| Paper |
Title |
Page |
| MOPLS069 |
Development of a Superconducting Helical Undulator for the ILC Positron Source
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706 |
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- Y. Ivanyushenkov, E. Baynham, T.W. Bradshaw, A.J. Brummitt, F.S. Carr, J. Rochford
CCLRC/RAL, Chilton, Didcot, Oxon
- I.R. Bailey, D.P. Barber, J.A. Clarke, J.B. Dainton, O.B. Malyshev, D.J. Scott, B.J.A. Shepherd
Cockcroft Institute, Warrington, Cheshire
- P. Cooke, L.I. Malysheva
Liverpool University, Science Faculty, Liverpool
- G.A. Moortgat-Pick
CERN, Geneva
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An undulator positron source has been recently selected by the International Linear Collider (ILC) community as a baseline. For the ILC a helical undulator capable of producing 10 MeV photons and with a period as close as possible to 10 mm is required. The HeliCal collaboration in the UK is looking at the merits of both permanent magnet and superconducting technologies for the design of a helical undulator. For the superconducting option, several prototypes have been built and tested. This paper details the design, construction and test results of the first superconducting prototypes.
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| THPLS126 |
Construction and Testing of a Pair of Focusing Undulators for ALPHA-X
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3580 |
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- B.J.A. Shepherd, J.A. Clarke
CCLRC/DL/ASTeC, Daresbury, Warrington, Cheshire
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ALPHA-X is a four-year project shared between several research groups in the UK to build a laser-plasma accelerator and produce coherent short-wavelength radiation in an FEL. A pair of undulators for the project have been designed and built by ASTeC at Daresbury Laboratory. The undulators are 1.5m long, 100 period permanent magnet devices with a minimum gap of 3.5mm, a peak field of 0.7T and a two-plane focusing design. The devices were modelled using RADIA, and data from the magnet block manufacturer was used to sort the blocks. To optimise the trajectory in the real devices, magnetic testing (using Hall probe and flipping coil techniques) and block swapping has been performed in Daresbury's dedicated insertion device test facility. The measurements agree well with the models, and the undulators will perform well within specification.
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