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LARP/LAFS Instrumentation at the LHC

LARP/LAFS Instrumentation at the LHC. Eric Prebys Accelerator Physics Center Program Director, LARP. US LHC Accelerator Research Program (LARP). Proposed in 2002 to coordinate efforts at US labs related to the LHC accelerator (as opposed to CMS or ATLAS) Originally FNAL, BNL, and LBNL

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LARP/LAFS Instrumentation at the LHC

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  1. LARP/LAFS Instrumentation at the LHC Eric Prebys Accelerator Physics Center Program Director, LARP

  2. US LHC Accelerator Research Program (LARP) • Proposed in 2002 to coordinate efforts at US labs related to the LHC accelerator (as opposed to CMS or ATLAS) • Originally FNAL, BNL, and LBNL • SLAC joined shortly thereafter • Some work (AC Dipole) supported at UT Austin • Currently $12-13M/yr + coordination of core resources • LARP Goals • Advance International Cooperation in High Energy Accelerators • Advance High Energy Physics • By helping the LHC integrate luminosity as quickly as possible • Advance U.S. Accelerator Science and Technology • LARP includes projects related to initial operation, but a significant part of the program concerns the LHC upgrades AEM Talk - LARP/LAFS Instrumentation

  3. LARP Contributions to initial LHC Operation • Schottky detector • Used for non-perturbative tune measurements (+chromaticities, momentum spread and transverse emmitances) • Tune tracking • Implement a PLL with pick-ups and quads to lock LHC tune • Investigating generalization to chromaticity tracking • AC dipole • US AC dipole to drive beam • Measure both linear and non-linear beam optics • Luminosity monitor • High radiation ionization detector integrated with the LHC neutral beam absorber (TAN) at IP 1 and 5. • Improved synchrotron light monitor • Alan Fisher improved the light collection optics in the SLM • Low level RF tools • Leverage SLAC expertise for characterization and optimizationof RF cavities AEM Talk - LARP/LAFS Instrumentation

  4. LHC Accelerator-Fermilab Software (LAFS) • It was decided early that LARP itself would not support software projects • The idea was the LARP would do R&D, and the promising technology (along with the required software) would be handed off to someone else. • For this reason, the LAFS groups was created. Charter members: • Dave McGinnis • Jean Slaughter • Suzanne Gysin • Elliott McCrory • Jim Patrick AEM Talk - LARP/LAFS Instrumentation

  5. Major LAFS Tasks* • Role-based access control (RBAC): sophisticated access control for accelerator related applications • Susanne Gysin spent 9 months at CERN gathering information, writing requirements and implementing version 1 • Wire scanner app. • Elliott McCrory worked on this app. during his two years at CERN • Already being used extensively • Beam Synchrotron Radiation Monitor (BSRT) app And daemon: • Monitor beam synchrotron radiation to measure bunch shape and verify abort gap • Schottky application: • Set schottky DAQ parameters, read and display data • Lumi monitor application: • GUI to control and display data from the lumi monitor Joint involvement with LARP *courtesy Elliott McCrory AEM Talk - LARP/LAFS Instrumentation

  6. Schottky detector • Proposed by LARP • Installed in collaboration with CERN • Application written by LAFS (J. Cai) Allows tune to be monitored on selected buckets (simulated data) AEM Talk - LARP/LAFS Instrumentation

  7. Lumi Detector Installation at IP5 In-situ noise measurement Simulated signal AEM Talk - LARP/LAFS Instrumentation

  8. AC Dipole • By driving the beam near the (aliased) tune, one can probe linear and non-linear optics • 4 AC dipoles installed at CERN based on tests in the Tevatron (R. Miyamoto) Audio amplifiers Sextupole term AEM Talk - LARP/LAFS Instrumentation

  9. Sync. Light Monitor (Improved by LARP and LAFS) • Used to measure beam profile and monitor abort gap • Alan Fisher (LARP LTV from SLAC) proposed and implemented dramatically improved optics to accommodate shifting source location AEM Talk - LARP/LAFS Instrumentation

  10. LLRF Tools • Leverage RF tools and techniques developed at PEP-II • Effort led by John Fox • Configuration tools used extensively during LHC RF commissioning AEM Talk - LARP/LAFS Instrumentation

  11. Wirescanner (real data, LAFS application) AEM Talk - LARP/LAFS Instrumentation

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