessionId=6& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:LHC experiments upgrade and maintenance DTSTART;VALUE=DATE-TIME:20120208T160000Z DTEND;VALUE=DATE-TIME:20120208T161500Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-31@cern.ch DESCRIPTION:Speakers: NESSI\, Marzio (CERN)\nAll experiments plan an effec tive usage of the LS1 shutdown period. After three years of running they w ill go through a consolidation phase\, mostly to fix problems which have e merged over time\, like single points of failure in the infrastructure\, f ailures of low voltage power supplies and optical links.\nUpgrade of some detector components will start\, manly related to the beam pipe\, the inne rmost tracker elements and the trigger system. Detector components\, which had to be staged for cost reason in 2003\, will then enter into the detec tor setup. The goal is to be fully ready for the new energy regime at nom inal luminosity.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId =31&sessionId=5&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=31&sessionId=5& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Magnet powering with zero downtime - a dream? DTSTART;VALUE=DATE-TIME:20120209T082000Z DTEND;VALUE=DATE-TIME:20120209T084000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-49@cern.ch DESCRIPTION:Speakers: ZERLAUTH\, Markus (CERN)\nDespite a number of improv ements already applied in the course of the year\, the magnet powering sys tem of the LHC still accounts for around 50% of the premature beam dumps. This number might even further increase when moving to higher beam energie s in the next years. With mitigations of radiation effects and the prospec ts for beam induced magnet quenches being discussed elsewhere\, we aim at identifying possible mid- and long-term improvements within the various eq uipment systems to further reduce the number of equipment failures leading to a loss of the particle beams. Amongst others\, this includes the sensi tivity of equipment to external causes such as electromagnetic perturbatio ns or perturbations on the electrical network. To conclude\, the gain of t he identified mitigations will have to be balanced against the potential i mpact on schedule and cost.\n\nhttp://indico.cern.ch/contributionDisplay.p y?contribId=49&sessionId=6&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=49&sessionId=6& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Performance Reach in the LHC for 2012 DTSTART;VALUE=DATE-TIME:20120207T173000Z DTEND;VALUE=DATE-TIME:20120207T175000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-37@cern.ch DESCRIPTION:Speakers: ARDUINI\, Gianluigi (CERN)\nBased on the 2011 experi ence and Machine Development study results the performance reach of the of the LHC with 25 and 50 ns beams will be addressed for operation at 3.5 an d 4 TeV. The possible scrubbing scenarios and potential intensity limitati ons resulting from vacuum\, heating will be taken into account wherever po ssible.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=37&sessi onId=4&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=37&sessionId=4& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:EN-EL upgrade and consolidation DTSTART;VALUE=DATE-TIME:20120208T165000Z DTEND;VALUE=DATE-TIME:20120208T170500Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-36@cern.ch DESCRIPTION:Speakers: DUVAL\, Francois (CERN)\nEN/EL will have a huge prog ram of work during LS1. All our projects are being organised in order to c oncentrate efforts for LS1 on tasks possible only during shutdowns of the machines. Therefore the EL program for the shutdown will commence early (J anuary 2012) and will be completed later (2015). EN/EL is now starting to increase engineering resources so that newcomers will have at least a mini mum period of time for training and integration. The scale of this increas e in resources will be limited by the reasonable capacity of EN/EL core st aff to manage it. In other words\, not all the requested activities will b e possible and prioritisation will be necessary.\nThree different types of activities are planned and will be prioritized for the next long shut dow n: \n- accelerators infrastructure maintenance\,\n- consolidation of aging elements of EN/EL infrastructure (part of a 15 years program to substanti ally increase the reliability and availability of the power distribution n etwork).\n- user requests (EN/EL estimates that only 50% of the LS1 reques ts are currently known). The main activities will be the contributions to the R2E project\, the BE/BI upgrade projects and the RF upgrade project in SPS (BA3).\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=36&s essionId=5&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=36&sessionId=5& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Collimation settings and performance DTSTART;VALUE=DATE-TIME:20120207T170000Z DTEND;VALUE=DATE-TIME:20120207T172000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-35@cern.ch DESCRIPTION:Speakers: BRUCE\, Roderik (CERN)\nCollimator settings and avai lable aperture are key parameters for deciding the reach in beta*. Based o n MDs and operational experience in 2011\, a review is given of the measur ed aperture and the achievable margins and settings of the collimators. In particular\, the tight collimation scheme is evaluated in terms of possib le gains and necessary operational changes.