Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2003-12-09
Eur.Phys.J.C33:s1047-s1050,2004
Physics
High Energy Physics
High Energy Physics - Phenomenology
3 pages, 5 postscript figures, epj style, talk given at the EPS conference, Aachen, Germany, July 2003
Scientific paper
10.1140/epjcd/s2003-03-1504-1
The full exploitation of the physics potential of a future Linear Collider requires the development of polarised positron beams. A very promising scheme for the technical realisation is the use of helical undulators, generating circular polarised photons of several MeV which are then converted in a thin target to longitudinally polarised positrons. The experiment E-166 tests this scheme. It uses the low-emittance 50-GeV electron beam at the Final Focus Test Beam (FFTB) at SLAC, passing through a 1 meter-long helical undulator. The flux and polarisation of the undulator photons as well as the properties of the positrons will be measured and will be compared with simulations.
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