BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:LHC Online Modeling DTSTART;VALUE=DATE-TIME:20110621T131000Z DTEND;VALUE=DATE-TIME:20110621T133000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-42@cern.ch DESCRIPTION:Speakers: MUELLER\, Gabriel Johannes (Technische Universitaet Dresden-Unknown-Unknown)\nThe Large Hadron Collider (LHC) at CERN is a par ticular challenging high energy\, superconducting machine with respect to the design as well as to the operation. That requires a sophisticated soft ware environment and a good collaboration of the teams involved to transfe r the simulation output for desired beam configurations into the control s ystem\, verify and check the control system settings\, drive the machine t o arrive at the desired configuration and to provide an online simulation of the current status of the machine. To support the operation and the pro gress of comissioning of the LHC\, efforts were recently devoted towards t he design and implementation of a software framework aimed to use the comp uting power of the beam dynamics code MAD-X in the framework of the java-b ased LHC control and measurement environment. In this talk the basic archi tecture of the online modeling\, existing applications and their usage for operation will be presented.\n\nhttp://indico.cern.ch/contributionDisplay .py?contribId=42&sessionId=6&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=42&sessionId=6& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:Refined techniques for phase measurements DTSTART;VALUE=DATE-TIME:20110621T085500Z DTEND;VALUE=DATE-TIME:20110621T091000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-48@cern.ch DESCRIPTION:Speakers: BIANCACCI\, Nicolo (Universita di Roma I 'La Sapienz a'-Universita e INFN\, Roma I)\nExtracting the phase from signals in beam position monitors is a common operation in accelerator facilities and can be used to reconstruct many optics parameters as well as the impedance dis tribution in the machine. The main limit in these operations is set by the accuracy of the phase measurement. On this topic we will present a recent ly developed algorithm\, named all-phase FFT (apFFT)\, which allows reachi ng better accuracies in the case of simulations or measurements for which the noise level is low. Comparisons with typical FFT and SUSSIX will also be presented as well as an application to the localization of transverse b eam coupling impedance sources.\n\nhttp://indico.cern.ch/contributionDispl ay.py?contribId=48&sessionId=5&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=48&sessionId=5& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:RHIC online modeling and experience with feedbacks DTSTART;VALUE=DATE-TIME:20110621T124000Z DTEND;VALUE=DATE-TIME:20110621T131000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-43@cern.ch DESCRIPTION:Speakers: Dr. ROBERT-DEMOLAIZE\, Guillaume (BNL)\nThe RHIC onl ine model is made of a lattice and energy ramp design used as inputs to t wo computation servers\, RampManager and OptiCalc\, each with their own de dicated purpose. In the past\, the RHIC energy ramp was based entirely on stepstones to allow for orbit and tune control and beta* squeeze schemes e volving throughout the energy ramp. RampManager loads all required databas es\, services all incoming requests and calls the corresponding functions. OptiCalc is the optics calculation and matching module which provides als o dedicated algorithms for each requested task. In this presentation we fi rst review the various components of both of these servers. Next we show how the online model has evolved to interface with multiple feedback loops now used routinely at RHIC to accelerate\, squeeze\, and steer the beams into collisions and for periodic orbit control during normal physics store s. Dedicated accelerator physics experiments profit also from these enhan ced capabilities\; for example controlling these beam properties using fee dback while dynamically squeezing the beta-star(s).\n\nhttp://indico.cern. ch/contributionDisplay.py?contribId=43&sessionId=6&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=43&sessionId=6& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:LHC Operations DTSTART;VALUE=DATE-TIME:20110622T070000Z DTEND;VALUE=DATE-TIME:20110622T073000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-60@cern.ch DESCRIPTION:Speakers: LAMONT\, Mike (CERN)\nThe present challenges in term s of measurement\, correction and modelling for LHC operations are briefly summarized. There is potential for pushing the performance in the next co uple of years - the options and the implications of these for operations a re discussed. In the longer term\, operational challenges will include the move to higher energy\, the potential squeeze to nominal beta* and the pu sh to nominal beam intensity. The demands that these will make on the oper ational measurement\, correction and modelling strategies are outlined.\n\ nhttp://indico.cern.ch/contributionDisplay.py?contribId=60&sessionId=9&con fId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=60&sessionId=9& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:Machine Development plans at the LHC DTSTART;VALUE=DATE-TIME:20110622T073000Z DTEND;VALUE=DATE-TIME:20110622T075000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-61@cern.ch DESCRIPTION:Speakers: Dr. ZIMMERMANN\, Frank (AB/ABP)\nSince spring 2011 r egular machine development (MD) periods are scheduled for the LHC. Present ly a year of LHC running features about five blocks of 5 days each of dedi cated machine studies\, which are aimed at calibration and validation\, at improving operational procedures\, or at preparing for future operation modes as well as for future upgrades. An overview is given of the LHC MDs performed so far\, including a few key results\, and the future plan is de scribed\, with particular emphasis on items related to optics control.