BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Transverse damper operation DTSTART;VALUE=DATE-TIME:20101208T110000Z DTEND;VALUE=DATE-TIME:20101208T112000Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-28@cern.ch DESCRIPTION:Speakers: HOFLE\, W. ()\nObservations vs expectations\n\nhttp: //indico.cern.ch/contributionDisplay.py?contribId=28&sessionId=2&confId=10 7310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=28&sessionId=2& confId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:ATLAS: highlights from the first run DTSTART;VALUE=DATE-TIME:20101208T173000Z DTEND;VALUE=DATE-TIME:20101208T175000Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-64@cern.ch DESCRIPTION:Speakers: GIANOTTI\, Fabiola ()\nhttp://indico.cern.ch/contrib utionDisplay.py?contribId=64&sessionId=8&confId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=64&sessionId=8& confId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:ALICE: The 2010 LHC Experience DTSTART;VALUE=DATE-TIME:20101208T175000Z DTEND;VALUE=DATE-TIME:20101208T181000Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-65@cern.ch DESCRIPTION:Speakers: WERNER\, Riegler ()\, on behalf of Jurgen Schukraft ()\nhttp://indico.cern.ch/contributionDisplay.py?contribId=65&sessionId=8& confId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=65&sessionId=8& confId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:CMS 2010 and Prospects for 2011-12 DTSTART;VALUE=DATE-TIME:20101208T181000Z DTEND;VALUE=DATE-TIME:20101208T183000Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-66@cern.ch DESCRIPTION:Speakers: CAMPORESI\, Tiziano ()\, on behalf of Guido Tonelli ()\nhttp://indico.cern.ch/contributionDisplay.py?contribId=66&sessionId=8& confId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=66&sessionId=8& confId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:Compliments to LHC from LHCb DTSTART;VALUE=DATE-TIME:20101208T183000Z DTEND;VALUE=DATE-TIME:20101208T185000Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-67@cern.ch DESCRIPTION:Speakers: ANDREI\, Golutvin ()\nhttp://indico.cern.ch/contribu tionDisplay.py?contribId=67&sessionId=8&confId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=67&sessionId=8& confId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:The LHC RF: Operation 2010 and Plans for 2011 DTSTART;VALUE=DATE-TIME:20101207T162500Z DTEND;VALUE=DATE-TIME:20101207T164500Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-34@cern.ch DESCRIPTION:Speakers: BAUDRENGHIEN\, P. ()\nWe will first briefly present the intended RF operation\, as of the original Design Report. We will then review the operation 2010: From the first collisions of single bunch pilo t to the emittance blow-up required for nominal single-bunch intensity. RF noise will be briefly mentioned and results of bunch lengthening during p hysics will be presented. The difficulties to fill the machine given the intolerance of the BLMs to radiation created by capture loss will be remin ded. There will be a brief summary of klystron and cavity faults. The seco nd part will address operation 2011. The planned improvements will be pres ented (longitudinal damper\, tools to ease energy matching\, upgrade of th e RF measurements). Finally the cavity impedance issue will be revisited with emphasis on the stability with RF feedback and the scenario of a klys tron trip will be studied.\n\nhttp://indico.cern.ch/contributionDisplay.py ?contribId=34&sessionId=0&confId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=34&sessionId=0& confId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:LHC Beam parameters: pushing the envelope? DTSTART;VALUE=DATE-TIME:20101209T094000Z DTEND;VALUE=DATE-TIME:20101209T100000Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-24@cern.ch DESCRIPTION:Speakers: METRAL\, E. ()\nThe goal for 2011 is to deliver an i ntegrated luminosity of one inverse femtobarn to the experiments. This wil l require to gain an order of magnitude in peak luminosity\, i.e. run with values of more than 1E33 cm-2s-1\, whereas a maximum of ~2.07E32 cm-2s-1 was achieved so far. Many collective effects were observed this year\, fir st when the intensity per bunch was increased and subsequently when the nu mber of bunches was pushed up and the bunch spacing was reduced. A critica l review will be made to examine which parameters can be realistically use d to increase the luminosity\, analysing the risks and the consequences. A scenario is proposed as well as a back-up solution.