12-13 February 2014
Europe/Berlin timezone

Heat load and stress studies of the collimator materials for the polarized ILC positron source

13 Feb 2014, 14:00


Institut für Kernphysik; Johannes Gutenberg-Universität Mainz; Johann-Joachim-Becher-Weg 45; D 55128 Mainz


Dr Friedrich Staufenbiel (DESY Zeuthen)


An intense polarized positron beam for future linear colliders can be produced using a high power beam of circularly polarized photons which penetrates a thin titanium-alloy target. The degree of polarization can be increased by cutting the outer part of the photon beam generated in a helical undulator using a collimator in front of the target. However, the photon beam induces substantial heat load and stress inside the collimator materials. In order to avoid failure of the collimator components the heat and stress evolution has been simulated. The results as well as the corresponding material arrangements for the photon collimator design are presented.

Primary author

Dr Friedrich Staufenbiel (DESY Zeuthen)


Andriy Ushakov (University of Hamburg) Sabine Riemann (DESY)

Presentation Materials