\n\n http://indico.cern.ch/contributionDisplay.py?contribId=61&sessionId=9&conf Id=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=61&sessionId=9& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:Light Source Instrumentation DTSTART;VALUE=DATE-TIME:20110621T142000Z DTEND;VALUE=DATE-TIME:20110621T144000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-63@cern.ch DESCRIPTION:Speakers: DECKER\, Glenn (ANL)\nThird-generation light sources have reached a very mature state of development\, with lattice measuremen t and correction performed routinely at the level of 1% or better. High-re solution beam position monitoring coupled with high-speed data acquisition and processing have made this possible. At x-ray free electron laser faci lities such as LCLS\, resonant cavity beam position monitors with sub-micr on single-shot resolution allow sophisticated beam-based alignment and opt ics measurement capability. In addition to beam position monitoring\, sync hrotron light diagnostics provide powerful tools in the determination of e mittance\, coupling\, dispersion\, and time structure. An overview of the different diagnostics in use at light sources with an emphasis on applicat ion to lattice measurement and correction will be presented.\n\nhttp://ind ico.cern.ch/contributionDisplay.py?contribId=63&sessionId=7&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=63&sessionId=7& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:LOCO Overview DTSTART;VALUE=DATE-TIME:20110620T140000Z DTEND;VALUE=DATE-TIME:20110620T142000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-64@cern.ch DESCRIPTION:Speakers: SAFRANEK\, James (SLAC)\nThe LOCO (Linear Optics fro m Closed Orbits) algorithm is used to find and correct errors in the linea r optics of storage rings. This technique has been used to correct the op tics of many storage rings. I will give examples of using LOCO to correct beta functions and dispersion\, correct coupling\, measure impedance\, an d correct transport line optics. I will describe constrained fitting\, wh ich improves the quality of LOCO fitting results for many storage rings.\n \nhttp://indico.cern.ch/contributionDisplay.py?contribId=64&sessionId=3&co nfId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=64&sessionId=3& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:Welcome DTSTART;VALUE=DATE-TIME:20110620T070000Z DTEND;VALUE=DATE-TIME:20110620T070500Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-65@cern.ch DESCRIPTION:Speakers: KOUTCHOUK\, Jean-Pierre (CERN)\nhttp://indico.cern.c h/contributionDisplay.py?contribId=65&sessionId=0&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=65&sessionId=0& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:Probing non-linear fields with orbit bumps DTSTART;VALUE=DATE-TIME:20110621T093000Z DTEND;VALUE=DATE-TIME:20110621T095000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-67@cern.ch DESCRIPTION:Speakers: PARFENOVA\, Angelina (GSI)\nThe nonlinear tune respo nse matrix (NTRM) method was developed to diagnose the lattice nonlinear c omponents.\nIt explores a nonlinear tune response to a controlled closed o rbit deformation (COD).\nThe details and challenges of the experimental ap plication of the NTRM method are discussed.\nStatus of experimental recons truction of controlled sextupolar errors and natural sextupolar components of the SIS18 Synchrotron are presented.\n\nhttp://indico.cern.ch/contribu tionDisplay.py?contribId=67&sessionId=5&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=67&sessionId=5& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:LHC Injectors Upgrade project overview DTSTART;VALUE=DATE-TIME:20110622T084500Z DTEND;VALUE=DATE-TIME:20110622T090500Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-69@cern.ch DESCRIPTION:Speakers: GAROBY\, Roland (CERN)\nThe LHC Injectors Upgrade (L IU) project is in charge of making the CERN accelerator complex capable of reliably providing the beam required by the high luminosity LHC until at least 2030. Except for Linac4 which is already in construction\, the basel ine solution is to upgrade the existing accelerators\, PS Booster\, PS and SPS. The project is presently in a study phase\, the objective being to f inalize the implementation of the upgrades during the second long LHC shut down\, probably in 2018. The present limitations of the different acceler ators will be described\, as well as the improvements under consideration. \n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=69&sessionId=8& confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=69&sessionId=8& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:KEKB Experience DTSTART;VALUE=DATE-TIME:20110620T095000Z DTEND;VALUE=DATE-TIME:20110620T101000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-25@cern.ch DESCRIPTION:Speakers: OHNISHI\, Yukiyoshi (KEK)\nWe present optics measure ments and corrections in the KEKB commissioning. Beta functions\, dispersi ons\, X-Y coupling corrections have been applied to achieve higher luminos ity. In addition to the linear optics\, chromatic behaviours have been me asured and corrected. Chromatic X-Y coupling correction by using skew sext upole magnets helps to increase luminosity by about 20% than before the co rrection.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=25&ses sionId=1&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=25&sessionId=1& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:PEPII Experience DTSTART;VALUE=DATE-TIME:20110620T101000Z DTEND;VALUE=DATE-TIME:20110620T103000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-26@cern.ch DESCRIPTION:Speakers: Dr. YAN\, Yiton (SLAC)\nStarting from brief review o f driving modified betatron oscillation to show that resonance driving lea ds to non-modified betatron oscillation\, we will review how we made measu rement\, modeling\, and correction of the PEP-II low-energy ring and high- energy ring optics for improving luminosity. We will emphasize on that mat ching essentially unlimited number of Green’s functions had very much he lped PEP-II optics modeling. We may also briefly discuss its implication t o model non-modified LHC optics.