\n\nhttp://indico.cern .ch/contributionDisplay.py?contribId=24&sessionId=5&confId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=24&sessionId=5& confId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:Bunch by bunch beam instrumentation DTSTART;VALUE=DATE-TIME:20101208T100000Z DTEND;VALUE=DATE-TIME:20101208T103000Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-25@cern.ch DESCRIPTION:Speakers: LEFEVRE\, T. ()\nThis talk describes the LHC bunch b y bunch beam instrumentation. The status of all the different systems are reviewed: Wire scanner\, Synchrotron light monitor\, Beam Position monito r\, Schottky monitor\, BCT\, Wall current monitor\, Longitudinal density m onitors and Luminosity monitors. The achieved performances in 2010 and the already known limitations of both the hardware and the software will be d iscussed. The plans for upgrades in 2011 will finally be presented.\n\nhtt p://indico.cern.ch/contributionDisplay.py?contribId=25&sessionId=2&confId= 107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=25&sessionId=2& confId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:Feedbacks: status\, operational dependencies and outlook for 2011 DTSTART;VALUE=DATE-TIME:20101208T103000Z DTEND;VALUE=DATE-TIME:20101208T110000Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-26@cern.ch DESCRIPTION:Speakers: STEINHAGEN\, R. ()\nThe tune measurement and FB saga . PLL as workhorse for 2011? FB and transverse FB. Q' FB - shall we modula te in every fill? \nOrbit FB: improvements for 2011.\n\nhttp://indico.cer n.ch/contributionDisplay.py?contribId=26&sessionId=2&confId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=26&sessionId=2& confId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:BPM: status\, measurement reliability and outlook for 2011 DTSTART;VALUE=DATE-TIME:20101208T112000Z DTEND;VALUE=DATE-TIME:20101208T114000Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-27@cern.ch DESCRIPTION:Speakers: CALVO\, E. ()\nThis talk will present an overview of the performance of the LHC Beam Position System during 2010. Its dependen ce to beam intensity and surface rack temperature variations are discussed in more details. The modifications currently envisaged to improve the pre sent system will be finally presented.\n\nhttp://indico.cern.ch/contributi onDisplay.py?contribId=27&sessionId=2&confId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=27&sessionId=2& confId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:LHC Beam-Beam DTSTART;VALUE=DATE-TIME:20101209T082000Z DTEND;VALUE=DATE-TIME:20101209T084000Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-20@cern.ch DESCRIPTION:Speakers: HERR\, W. ()\nFirst experiences with colliding beams have been collected during the 2010 LHC run and some observations of beam -beam effects will be reported. The observations are interpreted and criti cally compared with the expectations and strategies proposed at the previo us workshop. Based on the available information\, possible limitations are evaluated and strategies for the optimization are derived.\n\nhttp://indi co.cern.ch/contributionDisplay.py?contribId=20&sessionId=5&confId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=20&sessionId=5& confId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:Strategy for luminosity optimisation DTSTART;VALUE=DATE-TIME:20101209T084000Z DTEND;VALUE=DATE-TIME:20101209T090000Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-21@cern.ch DESCRIPTION:Speakers: WHITE\, S. ()\nIntegrated luminosity is a key parame ter for the performance of a particle collider and depends both on beam pa rameters and operational efficiency. The experimental detectors are turned on and start acquiring useful data only when the machine is declared as s table\, it is therefore important to minimize the duration of the activiti es from the collapsing of the separation bumps until STABLE BEAM is declar ed. After a review of the current procedure and tools used to bring beams into collision and optimize luminosity\, observations and lessons learnt d uring the 2010 proton run will be presented. The reproducibility and impli cation of the current procedure regarding machine protection and operation efficiency will be discussed based on this first experience.