Paper |
Title |
Page |
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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