\n\nhttp://indico.cern.ch/contributionDisp lay.py?contribId=26&sessionId=1&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=26&sessionId=1& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:SLS Experience DTSTART;VALUE=DATE-TIME:20110620T144000Z DTEND;VALUE=DATE-TIME:20110620T150000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-27@cern.ch DESCRIPTION:Speakers: AIBA\, Masamitsu ()\nSLS storage ring optics reaches the state-of-the-art through more than ten years operation as providing h igh quality synchrotron light to about 20 beam lines. The linear optics ha s been measured with the response of the tune to small variation of quadru pole strength and corrected based on SVD. The corrected optics allows us t o employ the model response matrix for the orbit correction/feedback and t he linear coupling correction. The nonlinear optics has been corrected usi ng pre-defined theoretical knobs to surppress relevant resonances. The bea m life time can then be sufficiently long. One of the highlights of SLS pe rformance is the small vertical emittance ~2 pm thanks to the well correct ed betatron coupling and vertical dispersion with dispersive and non-dispe rsive skew quadrupoles. Recently\, we introduced two more optics measureme nts\, namely LOCO and turn-by-turn BPM. The idea is to compare the results from independent measurements. This resulted in better understanding the machine and we achieved further small vertical emittance \n\nhttp://indico .cern.ch/contributionDisplay.py?contribId=27&sessionId=3&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=27&sessionId=3& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:Linear lattice errors at the ESRF\, measurement and correction DTSTART;VALUE=DATE-TIME:20110620T142000Z DTEND;VALUE=DATE-TIME:20110620T144000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-21@cern.ch DESCRIPTION:Speakers: Dr. PERRON\, Thomas (ESRF)\nESRF machine modeling ba sed on beam orbit measurements will be reviewed. Beta beating\, coupling a nd vertical dispersion are corrected from this model. The minimization of the coupling resonance driving terms (RDT) allowed to reduce vertical emit tance to record low values for the ESRF. Vertical dispersion then becomes a key parameter for any further reduction of vertical emittance: Its links to closed orbit errors and chromaticity will be discussed.\n\nhttp://indi co.cern.ch/contributionDisplay.py?contribId=21&sessionId=3&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=21&sessionId=3& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:FAIR project and optics challenges DTSTART;VALUE=DATE-TIME:20110622T092500Z DTEND;VALUE=DATE-TIME:20110622T094500Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-22@cern.ch DESCRIPTION:Speakers: Dr. FRANCHETTI\, Giuliano (GSI)\nBeam loss control i s an important issue in all superconducting accelerators. In the FAIR proj ect the requirement of beam loss control becomes demanding by the complica tions created from the high intensity. The response of the beam to the lin ear and nonlinear machine optics is magnified by the space charge. Issues of optics and resonance control (compensation) during storage and accelera tion becomes essential for machine performance. In this talk these issues are addressed.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=2 2&sessionId=8&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=22&sessionId=8& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:Linear Optics Measurements by TBT Analysis at Fermilab Booster DTSTART;VALUE=DATE-TIME:20110620T122000Z DTEND;VALUE=DATE-TIME:20110620T124000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-23@cern.ch DESCRIPTION:Speakers: GIANFELICE\, Eliana (Fermi National Accelerator Lab. (Fermilab))\nFermilab Booster accelerate protons from 0.4 to 8 GeV kineti c energy in 33 ms. The analysis of TBT data give a relatively straightforw ard mean of measuring linear optics and coupling. Results obtained by vari ous analysis method are presented.\n\nhttp://indico.cern.ch/contributionDi splay.py?contribId=23&sessionId=2&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=23&sessionId=2& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:LHC Instrumentation & future developments DTSTART;VALUE=DATE-TIME:20110621T140000Z DTEND;VALUE=DATE-TIME:20110621T142000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-45@cern.ch DESCRIPTION:Speakers: Dr. JONES\, Rhodri (CERN)\nhttp://indico.cern.ch/con tributionDisplay.py?contribId=45&sessionId=7&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=45&sessionId=7& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:SOLEIL Experience DTSTART;VALUE=DATE-TIME:20110620T150000Z DTEND;VALUE=DATE-TIME:20110620T152000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-28@cern.ch DESCRIPTION:Speakers: NADOLSKI\, Laurent (SOLEIL)\nThe SOLEIL 2.75 GeV thi rd generation synchrotron light source has been delivering photon beam to users since January 2007. The storage ring optics is based on a DBA latti ce\, very compact and strongly focusing to accommodate a 3.7 nm.rad horizo ntal emittance and a 1020 ph/s/mm2/mrad2/0.1*BW brilliance for a 354 m cir cumference storage ring. As of today 24 beam-lines are provided with a to p-up 400 mA electron beam with an orbit stability as low as 300 nm RMS in the vertical plane in the frequency range 0-150 Hz and a beam lifetime gre ater than 10 h. . To achieve such performance carefully modeling and optim ization of the linear and non-linear optics are required. In this talk res ults will be presented based on beam measurements. Examples of characteriz ation of the non-linear dynamics perturbations driven by insertion devices (22 IDs already installed) will be shown as these latter have complex mag netic fields and may have strong impacts of the facility performance. Stan dard techniques and their limitations for high performance synchrotron lig ht source will also be discussed.