\n\nhttp://in dico.cern.ch/contributionDisplay.py?contribId=21&sessionId=5&confId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=21&sessionId=5& confId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:Hump: how did it impact the luminosity performance? DTSTART;VALUE=DATE-TIME:20101209T092000Z DTEND;VALUE=DATE-TIME:20101209T094000Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-23@cern.ch DESCRIPTION:Speakers: ARDUINI\, G. ()\nThe status of the measurements perf ormed to characterize and identify the origin of the so-called hump will b e presented as well as its impact on beam performance and the countermeasu res found to mitigate its effects. The directions for future investigation s will be outlined.\n\nhttp://indico.cern.ch/contributionDisplay.py?contri bId=23&sessionId=5&confId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=23&sessionId=5& confId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:Can we get a reliable on-line measurements of the transverse beam size? DTSTART;VALUE=DATE-TIME:20101208T114000Z DTEND;VALUE=DATE-TIME:20101208T120000Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-29@cern.ch DESCRIPTION:Speakers: RONCAROLO\, F. ()\nThe transverse beam emittances of the LHC proton and ion beams can be inferred by measuring the beam sizes with Wire Scanner (WS)\, Synchrotron Radiation (BSRT) and Beam Gas Ionizat ion (BGI) monitors. This presentation covers all aspects related to the o peration of such devices in 2010 with a particular emphasis on the monitor s performance with respect to their design specifications and expected si gnals. The absolute and relative accuracy of the emittance measurement is discussed\, including cross calibration among the three instruments and wi th the luminous region estimation during collisions at the LHC experiments . This allows reviewing the reliability of the on-line data and of the val ues published in the logging database. In addition\, an overview of the pr ogrammed hardware and software upgrades is given.\n\nhttp://indico.cern.ch /contributionDisplay.py?contribId=29&sessionId=2&confId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=29&sessionId=2& confId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:Software and control issues DTSTART;VALUE=DATE-TIME:20101208T082500Z DTEND;VALUE=DATE-TIME:20101208T085000Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-1@cern.ch DESCRIPTION:Speakers: JACQUET\, D. ()\nThe software applications and fixed displays in the control room are the unique windows to the LHC\, the inte rface used to give it orders\, diagnose its state of health and control it s behaviour. The better tools we have to communicate\, the more efficient is the operation team to detect and cure problems\, and also run the accel erator in an efficient way. Despite the impressive number of well working applications available in CCC\, there is still room for improvement. This presentation will describe the main difficulties and issues encountered du ring 2010 LHC run that could be solved by improving the existing software applications\, or by creating new user interfaces.\n\nhttp://indico.cern.c h/contributionDisplay.py?contribId=1&sessionId=1&confId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=1&sessionId=1&c onfId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:How to improve turn-around DTSTART;VALUE=DATE-TIME:20101208T080000Z DTEND;VALUE=DATE-TIME:20101208T082500Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-0@cern.ch DESCRIPTION:Speakers: REDAELLI\, S. ()\nWhere did we lose time (injection\ , ramp\, squeeze\, etc.). What can we do to minimize that (in the LHC and injectors)?\nCritical review of the operational procedures\nSqueeze: what can be improved? shall we still consider the option of a combined ramp and (partial?) squeeze? What are the implications of that: setting-up time\, controls\, reliability\, machine protection. Impact on collimation\, feedb acks\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=0&sessionId =1&confId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=0&sessionId=1&c onfId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:Do we understand everything about MP system response? DTSTART;VALUE=DATE-TIME:20101208T130000Z DTEND;VALUE=DATE-TIME:20101208T131500Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-3@cern.ch DESCRIPTION:Speakers: ZERLAUTH\, M. ()\nThe presentation will give a brief overview on the performance of the machine protection system during the 2 010 run with an emphasis on highlighting suspicious events which still nee d to be fully understood. Improvements and mitigations of potential holes in the protection systems will be discussed along with their impact on the 2011 run. A summary of the currently available tools and necessary improv ements for the assessment of beam dump events will conclude the presentati on.