Speaker
Prof.
Gudrid Moortgat-Pick
(University of Hamburg / DESY)
Description
High luminosity is required at future Linear Colliders
which is particularly challenging for all corresponding positron sources.
At the ILC, polarized positrons are obtained from electron-positron pairs by converting
high-energy photons produced by passing the high-energy main electron beam through a
helical undulator.
The conversion target undergoes cyclic stress with high peak values. To
distribute the high thermal load, the target is rotated with 100 m/s.
However, the cyclic stress
over long time as well as the temperature dependent material parameters yield thermo-
mechanical load which could exceed the recommended fatigue limit.
In the talk, a general overview about the ILC positron source components is given as well
as new results on the target stress
evolution. The target design parameters are reviewed as well.
Author
Prof.
Gudrid Moortgat-Pick
(University of Hamburg / DESY)
Co-authors
Dr
Andriy Ushakov
(University of hamburg)
Dr
Klaus Floettmann
(DESY)
Dr
Olufemi Segun Adeyemi
(University of Hamburg)
Dr
Sabine Riemann
(Deutsches Elektronen-Synchrotron (DE))