\n\nhttp://indico.cern.ch/contributionDis play.py?contribId=28&sessionId=3&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=28&sessionId=3& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:DIAMOND Experience DTSTART;VALUE=DATE-TIME:20110620T152000Z DTEND;VALUE=DATE-TIME:20110620T154000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-29@cern.ch DESCRIPTION:Speakers: BARTOLINI\, riccardo (Diamond Light Source and John Adams Institute)\nThe beta beating at the diamond storage ring has been re duced to less than 1% peak-to-peak and the linear coupling to 8e-4 at the source point\, providing a vertical emittance of about 2pm. Building upon this excellent control of the linear optics\, we have developed various te chniques for the calibration of the nonlinear model of the storage ring. E xperimental results based on FMA and driving terms analysis show that the calibrated nonlinear model reproduces with very good accuracy the main qua ntities characterising the nonlinear beam dynamics.\n\nhttp://indico.cern. ch/contributionDisplay.py?contribId=29&sessionId=3&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=29&sessionId=3& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:Model-Independent Analysis of Turn-by-Turn BPM Measurements in Sto rage Rings DTSTART;VALUE=DATE-TIME:20110621T080000Z DTEND;VALUE=DATE-TIME:20110621T082000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-40@cern.ch DESCRIPTION:Speakers: PETRENKO\, Alexey ()\nCoherent transverse beam oscil lations in the Tevatron were analyzed with the Model-Independent Analysis (MIA) technique. This allowed to obtain the model-independent values of co upled betatron amplitudes\, phase advances and dispersion function around the ring from a single kick measurement. In order to solve the MIA mode mi xing problem a new criterion of betatron mode independence was proposed. F urthermore\, we describe a MIA-based technique to locate vibrating magnets in a storage ring. Also MIA data analysis was applied to the data from LH C dipole kick measurements (at injection optics). In order to identify foc using errors the measurements were compared to the LHC design MAD-X model via calculation of local transport matrix elements and initial Twiss param eters for every pair (or triplet) of BPMs in the LHC. This allowed to obta in beta-functions not only in BPMs but everywhere in several long sections of LHC which are free of large focusing errors.\n\nhttp://indico.cern.ch/ contributionDisplay.py?contribId=40&sessionId=4&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=40&sessionId=4& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:LHC magnet modeling DTSTART;VALUE=DATE-TIME:20110621T120000Z DTEND;VALUE=DATE-TIME:20110621T122000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-41@cern.ch DESCRIPTION:Speakers: Dr. TODESCO\, Ezio (CERN)\nWe give an overview of th e strategy used for the magnetic modeling of the LHC. Magnetic measurement s are fit with a set of parametric equations (FiDeL) based on decompositio n of the main components of the magnetic field. These equations are impelm ented in the LHC control system LSA\,which is the tool used to power the m agnets. A dedicated code (WISE) creates the input files for tracking codes (MAD)\, providing the best knowledge of the accelerator field quality. An overiview of the main results of the early phase of LHC beam commissionin g and the main critical issues are outlined.\n\nhttp://indico.cern.ch/cont ributionDisplay.py?contribId=41&sessionId=6&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=41&sessionId=6& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:Optics codes DTSTART;VALUE=DATE-TIME:20110621T122000Z DTEND;VALUE=DATE-TIME:20110621T124000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-52@cern.ch DESCRIPTION:Speakers: Dr. EINFELD\, Dieter (CELLS)\nFor the design and lay out of accelerators "Beam-Dynamics" calculations have to be performed in order to show the functionality of the machine and to determine the specif ications and requirements of the different accelerator components (vacuum- system\, magnets\, power supplies\, correctors\, etc.). For these calculat ions the so called "Beam-Dynamic-Codes" are used\, as for example: MAD\, D IMAD\, BETA\, OPA\, AT\, TRACY\, ELEGANT\, ACCELERATICUM. In a collaborati on of SLS\, SOLEIL\, SPEAR III\, APS\, BINP and ALBA a comparison of these codes has been made for the lattices of SOLEIL\, APS and ALBA. In a first step the linear lattice parameters have been calculated and in a second s tep the nonlinear parameters as tune shifts with energy and amplitude as w ell the dynamic aperture including energy deviations. Within this seminar the results of this comparison will be presented and discussed.\n\nhttp:// indico.cern.ch/contributionDisplay.py?contribId=52&sessionId=6&confId=1325 26 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=52&sessionId=6& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:Beta* measurement and adjustment DTSTART;VALUE=DATE-TIME:20110621T091000Z DTEND;VALUE=DATE-TIME:20110621T093000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-49@cern.ch DESCRIPTION:Speakers: Dr. LEBEDEV\, Valeri (FNAL)\nGood understanding of T evatron optics was absolutely essential to maximize the Tevatron luminosit y and performance. The talk discusses optics measurements used to build th e Tevatron optics model and steps which were required to correct optics. A comparison of optics measurements with the orbit responce and the turn-by -turn measurements is also discussed.\n\nhttp://indico.cern.ch/contributio nDisplay.py?contribId=49&sessionId=5&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=49&sessionId=5& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:LOCO for LHC DTSTART;VALUE=DATE-TIME:20110621T070000Z DTEND;VALUE=DATE-TIME:20110621T072000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-35@cern.ch DESCRIPTION:Speakers: FUCHSBERGER\, Kajetan ()\nThe LOCO principle is base d on measuring orbit corrector responses and fitting numerical models to t he measured data. This principle is very well known and successfully appli ed in many fields. To be prepared for the commissioning of the LHC and its transfer lines\, a dedicated software project\, Aloha (Another Linear Opt ics Helper Application)\, was launched to cover the requirements for the L HC: Aloha is a Java reimplementation of the LOCO principle with many exten sions. This software was used extensively during the commissioning of the transfer lines and the LHC injection tests to identify optics errors and t o verify corrector- and monitor polarities with circulating beam in the LH C.