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=3&sessionId= 3&confId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=3&sessionId=3&c onfId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:What do we need to understand and optimize the LHC? DTSTART;VALUE=DATE-TIME:20101208T091500Z DTEND;VALUE=DATE-TIME:20101208T094000Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-2@cern.ch DESCRIPTION:Speakers: BRUNING\, O. ()\nCan we monitor all the parameters r elevant for machine performance (e.g. in terms of luminosity)?\nWhat can h elp us in pin-pointing the source of “non-confomities” (e.g. is it in the LHC\, is it in the injectors”)\nWhat is missing? \nDo we have the to ols required for data analysis and performance analysis? Fill-to-fill com parison\, comparison with expectations\nCan data mining and correlation to ols be enhanced (e.g. TIMBER?)? How?\n\nhttp://indico.cern.ch/contribution Display.py?contribId=2&sessionId=1&confId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=2&sessionId=1&c onfId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:How low can we go? Getting below 3.5 m b* DTSTART;VALUE=DATE-TIME:20101208T133000Z DTEND;VALUE=DATE-TIME:20101208T135000Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-5@cern.ch DESCRIPTION:Speakers: BRUCE\, R. ()\nThe LHC has made remarkable progress during 2010\, fulfilling its ambitious goal for the year in terms of lumin osity. For 2011\, even higher performance has to be reached. One way of fu rther increasing luminosity is to reduce the beam size at the interaction points\, which is determined by the optical function beta∗. However\, wh en beta∗ is decreased\, so is the margin to the triplet aperture in term s of beam σ. This aperture must be protected from beam losses by the tert iary collimators (TCTs)\, which in turn have to be shadowed by other upstr eam collimators. This imposes a limit on the minimum achievable beta∗. I n this talk\, we discuss estimates of the available triplet aperture\, the different margins required to guarantee protection (TCTs to aperture and TCTs to collimators in interaction region 6) as well as the conditions req uired for moving in collimators and protection devices further. All estima tes of margins have to be based on assumptions on variations in central or bit and optical functions. Finally we conclude on the achievable beta∗ f or different running scenarios and discuss the available margins during lu minosity scans.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId= 5&sessionId=3&confId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=5&sessionId=3&c onfId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:LBDS and abort gap cleaning DTSTART;VALUE=DATE-TIME:20101208T131500Z DTEND;VALUE=DATE-TIME:20101208T133000Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-4@cern.ch DESCRIPTION:Speakers: BRACCO\, C. ()\nA number of possible failure scenari os and estimated occurrence were defined for the LHC Beam Dump System (LBD S). An analysis of the LIBDS performance during the first year of the LHC operation is presented and compared with respect to requirements and expec tations. Several qualification tests have been regularly performed to asse ss the protection provided by the system in the eventuality of a failure. Possible hardware upgrades and improvements of machine protection test and operation procedures are explored. Abort gap cleaning deployment\, relate d diagnostic and interlocking are discussed.\n\nhttp://indico.cern.ch/cont ributionDisplay.py?contribId=4&sessionId=3&confId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=4&sessionId=3&c onfId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:The human factor DTSTART;VALUE=DATE-TIME:20101208T141000Z DTEND;VALUE=DATE-TIME:20101208T143000Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-7@cern.ch DESCRIPTION:Speakers: MACPHERSON\, A. ()\nThe presentation will address th e issues of the human risk factor for the machine protection and operation of the LHC and will highlight some of the key risk situations with exampl es taken from the 2010 run. Emphasis is placed on risk factors that are p resent in the current modus operandi as well as the foreseen improvements\ , both procedural and otherwise\, that are intended to mitigate the risks in the 2011 run. A discussion on potential sources of human risk factors that lie outside the standard operations envelope and protective procedure s will also be given.