Mainz 2012 – wissenschaftliches Programm
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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 dt = 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".