\nIn this talk\, an overview of the used principles will be given\, resu lts of several example use cases during LHC commissioning will be presente d and the pros and cons of using the LOCO principle in the LHC will be ske tched.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=35&sessio nId=4&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=35&sessionId=4& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:Roman pots for beam diagnostics DTSTART;VALUE=DATE-TIME:20110621T144000Z DTEND;VALUE=DATE-TIME:20110621T150000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-39@cern.ch DESCRIPTION:Speakers: NIEWIADOMSKI\, Hubert (Brunel University)\nThe physi cs programme of the TOTEM experiment requires the detection of very forwar d protons scattered by only a few microradians out of the LHC beams. There fore\, the experiment has inserted stacks of planar Silicon detectors in m oveable near-beam telescopes (so called Roman Pots) located along the beam -line on both sides of the interaction point IP5. The precise knowledge of the LHC optics expressed by the beam transport matrices between the inter action point and the detectors’ location is of the key importance for th e proton kinematics reconstruction after the collision. The talk will repo rt the optics measurements performed by the TOTEM experiment based on the proton tracks reconstructed in the Roman Pots and will summarize the estim ated corrections of the LHC triplets of the IP5 sector for beta*=3.5m fill s.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=39&sessionId= 7&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=39&sessionId=7& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:Collider challenges DTSTART;VALUE=DATE-TIME:20110620T070500Z DTEND;VALUE=DATE-TIME:20110620T073000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-12@cern.ch DESCRIPTION:Speakers: TOMAS\, Rogelio (CERN)\nCurrent and future circular colliders aim at breaking the current luminosity records. This requires th e use of elaborated lattice designs\, combining innovative accelerator con cepts with pushed IR optics. In addition\, the particle detectors in the f orward scattering region require a very precise control and knowledge of t he optics along the interaction region. All these requirements set new cha llenges in the optics measurements and adjustments.\nNew or upgraded techn iques possibly in combination with higher resolution instrumentation shoul d be envisaged for the current and future colliders.\n\nhttp://indico.cern .ch/contributionDisplay.py?contribId=12&sessionId=0&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=12&sessionId=0& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:HERA experience DTSTART;VALUE=DATE-TIME:20110620T130000Z DTEND;VALUE=DATE-TIME:20110620T132000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-73@cern.ch DESCRIPTION:Speakers: HOLZER\, Bernhard (Deutsches Elektronen-Synchrotron (DESY)-Unknown-Unknown)\nHERA was designed as electron (or positron) - pro ton collider for maximum energies of 30 GeV for the leptons and 920 GeV f or the proton beam. Due to this large difference in beam energy\, the mach ine had to be built as two independent storage rings with common interacti on regions at the collision points.\nAs a special feature of the machine\, the different characteristics of the lepton and proton beams had to be co nsidered: The electron beam - due to synchrotron radiation strongly determ ined by its emittance and thus characterized by a flat aspect ratio in the transverse planes\, had to be well matched to the “round” proton beam at the two interaction points. In addition\, the dynamic influence of the electron mini beta magnets at the interaction region on the proton optics and orbit\, as well as the effect of the stray fields of the proton magne ts on the electron beam dynamics had to be compensated carefully to establ ish well defined beam optics during the complete machine cycle and to guar antee matched beam sizes of the electron and proton beam during beam colli sions. Starting from very basic measurements of the beta function in the b eginning of the HERA runperiod\, modern tools have been developed over the years and applied to measure and optimise the optical parameters like bet a function\, dispersion and effective beam size at the IP.\nThe talk will give an introduction into the lattice of the two HERA storage rings\, pres ent an overview about the historical development of the optics measurement s and summarise the results.\n\nhttp://indico.cern.ch/contributionDisplay. py?contribId=73&sessionId=2&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=73&sessionId=2& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:SuperB project overview DTSTART;VALUE=DATE-TIME:20110622T094500Z DTEND;VALUE=DATE-TIME:20110622T100500Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-72@cern.ch DESCRIPTION:Speakers: BIAGINI\, Marica (INFN)\nThe SuperB project for an a symmetric e+e- collider at the Y(4S) energy has been recently approved by the Italian Government. The Collider will be built in Italy\, but will pro fit of the work by a large international collaboration. The design is base d on the "large Piwinski angle and crab waist" collision scheme already su ccessfully tested at the DAFNE Phi-Factory at Frascati Labs. This talk wil l review the basic SuperB design principles and the status of R&D.