Bonn 2010 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 65: Hadronenstruktur und -spektroskopie XI

HK 65.7: Talk

Friday, March 19, 2010, 15:45–16:00, HG IV

Towards Polarised Antiprotons — •Christian Weidemann — Institut für Kernphysik (IKP), FZ-Jülich — JCHP, FZ-Jülich

The spin-filtering experiments at COSY and AD-CERN within the framework of the Polarised Antiproton EXperiments (PAX) want to achieve a polarisation build-up of an initially unpolarized stored proton (antiproton) beam by multiple passage through an internal polarised gas target. For a quantitative understanding of the polarisation buildup and commissioning of the experimental setup spin-filtering will first be done with protons at COSY, before repeating the measurement with antiprotons at the AD.
A first major step towards this goal has been achieved at COSY with the installation of the required mini-β section in summer 2009, which will be comissioned in early 2010. The target chamber together with the atomic beam source (ABS), the Breit-Rabi-Polarimeter, and the detection system, which is based on silicon microstrip detectors, will be installed and commissioned in summer 2010.
The talk outlines the status and the anticipated plan of PAX at COSY and AD.