\n\nhttp://indico.cern.ch/contributionDisplay.py?cont ribId=7&sessionId=3&confId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=7&sessionId=3&c onfId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:Injection protection: are we taking it seriously\, how can we make it safer? DTSTART;VALUE=DATE-TIME:20101208T135000Z DTEND;VALUE=DATE-TIME:20101208T141000Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-6@cern.ch DESCRIPTION:Speakers: KAIN\, V. ()\nThe experience with the injection prot ection system during the 2010 run will be summarized\, the setting-up time s and stability will be evaluated. Weak points of the protections system a t injection which became apparent with first high intensity experience wil l be discussed and solutions for 2011 presented if possible. The line bet ween injection quality and injection protection issues will be emphasized and clarifying measures for the involved software tools to be implemented during the shutdown will be presented.\n\nhttp://indico.cern.ch/contributi onDisplay.py?contribId=6&sessionId=3&confId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=6&sessionId=3&c onfId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:Operational efficiency DTSTART;VALUE=DATE-TIME:20101207T160500Z DTEND;VALUE=DATE-TIME:20101207T162500Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-9@cern.ch DESCRIPTION:Speakers: VENTURINI DELSOLARO\, W. ()\nAn overlook on the beam and machine statistics in the 2010 run is given. We report on the machine availability and efficiency for physics and give a breakdown of the downt ime according to the various technical systems. We revise the frequency an d duration of the technical stops with respect to their impact on the mach ine availability. Finally the tools presently available for the collection of this kind of data are reviewed and needs for 2011 are defined.\n\nhttp ://indico.cern.ch/contributionDisplay.py?contribId=9&sessionId=0&confId=10 7310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=9&sessionId=0&c onfId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:Performance and results DTSTART;VALUE=DATE-TIME:20101207T154500Z DTEND;VALUE=DATE-TIME:20101207T160500Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-8@cern.ch DESCRIPTION:Speakers: FERRO-LUZZI\, M. ()\nThis talk will present what the LHC experiments would like to\nsee in 2011\, in terms of delivered lumino sity and beam conditions. An attempt will be made to see how this could fi t in a run scenario\, including a heavy ion run. Special conditions will a lso be discussed\, like sqrt(s) = 2.76 TeV proton\nphysics\, medium large beta star proton optics. First feeback on some observations that were made end of this year will be given\, e.g. on beam-gas background\, satellite bunches\, BCM thresholds. A critical review of 2010 operation will be mad e (handshake\, use of beam modes\, operational procedures\, etc.)\, with e mphasis on issues and proposals for improvements for 2011 (and further).\n \nhttp://indico.cern.ch/contributionDisplay.py?contribId=8&sessionId=0&con fId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=8&sessionId=0&c onfId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:Closing remarks DTSTART;VALUE=DATE-TIME:20101209T115000Z DTEND;VALUE=DATE-TIME:20101209T120000Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-35@cern.ch DESCRIPTION:Speakers: MYERS\, S. ()\nhttp://indico.cern.ch/contributionDis play.py?contribId=35&sessionId=6&confId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=35&sessionId=6& confId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:BLM thresholds: limiting locations DTSTART;VALUE=DATE-TIME:20101208T165000Z DTEND;VALUE=DATE-TIME:20101208T171000Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-17@cern.ch DESCRIPTION:Speakers: NORDT\, A. ()\nAround 4000 Beam Loss Monitors are in stalled around the LHC ring and they must detect dangerous beam losses whi ch could quench the superconducting \nmagnets or damage components of the accelerator. The LHC BLM system was working very well during the 2009 and 2010 run. All dangerous beam losses have been detected by the system and t he beam dump was always initiated correctly so that no damage or quench oc curred. However a further fine-tuning of the beam abort thresholds is stil l needed\, especially for the high luminosity and high beam intensity runs being planned for 2011. Possible sources and affects of a reduced signal to noise ratio of the beam loss monitors during the upcoming 2011 run will be addressed. Furthermore it will be verified if the specified beam loss rates can be achieved\, at what locations we have possible limiting thresh olds and to what extend an increase of the thresholds at what elements is needed. A special focus will be given on losses and thresholds at and arou nd collimators\, including also possible correlations between collimator m ovements\, vacuum conditions and beam losses.