\n\nhttp ://indico.cern.ch/contributionDisplay.py?contribId=72&sessionId=8&confId=1 32526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=72&sessionId=8& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:Experience with low emittance tuning tool for SuperB\, Diamond\, S LS\, and Dafne DTSTART;VALUE=DATE-TIME:20110620T124000Z DTEND;VALUE=DATE-TIME:20110620T130000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-71@cern.ch DESCRIPTION:Speakers: LIUZZO\, Simone (INFN)\nThe Low Emittance Tuning (LE T) algorithm\, developed for the SuperB project\, allows to obtain low emi ttance\, correcting simultaneously orbit\, dispersion\, coupling and beta- beating using correctors and skew quadrupoles. The technique determines an orbit that takes advantage of the passage off axis in sextupoles and quad rupoles lowering emittance of a factor almost ten (in simulations for Supe rB) respect to Dispersion Free Steering. BPM tilts are also estimated from the measurements and considered for correction. The technique has been te sted at Diamond and at SLS\, and is currently under test at Daphne. Prelim inary results are presented in this talk\n\nhttp://indico.cern.ch/contribu tionDisplay.py?contribId=71&sessionId=2&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=71&sessionId=2& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:HL-LHC project overview DTSTART;VALUE=DATE-TIME:20110622T075000Z DTEND;VALUE=DATE-TIME:20110622T081000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-70@cern.ch DESCRIPTION:Speakers: Prof. ROSSI\, Lucio (CERN)\nhttp://indico.cern.ch/co ntributionDisplay.py?contribId=70&sessionId=9&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=70&sessionId=9& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:RHIC Experience DTSTART;VALUE=DATE-TIME:20110620T085000Z DTEND;VALUE=DATE-TIME:20110620T091000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-15@cern.ch DESCRIPTION:Speakers: BAI\, Mei (BNL)\nThe optics measurement of RHIC pola rized protons at 250 GeV with squeezed beta* at IP6 and IP8 showed as lar ge as +-40% horizontal beta beat in the sector between IP6 and IP8. This i s a concern for further reducing beta* in RHIC to increase luminosity. \nI nspired by the success of LHC optics correction\, RHIC has the Sector-by- Sector Technique(SBST) installed during 2011 RHIC polarized proton run. Th e commissioning of this technique was first started in one of the RHIC two accelerators\, Blue ring. With a total of about 12 hour beam time\, we we re able to reduce the high horizontal beta beat in the sector between IP6 and IP8 by a factor of two. Fractional reduction of horizontal beta beat was also observed in other sectors\, except the sector between IP4 and IP5 . And the vertical beta beat was barely impacted. This talk presents the s tatus of current SBST commissioning in RHIC along with future plan.\n\nhtt p://indico.cern.ch/contributionDisplay.py?contribId=15&sessionId=1&confId= 132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=15&sessionId=1& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:RHIC non-linear chromaticity and IR corrections DTSTART;VALUE=DATE-TIME:20110621T101000Z DTEND;VALUE=DATE-TIME:20110621T103000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-58@cern.ch DESCRIPTION:Speakers: Dr. LUO\, Yun ()\nIn this talk we will review the me asurement\, modeling and correction of second order chromaticities\, the i nteraction region multipole errors\, and the third order resonance driving term in RHIC. We will focus on second order chromaticity modeling and cor rection. With a low beta* at IP6 and IP8\, the second order chromaticities have to be corrected for successful RF re-bucketing and good beam-beam li fetime at store. We find that the sources of second order chromaticities a re mostly localized in the IR6 and IR8. Therefore\, it is possible to mini mize them by adjusting the betatron phase advances between the two IPs.\n \nhttp://indico.cern.ch/contributionDisplay.py?contribId=58&sessionId=5&co nfId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=58&sessionId=5& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:Light sources challenges DTSTART;VALUE=DATE-TIME:20110620T073000Z DTEND;VALUE=DATE-TIME:20110620T080000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-13@cern.ch DESCRIPTION:Speakers: Prof. RIVKIN\, Leonid (Paul Scherrer Institute & EPF L)\nThe next generation of storage ring based light sources is approaching the diffraction limit in hard X-Ray range of the wavelengths. A factor of ten lower equilibrium horizontal emittance poses substantial challenges t o the designers and builders of these rings. Specifications on the buildin g blocks of the rings rely on advanced modeling of not only the non-linear optics but also of the main collective effects that contribute to the blo w-up of the emittance. The talk will outline some of the challenges that a re being faced by the ultimate storage ring based light source designs as well as by the damping rings designs for the future linear colliders.\n\nh ttp://indico.cern.ch/contributionDisplay.py?contribId=13&sessionId=0&confI d=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=13&sessionId=0& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:Action-Phase analysis DTSTART;VALUE=DATE-TIME:20110621T074000Z DTEND;VALUE=DATE-TIME:20110621T080000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-38@cern.ch DESCRIPTION:Speakers: CARDONA\, Javier Fernando (Departamento de Fisica-Un iversidad Nacional de Colombia)\nAction and phase analysis on turn by turn BPM data in the LHC show visible variation of action and phase variables in the LHC interaction regions. Linear optic errors are deduced from these quantities. Local skew quadrupole correctors and quadrupole triplets at e ach interaction region can be set according to such error estimations. Thi s work show the procedure to establish the relationship between the two of them.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=38&sessio nId=4&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=38&sessionId=4& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:Chromatic measurements in RHIC and LHC DTSTART;VALUE=DATE-TIME:20110621T095000Z DTEND;VALUE=DATE-TIME:20110621T101000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-59@cern.ch DESCRIPTION:Speakers: CALAGA\, Rama (BNL)\nIn RHIC\, the phase advance bet ween the two interaction points is optimized for an initial design beta*. This may not hold true as RHIC presently operates with a considerably redu ced beta*. Chromatic optics measurements from RHIC are presented the enlar ged beating is evident for reduced beta*. Phase advance changes between th e IPs are proposed as a first attempt to reduce the model chromatic beta-b eating. Recent measurements are performed to investigate the impact on the single beam lifetime and momentum aperture for the "modified" lattice. Me asurements from the LHC are also discussed.