Karlsruhe 2011 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 85: Strahldynamik, Simulation und Polarisation
T 85.1: Vortrag
Mittwoch, 30. März 2011, 16:45–17:00, 30.22: 022
ILC positron spin tracking simulation — •Valentyn Kovalenko1, Gudrid Moortgat-Pick1, Sabine Riemann2, Andreas Schaelicke2, and Andriy Ushakov2 — 1DESY, Notkestrasse 85, 23607 Hamburg, Germany — 2DESY, Platanenallee 6, 15738 Zeuthen, Germany
To achieve the physics goals of future Linear Colliders, it is important that electron and positron beams are polarised. The positron source planned for International Linear Collider (ILC) is based on a helical undulator system and can deliver a positron polarization of |Pe+|>=60%. To ensure that no significant polarization is lost during the transport of the e- and e+ beams from the source to the interaction region, spin tracking has to be included in all transport elements which can contribute to a loss of polarization, i.e. the initial accelerating structures, the damping rings, the spin rotators, the main linac and the beam delivery system. In particular, the dynamics of the polarized positron beam is required to be investigated. In the talk recent results of positron spin tracking simulation at the source are presented. The positron yield and polarization are discussed depending on the geometry of source elements.