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WEOAG01 |
Prospects for a Large Hadron Electron Collider (LHeC) at the LHC
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1903 |
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- M. Klein
Liverpool University, Science Faculty, Liverpool
- H. Aksakal
N. U, Nigde
- F. Bordry, H.-H. Braun, O. S. Brüning, H. Burkhardt, R. Garoby, J. M. Jowett, T. P.R. Linnecar, K. H. Mess, J. A. Osborne, L. Rinolfi, D. Schulte, R. Tomas, J. Tuckmantel, F. Zimmermann, A. de Roeck
CERN, Geneva
- S. Chattopadhyay, J. B. Dainton
Cockcroft Institute, Warrington, Cheshire
- A. K. Ciftci
Ankara University, Faculty of Sciences, Tandogan/Ankara
- A. Eide
EPFL, Lausanne
- B. J. Holzer
DESY, Hamburg
- P. Newman
Birmingham University, Birmingham
- E. Perez
CEA, Gif-sur-Yvette
- S. Sultansoy
TOBB ETU, Ankara
- A. Vivoli
LAL, Orsay
- F. J. Willeke
BNL, Upton, New York
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The LHeC collides a lepton beam with one of the intense, LHC, hadron beams. It achieves both e± interactions with quarks at the terascale, at eq masses in excess of 1 TeV, with a luminosity of about 1033 cm-2 s-1, and it also enables a sub-femtoscopic probe of hadronic matter at unprecedented chromodynamic energy density, at Bjorken-x values down to 10-6 in the deep inelastic scattering domain. The LHeC combines the LHC infrastructure with recent advances in radio-frequency, in linear acceleration and in other associated technologies, to enable two proposals for TeV ep collisions: a "ring-ring" option in which 7 TeV protons (and ions) collide with about 70 GeV electrons/positrons in a storage ring in the LHC tunnel and a "linac-ring" option based on an independent superconducting linear accelerator enabling single-pass collisions of electrons and positrons of up to about 140 GeV with an LHC hadron beam. Both options will be presented and compared. Steps are outlined for completing a Conceptual Design Review of the accelerator complex, beam delivery, luminosity, physics and implications for experiment, following declared support by ECFA and by CERN for a CDR.
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Slides
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WEPP154 |
Linac-LHC ep Collider Options
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2847 |
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- F. Zimmermann, F. Bordry, H.-H. Braun, O. S. Brüning, H. Burkhardt, R. Garoby, T. P.R. Linnecar, K. H. Mess, J. A. Osborne, L. Rinolfi, D. Schulte, R. Tomas, J. Tuckmantel, A. de Roeck
CERN, Geneva
- H. Aksakal
N. U, Nigde
- S. Chattopadhyay
Cockcroft Institute, Warrington, Cheshire
- A. K. Ciftci
Ankara University, Faculty of Sciences, Tandogan/Ankara
- J. B. Dainton
Liverpool University, Science Faculty, Liverpool
- A. Eide
EPFL, Lausanne
- B. J. Holzer
DESY, Hamburg
- M. Klein
University of Liverpool, Liverpool
- S. Sultansoy
TOBB ETU, Ankara
- A. Vivoli
LAL, Orsay
- F. J. Willeke
BNL, Upton, New York
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We describe various parameter scenarios for a ring-linac ep collider based on LHC and an independent s.c. electron linac. Luminosities of order 1032/cm2/s can be achieved with a standard ILC-like linac, operated either in pulsed or cw mode, with acceptable beam power. Reaching much higher luminosities, up to 1034/cm2/s and beyond, would require the use of two linacs and the implementation of energy recovery. Advantages and challenges of a ring-linac ep collider vis-a-vis an alternative ring-ring collider are discussed.
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FRYAGM01 |
Upgrade Issues for the CERN Accelerator Complex
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3734 |
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The Large Hadron Collider at CERN is at a very advanced stage of construction and the first beam collisions in the experiments are expected during the year 2008. Work has now started for maximizing its physics reach and for preparing for other foreseeable needs. Beyond upgrades in the LHC itself, mainly in the optics of the insertions, the injector complex has to be renewed to deliver beam with upgraded characteristics with a high reliability. In a first phase, a new 160 MeV H- linac (Linac4) will be built to replace the present 50 MeV proton linac (Linac2) and extensive consolidation will be made. In a second phase, the present 26 GeV PS and its set of injectors (Linac2 + PSB) are planned to be replaced with a ~50 GeV synchrotron (PS2) using a 4 GeV superconducting proton linac (SPL) as injector. The SPS itself will also be the subject of major improvements, to be able to cope with a 50 GeV injection energy and with beams of much higher brightness. These proposals are described as well as their potential to evolve and fit the needs of future facilities for radioactive ions and/or neutrinos.
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Slides
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