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Sabbi, G. L.

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MOPAS027 Energy Deposition Studies of Block-Coil Quadrupoles for the LHC Luminosity Upgrade 491
  • N. V. Mokhov, V. Kashikhin, M. Monville
    Fermilab, Batavia, Illinois
  • P. Ferracin, G. L. Sabbi
    LBNL, Berkeley, California
  Funding: Work supported by the Director, Office of Science, U. S. Department of Energy under Contract DE-AC02-05CH11231.

At the LHC upgrade luminosity of 1035 cm-2 s-1, collision product power in excess of a kW is deposited in the inner triplet quadrupoles. The quadrupole field sweeps secondary particles from pp-collisions into the superconducting coils, concentrating the power deposition at the magnetic mid-planes. The local peak power density can substantially exceed the conductor quench limits and reduce component lifetime. Under these conditions, block-coil geometries may result in overall improved performance by removing the superconductor from the magnetic mid-planes and/or allowing increased shielding at such locations. First realistic energy deposition simulations are performed for an interaction region based on block-coil quadrupoles with parameters suitable for the LHC upgrade. Results are presented on 3-D distributions of power density and accumulated dose in the inner triplet components as well as on dynamic heat loads on the cryogenic system. Optimization studies are performed on configuration and parameters of the beam pipe, cold bore and cooling channels. The feasibility of the proposed design is discussed.

THPMN005 Technical Challenges for Head-On Collisions and Extraction at the ILC 2716
  • O. Napoly, O. Delferriere, M. Durante, J. Payet, C. Rippon, D. Uriot
    CEA, Gif-sur-Yvette
  • M. Alabau, P. Bambade, J. Brossard, O. Dadoun, C. Rimbault
    LAL, Orsay
  • D. A.-K. Angal-Kalinin, F. Jackson, S. I. Tzenov
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
  • R. Appleby
    UMAN, Manchester
  • B. Balhan, J. Borburgh, B. Goddard
    CERN, Geneva
  • Y. Iwashita
    Kyoto ICR, Uji, Kyoto
  • L. Keller
    SLAC, Menlo Park, California
  • S. Kuroda
    KEK, Ibaraki
  • G. L. Sabbi
    LBNL, Berkeley, California
  Funding: EUROTeV Project Contract no.011899 RIDS

An interaction region with head-on collisions is considered as an alternative to the baseline ILC configuration. Progress in the final focus optics design includes engineered large bore superconducting final doublet magnets and their 3D magnetic integration in the detector solenoids. Progress on the beam separation optics is based on technical designs of electrostatic separator and special extraction quadripoles. The spent beam extraction is realized by a staged collimation scheme relying on realistic collimators. The impact on the detector background is estimated. The possibility of technical tests of the most challenging components is investigated.

FRXKI02 Magnet Development for LARP 3737
  • G. L. Sabbi
    LBNL, Berkeley, California
  The talk will cover progress and prospects for developing Nb3Sn quadrupoles for the eventual upgrade of the LHC IR's. The talk should also cover developments in cabling, but not R&D on the Nb3Sn strand.  
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