Prototype for an Undulator-based Source for Polarised Positrons: International Polarised Positron Collaboration: Project E-166

摘要

The full exploitation of the physics potential of a future Linear Colliderrequires the development of polarised positron beams. A very promising schemefor the technical realisation is the use of helical undulators, generatingcircular polarised photons of several MeV which are then converted in a thintarget to longitudinally polarised positrons. The experiment E-166 tests thisscheme. It uses the low-emittance 50-GeV electron beam at the Final Focus TestBeam (FFTB) at SLAC, passing through a 1 meter-long helical undulator. The fluxand polarisation of the undulator photons as well as the properties of thepositrons will be measured and will be compared with simulations.