\n\nhttp://indico.cern.ch/contr ibutionDisplay.py?contribId=59&sessionId=5&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=59&sessionId=5& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:High intensity challenges DTSTART;VALUE=DATE-TIME:20110620T080000Z DTEND;VALUE=DATE-TIME:20110620T083000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-14@cern.ch DESCRIPTION:Speakers: PLUM\, Michael ()\nHigh intensity rings such as thos e found at the Oak Ridge and J-PARC spallation neutron sources have unique challenges compared to other types of rings. Examples include the importa nce of low beam loss throughout the entire cycle (including injection)\; a nd the effects of fringe fields and magnetic field overlap caused by large aperture\, low-aspect-ratio\, closely packed magnets. Of course high inte nsity rings also share many challenges with other types of rings\, includi ng collective effects such as instabilities and space charge tune shift\, and the need for more accurate simulations. This presentation will discuss the challenges facing high intensity rings\, and also suggest areas that could benefit from further development.\n\nhttp://indico.cern.ch/contribut ionDisplay.py?contribId=14&sessionId=0&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=14&sessionId=0& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:LHC Experience DTSTART;VALUE=DATE-TIME:20110620T093000Z DTEND;VALUE=DATE-TIME:20110620T095000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-17@cern.ch DESCRIPTION:Speakers: VANBAVINCKHOVE\, Glenn (Technische Universiteit Delf t)\nSince the LHC start-up in 2009\, numerous optics measurement and corre ction campaigns were conducted at various energies of the LHC energy cycle . Meticulous local optics corrections for each interaction region\, subseq uently followed by global corrections enabled to reach a record low beta-b eating for hadron colliders below 10% during the squeeze sequence from bet a* of 10m to 1.5m. The accurate magnet model\, precise field quality speci fication\, careful construction and installation strategy were key for the rapid convergence to be well within optics tolerances. However\, the furt her reduction of beta* by factor 3 to reach the design value at 7 TeV and a much greater reduction of up to a factor 10 for the IR upgrade pose a ch allenging path to maintain this low beta-beating levels. An overview of t he optics performance and the techniques employed at the LHC will be prese nted together with an outlook to the future.\n\nhttp://indico.cern.ch/cont ributionDisplay.py?contribId=17&sessionId=1&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=17&sessionId=1& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:Tevatron Experience DTSTART;VALUE=DATE-TIME:20110620T091000Z DTEND;VALUE=DATE-TIME:20110620T093000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-16@cern.ch DESCRIPTION:Speakers: Mr. LEBEDEV\, Valeri (FNAL)\nThe talk will present t he experience accumulated in the course of Tevatron Run II on the optics c orrection and improvement. Both the transfer lines and circular machines a re discussed. This work minimized the emittance growth related to ring-to- ring transfers to the level acceptable for collider operation. It also res ulted in an acceptance increse required to boost the antiproton production and to minimize beam loss at transfers as well as to optimize operation o f each machine and the entire complex.\n\nhttp://indico.cern.ch/contributi onDisplay.py?contribId=16&sessionId=1&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=16&sessionId=1& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:Non-linear modeling of accelerators DTSTART;VALUE=DATE-TIME:20110621T133000Z DTEND;VALUE=DATE-TIME:20110621T135000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-54@cern.ch DESCRIPTION:Speakers: SCHMIDT\, Frank (CERN)\nOnly very recently it became possible to even contemplate about effective non-linear modeling of accel erators\, on the other hand modern superconducting require such modeling f or proper correction of nonlinear effects. In recent years\, one has begun to carefully measure harmonics and misalignments of all magnets of an acc elerator and to provide transfer functions for the control system\, reliab le 1000 turn BPM systems have been made available including appropriate be am exciters\, optics codes have reached a new level of sophistication and new analysis tools have been developed for a direct measurement of nonline ar components. In essence\, non-linear modeling has become equivalent to l inear modeling.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId= 54&sessionId=6&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=54&sessionId=6& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:DAFNE Experience DTSTART;VALUE=DATE-TIME:20110620T120000Z DTEND;VALUE=DATE-TIME:20110620T122000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-31@cern.ch DESCRIPTION:Speakers: MILARDI\, Catia (INFN - LNF)\nDAΦNE\, the Frascati lepton collider working at the c.m. energy of the Φ meson resonance (1020 )\, consists of two independent rings. Each one is a quite short structure (~97 m) with many magnetic elements and no periodicity at all and is stro ngly affected by the detector solenoidal field (∫Bds = 2.4 Tm\, to be co mpared with a magnetic rigidity Bρ = 1.7 Tm). As a consequence the model parameters are far from being independent from each other.\nThe optics mo del is based on beam measurements\, which have been essential in remarking the collider limiting factors as well as in defining the strategy for the upgrades that have been implemented in the last years.