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HK: Fachverband Physik der Hadronen und Kerne

HK 15: Hadronenstruktur und -spektroskopie

HK 15.9: Vortrag

Dienstag, 20. März 2012, 18:45–19:00, P 1

First results of the Jülich-COSY Spin-Filtering experiment — •Dieter Oellers — Universita di Ferrara, Dipartimento di Fisica, 44122 Ferrara Italy — Institut für Kernphysik, Forschungszentrum Jülich, 52428 Jülich

The Polarized Antiproton EXperiments (PAX)-Collaboration proposes to polarize an antiproton beam. Spin dependent attenuation of a stored beam (spin-filtering) - proven to work with protons - is the only method which has the capability to also work for antiprotons.
The machine, the experimental setup and the detection system has been installed and commissioned at Jülich-COSY. In September 2011 a spin-filtering experiment at T = 49.3 MeV has been performed at Jülich-COSY with a stored proton beam.
With the achieved long beam lifetime of τ ≈ 8000 s and a polarized internal target with a density of d_t = 4.5· 10¹³/cm² the sensitivity of the detection system on the spin dependent cross section can be tested.
This talk will show a sketch of the experimental setup and focuses on the analysis. The sensitivity of the polarimeter and it’s systematic effects are discussed in detail.
Supported by ERC Advanced Grant "Polpbar".