München 2006 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 38: Instrumentation und Anwendungen

HK 38.8: Vortrag

Mittwoch, 22. März 2006, 18:15–18:30, H

Track reconstruction in the ATRAP-II experiment — •Z. Zhang, F. Goldenbaum, D. Grzonka, W. Oelert, and T. Sefzick — Institut für Kernphysik, Forschungszentrum Jülich, D-52425 Jülich

The ATRAP experiment at the CERN antiproton decelerator AD aims for a test of the CPT invariance by a high precision comparison of the 1s-2s transition between the hydrogen and the antihydrogen atom. The experimental studies are performed at two separate installations, ATRAP-I, a system with severe space limitation, where routinely antihydrogen was produced and ATRAP-II, which will start full operation within the next AD running period. ATRAP-II includes a much larger solenoid allowing the installation of an extended detection system as well as an optimized combined magnetic/Penning trap. The antihydrogen annihilation detector system consists of 10 layers of scintillating fibres and determines the annihilation vertex of the antiprotons. This diagnostic element will allow to optimize the production of cold antihydrogen. Extensive Monte Carlo simulations concerning the track reconstruction have been performed using the GEANT4 simulation toolkit. Results on track fitting and vertex reconstruction will be described.

* Supported in part by the BMBF and FZ-Jülich