\n\nhttp://indico.cern.ch/con tributionDisplay.py?contribId=17&sessionId=4&confId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=17&sessionId=4& confId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:Injection/extraction losses DTSTART;VALUE=DATE-TIME:20101208T160000Z DTEND;VALUE=DATE-TIME:20101208T163000Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-15@cern.ch DESCRIPTION:Speakers: BARTMANN\, W. ()\nSingle pass losses at injection in to LHC and extraction to the beam dump are distinguished regarding their o rigin. Potential mitigations as increasing the opening of the injection pr otection devices or temporarily blinding the BLM system at injection are d iscussed. \nThe limits for injecting higher intensities in 2011 due to los ses above BLM thresholds together with the risk for quenching magnets or d amaging devices are extrapolated from observed loss levels in 2010 operati on.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=15&sessionId =4&confId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=15&sessionId=4& confId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:Parameters for 2011 - 2011 LHC beam operation plans (incl. intensi ty steps) DTSTART;VALUE=DATE-TIME:20101209T103000Z DTEND;VALUE=DATE-TIME:20101209T110500Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-32@cern.ch DESCRIPTION:Speakers: WENNINGER\, J. ()\nThe assumed LHC beam parameters f or 2011 are first summarised. The overview of the 2011 schedule is present ed and includes hardware commissioning\, beam re-commissioning\, re-valida tion\, scrubbing\, technical stops\, MD\, ions and special physics run req uests. A proposal is made for the strategy in intensity stepping up and po tential issues are described together with possible actions. Finally\, th e potential peak and integrated luminosity are given\n\nhttp://indico.cern .ch/contributionDisplay.py?contribId=32&sessionId=6&confId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=32&sessionId=6& confId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:Intensity ramp-up DTSTART;VALUE=DATE-TIME:20101207T172500Z DTEND;VALUE=DATE-TIME:20101207T174500Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-11@cern.ch DESCRIPTION:Speakers: LAMONT\, M. ()\nTotal beam intensity in 2010 saw a s low ramp up during the first months of commissioning. Following bunch trai n commissioning and qualification the rate increase significantly. A criti cal look at the year's progress is presented. Given this the potential str ategies for 2011 are examined with particular attention given to machine p rotection qualification. Issues to be addressed include: the speed of the process\; the need\, or not\, for another MPP review\; the use\, or not\, of more formal approach.\n\nhttp://indico.cern.ch/contributionDisplay.py? contribId=11&sessionId=0&confId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=11&sessionId=0& confId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:Beam quality and availability from the injectors DTSTART;VALUE=DATE-TIME:20101207T164500Z DTEND;VALUE=DATE-TIME:20101207T170500Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-10@cern.ch DESCRIPTION:Speakers: PAPOTTI\, G. ()\nThe success of the first year of op eration of the LHC would not have been possible without the hard work from the whole injector chain. Beams with different intensity\, emittance and bunch spacing have been produced and tuned according to the often varying needs of the LHC. A review of the produced beam parameters is given\, as f or example transverse and longitudinal emittances\, equality between bunch es\, presence of satellites. Additionally a critical view on how time coul d have been saved and which tools could be improved for the future is also given.