Investigations on a Reliable Positron Source for ILC and CLIC with the Hybrid Target
Résumé
Choosing a hybrid e+ source using channeling already meets the requirements of the ILC and CLIC. Replacing the compact converter with a granular one made of small spheres improves the heat dissipation, decreases the PEDD and provides better resistance to the shocks. Simulations of the temperature distribution of the W spheres and evaluations of the granular converter thermal shocks are ongoing. Cooling system using rotating wheel is under study. Upcoming experimental activities foreseen at KEK are very important for the hybrid targets studies in general and for the future unpolarised e+ source of the future LCs in particular.