\n\nhttp://indico.c ern.ch/contributionDisplay.py?contribId=31&sessionId=2&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=31&sessionId=2& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:The optics challenges of the LHC Upgrade and a novel concept to r each low beta* DTSTART;VALUE=DATE-TIME:20110622T081000Z DTEND;VALUE=DATE-TIME:20110622T083000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-51@cern.ch DESCRIPTION:Speakers: FARTOUKH\, Stephane (CERN)\nIncreasing the integrate d performance of the LHC by a factor of 5 to 6\, as requested for the expl oitation period 2020-2030\, cannot only be achieved by playing with one or two parameters in the luminosity formula\, but by pushing all of the them at or beyond the limits. Two of them\, beta* and/or the beta* aspect rati o can however reduce the requirements\, both on the beam parameters and/or on the new technologies needed for the upgrade (e.g. crab-cavity). \nThe reduction of beta*\, and a fortiori for a flat optics with a beta* even sm aller in one of the two planes\, was found however very challenging in the LHC due to very simple reasons: working at more less constant L* unless c hanging completely the detectors\, constant length of the final focus syst em (the so-called matching section for the LHC insertions) unless “displ acing the arcs”\, and a priori constant strength budget for the chromati c correction unless changing 500 two-in-one quadrupoles in the lattice. Un der these conditions\, and applying the classical approach where low-beta insertions with a squeezable optics are interleaved with arcs of machine t o transport the beam at constant optics\, the minimum possible beta* was f ound to be about 30 cm. A novel optics scheme called the “Achromatic Tel escopic Squeezing (ATS) Scheme has then be worked out in order to reach mu ch lower beta* and bring a touch of realism for the upgrade parameter list s which were proposed so far.\n\nhttp://indico.cern.ch/contributionDisplay .py?contribId=51&sessionId=9&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=51&sessionId=9& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:Optics Diagnostics with AC Dipoles (CANCELLED) DTSTART;VALUE=DATE-TIME:20110621T072000Z DTEND;VALUE=DATE-TIME:20110621T074000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-36@cern.ch DESCRIPTION:Speakers: MIYAMOTO\, Ryoichi (Brookhaven National Laboratory)\ nAn AC dipole is an exciter of a beam bunch for optics measurements based on observation of turn-by-turn orbits with beam position monitors. By driv ing the bunch with a sinusoidally oscillating dipole magnetic field\, whos e frequency is close to betatron frequency and amplitude is adiabatically ramped up and down\, the AC dipole can produce a sustained large oscillati on with almost no emittance growth. Non-destruction nature of the AC dipol e is particularly useful for slow cycled hadron rings with no dumping from synchrotron radiation and effectiveness of the AC dipole has been demonst rated in AGS\, SPS\, RHIC\, Tevatron\, and LHC. This talk presents a basic concept and operational experience of the AC dipole based optics measurem ent as well as address statistical and systematic limitation of this metho d.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=36&sessionId= 4&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=36&sessionId=4& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:Low gamma-t optics in the SPS DTSTART;VALUE=DATE-TIME:20110622T090500Z DTEND;VALUE=DATE-TIME:20110622T092500Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-34@cern.ch DESCRIPTION:Speakers: PAPAPHILIPPOU\, Yannis (CERN)\nIn order to increase the bunch current instability thresholds that limit the LHC bunch intensit ies in the SPS\, several optics were proposed targeting the reduction of t he transition energy. In particular\, a simple solution by decreasing the integer tunes of the actual working point by 6 units was developed and app lied to the real machine\, enabling the injection and acceleration up to t he flat top of single bunches with 3-fold increase in the intensity\, with in the nominal LHC-type beam sizes. This talk will review the measurements performed in the SPS for exploring the features of this optics with respe ct to the nominal ones. Particular emphasis will be given on studies under taken in order to build and compare a non-linear machine model for the dif ferent optics.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=3 4&sessionId=8&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=34&sessionId=8& confId=132526 END:VEVENT BEGIN:VEVENT SUMMARY:Beam based gain calibration (CANCELLED) DTSTART;VALUE=DATE-TIME:20110621T150000Z DTEND;VALUE=DATE-TIME:20110621T152000Z DTSTAMP;VALUE=DATE-TIME:20130523T011900Z UID:indico-contribution-132526-57@cern.ch DESCRIPTION:Speakers: SATOH\, Kotaro (KEK)\nGood quality beams\, for examp le\, extremely low emittance beams or beams with very low emittance ratio\ , are required in present-day accelerators\, in which quite sometimes stro ng nonlinear optics elements are needed. Since\, in such cases\, the optic s is dependent strongly on beam orbit deviation from the designed orbit\, the orbit stabilization is one of essential issues to realize good quality beams. It should be pointed out that a BPM usually detects beam position relative to the electric monitor center\, not the geometrical center\, and that the electric center likely drifts due to unexpected variation of imb alance\, or gains\, among the output signals from its electrodes. The imba lance is often introduced by drifts on transfer impedance through cables\, connectors\, attenuators and switches. This talk proposes a method to cal ibrate the imbalance by beam measurements and to detect the beam position relative to the stable geometrical monitor center. The talk also covers th e demonstration of the method in the KEKB.\n\nhttp://indico.cern.ch/contri butionDisplay.py?contribId=57&sessionId=7&confId=132526 LOCATION:CERN BE Auditorium Meyrin URL:http://indico.cern.ch/contributionDisplay.py?contribId=57&sessionId=7& confId=132526 END:VEVENT END:VCALENDAR