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=10&sessi onId=0&confId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=10&sessionId=0& confId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:50 and 75 ns operation DTSTART;VALUE=DATE-TIME:20101207T170500Z DTEND;VALUE=DATE-TIME:20101207T172500Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-39@cern.ch DESCRIPTION:Speakers: ARDUINI\, G. ()\nTwo machine development sessions ha ve been performed in order to understand potential limitations for the ope ration of the machine with 50 and 75 ns beam spacing.\nThe main results of the studies and a possible outlook for 2011 will be presented.\n\nhttp:// indico.cern.ch/contributionDisplay.py?contribId=39&sessionId=0&confId=1073 10 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=39&sessionId=0& confId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:General discussion DTSTART;VALUE=DATE-TIME:20101207T174500Z DTEND;VALUE=DATE-TIME:20101207T180000Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-12@cern.ch DESCRIPTION:Speakers: \nhttp://indico.cern.ch/contributionDisplay.py?contr ibId=12&sessionId=0&confId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=12&sessionId=0& confId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:The LHC optics in practice DTSTART;VALUE=DATE-TIME:20101209T090000Z DTEND;VALUE=DATE-TIME:20101209T092000Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-22@cern.ch DESCRIPTION:Speakers: TOMAS\, R. ()\nDuring LHC 2010 run\, approximately 4 0 experimental sessions for optics Measurements were carried out. Both loc al and global corrections were implemented demonstrating the feasibility o f achieving 10% peak beta-beating. The long-term optics stability is prese nted with extrapolations of errors down to beta* of 0.55 m. Operational is sues arising during corrections\, as the treatment of hysteresis\, will al so be discussed.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId =22&sessionId=5&confId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=22&sessionId=5& confId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:Multi-turn losses and cleaning DTSTART;VALUE=DATE-TIME:20101208T153000Z DTEND;VALUE=DATE-TIME:20101208T160000Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-14@cern.ch DESCRIPTION:Speakers: WOLLMANN\, D. ()\nIn the LHC all multi-turn losses s hould occur at the collimators in the cleaning insertions. The cleaning in efficiency (leakage rate) is the figure of merit to describe the performan ce. In combination with the quench limit of the superconductive magnets an d the instantaneous life time of the beam this defines the cleaning depend ent beam intensity limit of the LHC. In addition\, limits can arise from r adiation-induced effects\, like radiation damage and radiation to electron ics. In this paper the used collimator settings\, the required setup time\ , the reliability of collimation (all multi-turn losses at collimators)\, and the achieved proton/ion cleaning inefficiency are discussed. Observed and expected losses are compared. The performance change during the months of operation is reviewed. In addition\, the peak losses during high inten sity runs\, losses caused by instabilities\, and the resulting beam life t imes are discussed. Taking the observations into account the intensity rea ch with collimation at 3.5 TeV is reviewed.\n\nhttp://indico.cern.ch/contr ibutionDisplay.py?contribId=14&sessionId=4&confId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=14&sessionId=4& confId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:Losses away from collimators: statistics and extrapolation DTSTART;VALUE=DATE-TIME:20101208T163000Z DTEND;VALUE=DATE-TIME:20101208T165000Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-16@cern.ch DESCRIPTION:Speakers: HOLZER\, E.B. ()\nThe Beam Loss Monitors (BLMs) in l ong straight sections and the dispersion suppressors being covered in the following talk\, this presentation focuses on beam losses in the LHC arcs. The main task of the approximately 2200 arc monitors is quench prevention . The arcs are generally very well protected by the collimators. The aim o f this talk is to search for possible holes in this protection\, and to pr esent the impact of short (single turn to several turn) and/or highly loca lized losses on the arcs. Among others\, leakage from the collimation regi ons\, losses originating from the interaction points and ‘UFO’ type lo ss have been analyzed.\nPossible limits in beam intensity and luminosity w ill be discussed.\nFurthermore\, the requirements for BLM system tests fol lowing the interventions during the technical stop will be presented.