A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z  

Clarke, J. A.

Paper Title Page
THPMN070 Development of a Full Scale Superconducting Undulator Module for the ILC Positron Source 2862
 
  • Y. Ivanyushenkov, E. Baynham, T. W. Bradshaw, A. J. Brummitt, F. S. Carr, A. J. Lintern, J. Rochford
    STFC/RAL, Chilton, Didcot, Oxon
  • I. R. Bailey, J. A. Clarke, J. B. Dainton, O. B. Malyshev, L. I. Malysheva, G. A. Moortgat-Pick, D. J. Scott
    Cockcroft Institute, Warrington, Cheshire
  • D. P. Barber
    DESY, Hamburg
  • P. Cooke
    Liverpool University, Science Faculty, Liverpool
  • B. J.A. Shepherd
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
 
  Funding: This work is supported in part by the Commission of the European Communities under the 6th Framework Programme "Structuring the European Research Area", contract number RIDS-011899.

An undulator based positron source is a baseline for the International Linear Collider (ILC). The HeliCal collaboration in the UK is working on the development of a full scale 4-m long undulator module. Several prototypes have been built and tested in the R&D phase of the programme that culminated in the development of manufacturing techniques suitable for construction of the first full scale undulator sections. This paper details the design and the construction status of 4-m long undulator module.

 
THPMN071 Status of R&D on a Superconducting Helical Undulator for the ILC Positron Source 2865
 
  • Y. Ivanyushenkov, E. Baynham, T. W. Bradshaw, A. J. Brummitt, F. S. Carr, A. J. Lintern, J. Rochford
    STFC/RAL, Chilton, Didcot, Oxon
  • I. R. Bailey, J. A. Clarke, J. B. Dainton, O. B. Malyshev, L. I. Malysheva, G. A. Moortgat-Pick, D. J. Scott
    Cockcroft Institute, Warrington, Cheshire
  • D. P. Barber
    DESY, Hamburg
  • P. Cooke
    Liverpool University, Science Faculty, Liverpool
  • B. J.A. Shepherd
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
 
  Funding: This work is supported in part by the Commission of the European Communities under the 6th Framework Programme "Structuring the European Research Area", contract number RIDS-011899.

An undulator based positron source is a baseline for the International Linear Collider (ILC). The HeliCal collaboration in the UK is carrying out an R&D programme on a short period supercoducting helical undulator with the goal to develop manufacturing technique as well as modelling and measurement techniques. Several undulator prototypes have been built and successfully tested. This paper summarizes the results of the R&D phase of the project.

 
THPMN083 Spin Tracking at the International Linear Collider 2901
 
  • I. R. Bailey, I. R. Bailey, J. A. Clarke, J. B. Dainton, L. J. Jenner, O. B. Malyshev, L. I. Malysheva, G. A. Moortgat-Pick, D. J. Scott
    Cockcroft Institute, Warrington, Cheshire
  • D. P. Barber
    DESY, Hamburg
  • E. Baynham, T. W. Bradshaw, F. S. Carr, Y. Ivanyushenkov, J. Rochford
    STFC/RAL/ASTeC, Chilton, Didcot, Oxon
  • A. Birch
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
  • A. J. Brummitt, A. J. Lintern
    STFC/RAL, Chilton, Didcot, Oxon
  • P. Cooke, L. Zang
    Liverpool University, Science Faculty, Liverpool
  • A. F. Hartin
    OXFORDphysics, Oxford, Oxon
 
  Funding: This work is supported in part by the Commission of the European Communities under the 6th Framework Programme "Structuring the European Research Area", contract number RIDS-011899.

Polarized electron and positron beams are foreseen for the future International Linear Collider (ILC), with polarized electrons already included in the baseline design and polarized positrons seen as a highly-desirable upgrade. High precision physics requires the polarization of both beams to be known with a relative uncertainty of approximately 0.5% or better. Therefore all possible depolarization effects that could operate between the polarized sources and the interaction regions have to be carefully modelled. The "heLiCal" collaboration aims to provide a full "cradle-to-grave" analysis of all depolarization effects at the ILC, and to develop software tools to carry out appropriate computer simulations. In this paper we report on the first phase of our work which includes extensive simulations of the ILC spin-dynamics and a detailed study of beam-beam depolarization effects at the interaction point(s).

 
THPMN074 The Status of the HeLiCal Contribution to the Polarised Positron Source for the International Linear Collider 2874
 
  • D. J. Scott, A. Birch, J. A. Clarke, O. B. Malyshev
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
  • I. R. Bailey, D. P. Barber, J. B. Dainton, L. J. Jenner
    Cockcroft Institute, Warrington, Cheshire
  • E. Baynham, T. W. Bradshaw, A. J. Brummitt, F. S. Carr, Y. Ivanyushenkov, A. J. Lintern, J. Rochford
    STFC/RAL, Chilton, Didcot, Oxon
  • L. I. Malysheva
    Liverpool University, Science Faculty, Liverpool
  • G. A. Moortgat-Pick
    Durham University, Durham
 
  The positron source for the International Linear Collider is a helical undulator-based design, which can generate unprecedented quantities of polarised positrons. The HeLiCal collaboration takes responsibility for the design and prototyping of the superconducting helical undulator, which is a highly demanding short period device with very small aperture, and also leads the start to end simulations of the polarised electrons and positrons to ensure that the high polarisation levels generated survive from the source up to the collision point. This paper will provide an update on the work of the collaboration, focusing on these two topic areas, and will also discuss future plans.  
FRXKI01 Superconducting Magnet Needs for the ILC 3732
 
  • J. C. Tompkins, V. S. Kashikhin
    Fermilab, Batavia, Illinois
  • J. A. Clarke
    Cockcroft Institute, Warrington, Cheshire
  • M. A. Palmer
    CLASSE, Ithaca
  • B. Parker
    BNL, Upton, Long Island, New York
 
  The ILC Reference Design Report will be completed early in 2007. The Magnet Systems Group was formed to translate magnetic field requirements into magnet designs and cost estimates for the Reference Design. As presently configured, the ILC will have more than 11,000 magnetic elements of which more than 1200 will be based on superconducting technology. This paper will describe the major superconducting magnet needs for the ILC as presently determined by the Magnet Systems Group and the leaders of the Area Systems Groups, responsible for beamline design. The superconducting magnet components include the Main Linac quadrupoles, the Positron Source undulators, the Damping Ring wigglers, and the complex array of Final Focus superconducting elements in the Beam Delivery System.  
slides icon Slides