Paper |
Title |
Page |
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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MOPP008 |
Design of the Photon Collimators for the ILC Positron Helical Undulator
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565 |
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- A. Bungau
UMAN, Manchester
- I. R. Bailey, J. B. Dainton, K. M. Hock, L. J. Jenner, L. I. Malysheva
Liverpool University, Science Faculty, Liverpool
- E. Baynham, T. W. Bradshaw, F. S. Carr, J. Rochford
STFC/RAL/ASTeC, Chilton, Didcot, Oxon
- A. J. Brummitt, A. J. Lintern
STFC/RAL, Chilton, Didcot, Oxon
- J. A. Clarke, O. B. Malyshev, N. C. Ryder, D. J. Scott
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
- N. A. Collomb
STFC/DL, Daresbury, Warrington, Cheshire
- A. F. Hartin
OXFORDphysics, Oxford, Oxon
- S. Hesselbach, G. A. Moortgat-Pick
Durham University, Durham
- L. Zang
Cockcroft Institute, Warrington, Cheshire
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A number of photon collimators are placed inside the helical undulator to protect the cold surfaces of the vacuum vessel from being hit by the photons and thus achieving the baseline pressure requirement. Computer simulations were run in order to determine the energy deposition and instantaneous temperature rise in these collimators and various material candidates were studied. This paper presents the status of the simulation.
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MOPP024 |
Depolarization and Beam-beam Effects at the Linear Collider
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598 |
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- G. A. Moortgat-Pick, S. Hesselbach
Durham University, Durham
- I. R. Bailey, G. A. Moortgat-Pick, B. J.A. Shepherd
Cockcroft Institute, Warrington, Cheshire
- D. P. Barber
DESY, Hamburg
- E. Baynham, T. W. Bradshaw, F. S. Carr, J. Rochford
STFC/RAL/ASTeC, Chilton, Didcot, Oxon
- A. J. Brummitt, A. J. Lintern
STFC/RAL, Chilton, Didcot, Oxon
- A. Bungau
UMAN, Manchester
- J. A. Clarke, O. B. Malyshev, N. C. Ryder, D. J. Scott
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
- J. B. Dainton, K. M. Hock, L. J. Jenner, L. I. Malysheva, L. Zang
Liverpool University, Science Faculty, Liverpool
- A. F. Hartin
OXFORDphysics, Oxford, Oxon
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The clean environment at the interaction point of a lepton linear collider allows high-precision measurements for physics analyses. In order to exploit this potential, precise knowledge about the polarization state of the beams is also required. In this paper we concentrate on depolarization effects caused by the intense beam-beam interaction, which is expected to be the dominant source of depolarization. Higher-order effects, as well as critical analyses of the theoretical assumptions used in the past and theoretical improvements in the derivation of suitable equations, are given. Updates on existing simulation programs are reported. Numerical results for the design of the International Linear Collider (ILC) are discussed.
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MOPP070 |
Construction of a Full Scale Superconducting Undulator Module for the International Linear Collider Positron Source
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709 |
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- J. A. Clarke, O. B. Malyshev, D. J. Scott, B. J.A. Shepherd
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
- I. R. Bailey, J. B. Dainton, K. M. Hock, L. J. Jenner, L. I. Malysheva, L. Zang
Liverpool University, Science Faculty, Liverpool
- E. Baynham, T. W. Bradshaw, A. J. Brummitt, F. S. Carr, A. J. Lintern, J. Rochford
STFC/RAL, Chilton, Didcot, Oxon
- A. Bungau
UMAN, Manchester
- N. A. Collomb
STFC/DL, Daresbury, Warrington, Cheshire
- A. F. Hartin
OXFORDphysics, Oxford, Oxon
- S. Hesselbach, G. A. Moortgat-Pick
Durham University, Durham
- Y. Ivanyushenkov
ANL, Argonne, Illinois
- N. C. Ryder
University of Bristol, Bristol
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The positron source for the ILC is dependent upon a >200m long undulator to generate a high flux of multi-MeV photons. The undulator system is broken down into a series of 4m cryomodules, which each contain two superconducting helical undulators. Following a dedicated R&D phase and the construction and measurement of a number of short prototypes a full scale cryomodule has now been completed for the first time. This paper reports on the design, manufacture, and test results of this cryomodule.
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WEOBG03 |
The Design of the Positron Source for the International Linear Collider
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1915 |
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- J. A. Clarke, O. B. Malyshev, D. J. Scott
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
- I. R. Bailey, J. B. Dainton, K. M. Hock, L. J. Jenner, L. I. Malysheva, L. Zang
Liverpool University, Science Faculty, Liverpool
- E. Baynham, T. W. Bradshaw, A. J. Brummitt, F. S. Carr, A. J. Lintern, J. Rochford
STFC/RAL, Chilton, Didcot, Oxon
- V. Bharadwaj, J. Sheppard
SLAC, Menlo Park, California
- A. Bungau
UMAN, Manchester
- N. A. Collomb
STFC/DL, Daresbury, Warrington, Cheshire
- R. Dollan
Humboldt Universität zu Berlin, Berlin
- W. Gai, Y. Ivanyushenkov, W. Liu
ANL, Argonne, Illinois
- J. Gronberg, W. T. Piggott
LLNL, Livermore, California
- A. F. Hartin
OXFORDphysics, Oxford, Oxon
- S. Hesselbach, G. A. Moortgat-Pick
Durham University, Durham
- K. Laihem, S. Riemann, A. Schaelicke, A. Ushakov
DESY Zeuthen, Zeuthen
- T. Lohse
Humboldt University Berlin, Institut für Physik, Berlin
- A. A. Mikhailichenko
Cornell University, Department of Physics, Ithaca, New York
- N. C. Ryder
University of Bristol, Bristol
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The high luminosity requirements and the option of a polarized positron beam present a great challenge for the positron source of a future linear collider. This paper provides a comprehensive overview of the latest proposed design for the baseline positron source of the International Linear Collider. We report on recent progress and results concerning the main components of the source: including the undulator, collimators, capture optics, and target.
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Slides
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WEPP052 |
A Storage Ring Based Option for the LHeC
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2638 |
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- F. J. Willeke
BNL, Upton, New York
- F. Bordry, H.-H. Braun, O. S. Brüning, H. Burkhardt, J. M. Jowett, T. P.R. Linnecar, K. H. Mess, S. Myers, J. A. Osborne, F. Zimmermann
CERN, Geneva
- S. Chattopadhyay
Cockcroft Institute, Warrington, Cheshire
- J. B. Dainton, M. Klein
Liverpool University, Science Faculty, Liverpool
- B. J. Holzer
DESY, Hamburg
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The LHeC aims at the generation of Hadron-Lepton collisions with center of mass energies in the TeV scale and luminosities of the order of 1033 cm-2 sec-1 by taking advantage of the existing LHC 7 TeV proton ring and adding a high energy electron accelerator. This paper presents technical considerations and potential parameter choices for such a machine and outlines some of the challenges arising when an electron storage ring based option, constructed within the existing infrastructure of the LHC, is chosen.
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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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