\n\nh ttp://indico.cern.ch/contributionDisplay.py?contribId=16&sessionId=4&confI d=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=16&sessionId=4& confId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:Longitudinal and transverse emittance preservation DTSTART;VALUE=DATE-TIME:20101209T080000Z DTEND;VALUE=DATE-TIME:20101209T082000Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-19@cern.ch DESCRIPTION:Speakers: KAIN\, V. ()\nThe preservation of the transverse emi ttance is crucial for luminosity performance. At the LHC design stage the total allowed emittance increase was set to 7 % throughout the LHC cycle. The injection process is particularly critical in this respect. Results of an analysis quantifying the emittance increase from injection to stable b eams will be presented. The luminosity goals of the 2010 proton run could be achieved with fewer bunches than initially foreseen. This is due to the excellent performance of the injectors concerning the higher than nominal number of protons per bunch and also the smaller than nominal emittances. Smaller emittances mean more energy density\, possible machine protection concerns will be addressed in this presentation. Recommendations for requ ired instrumentation and emittance preservation goals for next year’s ru n will be given.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId =19&sessionId=5&confId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=19&sessionId=5& confId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:Workshop summary - strategy for beam commissioning in 2011 DTSTART;VALUE=DATE-TIME:20101209T110500Z DTEND;VALUE=DATE-TIME:20101209T115000Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-31@cern.ch DESCRIPTION:Speakers: LAMONT\, M. ()\nA very first attempt is made to synt hesis the outcomes of the workshop. A list of issues and prioritized actio ns will be presented. With broad brush strokes\, the beam commissioning st rategy for 2011 will be outlined and the requirements the different teams involved will summarized.\n\nhttp://indico.cern.ch/contributionDisplay.py? contribId=31&sessionId=6&confId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=31&sessionId=6& confId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:General discussion DTSTART;VALUE=DATE-TIME:20101208T143000Z DTEND;VALUE=DATE-TIME:20101208T150000Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-36@cern.ch DESCRIPTION:Speakers: \nhttp://indico.cern.ch/contributionDisplay.py?contr ibId=36&sessionId=3&confId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=36&sessionId=3& confId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:Can we improve the magnetic model/cycle and its effects? DTSTART;VALUE=DATE-TIME:20101208T085000Z DTEND;VALUE=DATE-TIME:20101208T091500Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-33@cern.ch DESCRIPTION:Speakers: TODESCO\, E. ()\nWe recall the precycling strategy d efined for operation and we give an overview of how it has been applied in the 2010 run: in how many cases the previous physics run has been used as a precycle\, in how many cases we precycled the magnets\, and how we did it w.r.t. specifications. 2010 run was characterized in some periods by no n-nominal conditions such as lower ramp rate (2 A/s) in the main magnets a nd lower current (2 kA\, 4 kA and 6 kA) as a main magnet flattop current. We will review these different phases and try to correlate with the beam o bservables. \n \nWe analyse the reproducibility of tune and chromaticity\, giving an estimate of the present precision of the magnetic model and dis cussing if it is possible to improve it. We review how the hysteresis is p resently treated in the field model\, and its drawbacks on the beta beatin g corrections during the squeeze. Possible strategies to solve the hystere sis issue will be presented.\n\nhttp://indico.cern.ch/contributionDisplay. py?contribId=33&sessionId=1&confId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=33&sessionId=1& confId=107310 END:VEVENT BEGIN:VEVENT SUMMARY:General discussion DTSTART;VALUE=DATE-TIME:20101208T171000Z DTEND;VALUE=DATE-TIME:20101208T173000Z DTSTAMP;VALUE=DATE-TIME:20130521T201740Z UID:indico-contribution-107310-18@cern.ch DESCRIPTION:Speakers: \nhttp://indico.cern.ch/contributionDisplay.py?contr ibId=18&sessionId=4&confId=107310 LOCATION:Hilton\, Evian URL:http://indico.cern.ch/contributionDisplay.py?contribId=18&sessionId=4& confId=107310 END:VEVENT END:VCALENDAR