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Peggs, S.

Paper Title Page
TUOAMH03 Channeling and Volume Reflection Based Crystal Collimation of the Tevatron Circulating Beam Halo (T980) 1243
 
  • V.D. Shiltsev, G. Annala, R.A. Carrigan, A.I. Drozhdin, T.R. Johnson, A.M. Legan, N.V. Mokhov, R.E. Reilly, D.A. Still, R. Tesarek, J.R. Zagel
    Fermilab, Batavia
  • R.W. Assmann, V.P. Previtali, W. Scandale
    CERN, Geneva
  • Y.A. Chesnokov, I.A. Yazynin
    IHEP Protvino, Protvino, Moscow Region
  • V. Guidi
    INFN-Ferrara, Ferrara
  • Yu.M. Ivanov
    PNPI, Gatchina, Leningrad District
  • S. Peggs
    BNL, Upton, Long Island, New York
 
 

The T980 crystal collimation experiment is underway at the Tevatron to study various crystal types and parameters and evaluate if this technique would increase TeV beam-halo collimation efficiency at high-energy hadron colliders such as the Tevatron and the LHC. The setup has been substantially enhanced during the Summer 2009 shutdown by installing a new O-shaped crystal in the horizontal goniometer, adding a vertical goniometer with two alternating crystals (O-shaped and multi-strip) and additional beam diagnostics. First measurements with the new system are quite encouraging, with channeled and volume-reflected beams observed on the secondary collimators as predicted. Investigation of crystal collimation efficiencies with crystals in volume reflection and channeling modes are described in comparison with an amorphous primary collimator. Results on the system performance are presented for the end-of-store studies and for entire collider stores. Planning is underway for dedicated studies during a Tevatron post-collider physics running period.

 

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Slides

 
MOPD053 Conceptual Design of the ESS LINAC 804
 
  • M. Eshraqi, M. Brandin, I. Bustinduy, C.J. Carlile, H. Hahn, M. Lindroos, C. Oyon, S. Peggs, A. Ponton, K. Rathsman
    ESS, Lund
  • R. Calaga, T. Satogata
    BNL, Upton, Long Island, New York
  • A. Jansson
    Fermilab, Batavia
 
 

A three year design update for the European Spallation Source (ESS) linac is just starting and a full review of this work will be presented. The acceleration in the medium energy part of the LINAC using the spoke cavities have been optimized and the rest of the machine has been redesigned to incorporate this optimization. The ESS LINAC will deliver an average power of 5~MW to the target in the nominal design and the possibility to upgrade to 7.5~MW has been included in all the design steps.


Acknowledgments to all the people in the ESS LINAC Reference Group.