Bochum 2009 – scientific programme

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HK: Fachverband Hadronen und Kerne

HK 62: Accelerators and Instrumentation I

HK 62.7: Talk

Wednesday, March 18, 2009, 18:30–18:45, H-ZO 80

Detector system for spin-filtering experiments — •Christian Weidemann — Institut für Kernphysik (IKP) and Jülich Center for Hadron Physics (JCHP), Forschungszentrum Jülich

The spin-filtering experiments at COSY and AD-CERN within the framework of the Polarized Antiproton EXperiments (PAX) want to clarify the polarization build-up of an initially unpolarized stored proton (antiproton) beam by multiple passage through a polarized gas target.

One necessity is the determination of the polarizations of beam and target. While the target polarization could be determined with a Breit-Rabi Polarimeter, a system for beam polarization measurements based on the silicon recoil detectors of the HERMES-Experiment is under development. 8 modules from HERMES together with 8 already ordered PAX TTT silicon microstrip detectors from Micron Technology will form the PAX detector system for spin-filtering experiments. One module (Demetrius) consisting of 2 double-sided detectors with an active area of 97,3 mm× 97,3 mm and 128+128 strips has been equipped with new UHV-compatible readout electronics. Further preparations for detector tests including a specially designed coolable support and a test bench were finished.

The status of the detector system for spin-filtering experiments and the results of first detector tests will be presented.