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CARE-HHH LHC Crab Cavity Validation Mini-Workshop

Welcome. CARE-HHH LHC Crab Cavity Validation Mini-Workshop. Organizers: Rama Calaga , Rogelio Tomas, Frank Zimmermann Acknowledgements: Walter Scandale , Yi- Peng Sun, Jean-Pierre Koutchouk , Ilan Ben- Zvi , Steve Peggs , Katsunobu Oide , Akira Yamamoto . LHC global crab . LHC

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CARE-HHH LHC Crab Cavity Validation Mini-Workshop

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  1. Welcome CARE-HHHLHC Crab Cavity Validation Mini-Workshop Organizers: Rama Calaga, Rogelio Tomas, Frank Zimmermann Acknowledgements: Walter Scandale, Yi-Peng Sun, Jean-Pierre Koutchouk, Ilan Ben-Zvi, Steve Peggs, KatsunobuOide, Akira Yamamoto LHC global crab LHC local crab crabbed beams in KEKB We acknowledge the support of the European Community-Research Infrastructure Activity under the FP6 "Structuring the European Research Area" programme (CARE, contract number RII3-CT-2003-506395) Bob Palmer

  2. motivation “Piwinski angle” qc/2 luminosity reduction factor without crab cavity nominalLHC effective beam size s→s/Rf “LPA” upgrade “FCC” upgrade

  3. brief history

  4. Piwinski angles in LHC and KEKB

  5. mini-workshop goals • discuss prospects of crab cavities in LHC upgrades • review status of cryomodule development and beam dynamics • establish validity requirements for crab cavities necessary prior to their installation into the LHC • provide guidance & coordination for global collaborators

  6. statistics & organization • 28 registered participants 16 CERN, 4 KEK, 2 CI/DL, 2 BNL, 2 SLAC, 1 FNAL, 1 NIKHEF, 1 Oslo • some US + additional KEK participation via WebEx • 4 sessions, each ending with 30-60 minutes discussion • possibility of no-host dinner if interest

  7. thank you for attending& good luck!

  8. Reminder: LHC upgrade paths stronger triplet magnets D0 dipole small-angle crab cavity early separation (ES) full crab crossing (FCC) L. Evans, W. Scandale, F. Zimmermann J.-P. Koutchouk stronger triplet magnets small-angle crab cavity larger-aperture triplet magnets • ultimate beam (1.7x1011 protons/bunch, 25 spacing), b* ~10 cm • early-separation dipoles in side detectors , crab cavities • → hardware inside ATLAS & CMS detectors, • first hadron crab cavities; off-d b • ultimate LHC beam (1.7x1011 protons/bunch, 25 spacing) • b* ~10 cm • crab cavities with 60% higher voltage • → first hadron crab cavities, off-d b-beat wire compensator large Piwinski angle (LPA) • 50 ns spacing, longer & more intense bunches • (5x1011 protons/bunch) • b*~25 cm, no elements inside detectors • long-range beam-beam wire compensation • → novel operating regime for hadron colliders, • beam generation F. Ruggiero, W. Scandale. F. Zimmermann

  9. large Piwinski angle (LPA) full crab crossing (FCC) early separation (ES)

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