\n\nhttp://indico.cern.ch/contr ibutionDisplay.py?contribId=35&sessionId=4&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=35&sessionId=4& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:QPS upgrade and machine protection during LS1 DTSTART;VALUE=DATE-TIME:20120208T162500Z DTEND;VALUE=DATE-TIME:20120208T164000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-34@cern.ch DESCRIPTION:Speakers: DENZ\, Reiner (CERN)\nThe presentation will explain all the proposed changes and discuss the impact on other shutdown activiti es.\nThe upgrade of the LHC Quench Protection System QPS during LS1 with r espect to radiation to electronics will concern the re-location of equipme nt and installation of new radiation tolerant hardware. The midterm plan f or further R2E upgrades will be addressed.\nThe protection systems for ins ertion region magnets and inner triplets will be equipped with a dedicated bus-bar splice supervision including some additional modifications in ord er to improve the EMC immunity.\nThe extension of the supervision capabili ties of the QPS will concern the quench heater circuits\, the earth voltag e feelers and some tools to ease the system maintenance. The protection of the undulators will be revised in order to allow more transparent operati on.\nThe installation of snubber capacitors and arc chambers for the main quad circuits will be complete the upgrade of the energy extraction system s. \nFinally the re-commissioning of the protection systems prior to the p owering tests will be addressed.\n\nhttp://indico.cern.ch/contributionDisp lay.py?contribId=34&sessionId=5&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=34&sessionId=5& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Will LHCb be running during the HL-LHC era? DTSTART;VALUE=DATE-TIME:20120209T161500Z DTEND;VALUE=DATE-TIME:20120209T162500Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-55@cern.ch DESCRIPTION:Speakers: SCHMIDT\, Burkhard (CERN)\nThe LHCb collaboration su bmitted in March 2011 a 'Letter of Intent' for upgrading the detector by 2 018\, in order to take data at a luminosity of 1-2x10^33/cm^2/s after LS2 with a detector read out at 40 MHz. A more flexible software-based trigger ing strategy will allow to increase trigger efficiencies especially in dec ays to hadronic final states. LHCb intends to take data for another 10 yea rs after LS2 in parallel to ATLAS and CMS\, aiming at a integrated luminos ity of at least 50 fb-1. We plan to take data with 25ns bunch spacing and to use luminosity leveling\, as done at present. After a short physics mot ivation the talk will review the desired running conditions of LHCb and ot her machine related requirements.\n\nhttp://indico.cern.ch/contributionDis play.py?contribId=55&sessionId=7&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=55&sessionId=7& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:What is the maximum reasonable energy? DTSTART;VALUE=DATE-TIME:20120208T183000Z DTEND;VALUE=DATE-TIME:20120208T185000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-48@cern.ch DESCRIPTION:Speakers: TODESCO\, Ezio (CERN)\nIn 2008 all the LHC main dipo le circuits were trained to 5 TeV\, two sectors to 6 TeV\, and one sector was pushed up to 6.6 TeV. In the 5-6 TeV range\, a few quenches were neede d to retrain the LHC dipoles\, and none for the quadrupoles. On the other hand\, in the 6-7 TeV range a larger than expected number of quenches was observed in the main dipoles. Using this limited set of data\, tentative e stimates were given to guess the number of quenches needed to reach nomina l energy. After three years\, the only additional experimental data are t he retraining of the magnets individually tested at SM18\, either coming f rom the spares or from the 3-4 sector. After presenting this additional i nformation\, we will consider the different scenarios that can be envisage d to train the LHC main magnets after the Long Shut-down 1\, the expected energy\, the impact on the commissioning time and the associated risk.\n\n http://indico.cern.ch/contributionDisplay.py?contribId=48&sessionId=5&conf Id=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=48&sessionId=5& confId=164089 END:VEVENT BEGIN:VEVENT SUMMARY:Necessary LIU studies in the injectors during 2012 DTSTART;VALUE=DATE-TIME:20120209T173000Z DTEND;VALUE=DATE-TIME:20120209T175000Z DTSTAMP;VALUE=DATE-TIME:20130519T193057Z UID:indico-contribution-164089-57@cern.ch DESCRIPTION:Speakers: RUMOLO\, Giovanni (CERN)\nA significant fraction of the Machine Development (MD) time in the LHC injectors in 2011 was devoted to the study of the intensity limitations in the injectors (e.g. space ch arge effects in PS and SPS\, electron cloud effects in the PS and SPS\, si ngle bunch and multi-bunch instabilities in PS and SPS\, emittance preserv ation across the injector chain\, etc.). The main results achieved in 2011 will be presented as well as the questions that still remain unresolved a nd are of relevance for the LIU project. 2012 MDs will also continue explo ring the potential of scenarios that might become operational in the futur e\, like the development of a low gamma transition optics in the SPS or al ternative production schemes for the LHC beams in the PS. \nA tentative p rioritized list of studies and their requirements in terms of machine time \, resources and instrumentations will be provided.\n\nhttp://indico.cern. ch/contributionDisplay.py?contribId=57&sessionId=7&confId=164089 LOCATION:Chamonix URL:http://indico.cern.ch/contributionDisplay.py?contribId=57&sessionId=7& confId=164089 END:VEVENT END:VCALENDAR