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- D.J. Scott, S.C. Appleton, J.A. Clarke, B. Todd
CCLRC/DL/ASTeC, Daresbury, Warrington, Cheshire
- E. Baynham, T.W. Bradshaw, S.C. Carr, Y. Ivanyushenkov, J. Rochford
CCLRC/RAL/ASTeC, Chilton, Didcot, Oxon
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An efficient and simple method for the production of positrons, in the necessary quantities, is one of the problems facing proposals for any future e+ e- Linear Collider project. The possibility of colliding polarised beams would also be an advantage. One method to produce a polarised positron beam uses circularly polarised radiation generated by the main electron beam passing through a helical undulator. Design considerations and calculations for two undulators, based on super-conducting and pure permanent magnet technologies, for the TESLA machine, are presented.
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