Bonn 2010 – wissenschaftliches Programm
HK 31.8: Vortrag
Dienstag, 16. März 2010, 18:30–18:45, HG IX
A GEM-based TPC Test Chamber for PANDA — •Maxence Vandenbroucke — Technische Universität München E18, Garching, Germany
A GEM-based Time Projection Chamber (TPC) is a very promising option for the central tracker of PANDA, an internal target experiment at the High Energy Storage Ring (HESR) at the new Facility for Antiproton and Ion Research (FAIR) at Darmstadt. This detector has to provide good position and momentum resolution, and a low material budget. The continuous nature of the antiproton beam requires a suppression of ion backflow from the amplification stage to the drift volume, which can be realized e.g. by a Gas Electron Multiplier (GEM) stack. A test chamber of 77 mm drift length and a 10×10 cm2 active area read out with hexagonal pads has been build. This detector is connected to the AFTER-T2K front end electronics which shows noise performance of less than 800 e−. This detector has been installed on an electron test beam at the ELSA accelerator at Bonn. Making use of an external tracking telescope, the performance of the test TPC has been studied under various experimental conditions. Preliminary results will be presented in this talk.
This work is supported by the 6th Framework Program of the EU (Contracts No. RII3-CT-2004-506078, I3 Hadron Physics, and No. 515873-DS, DIRAC-secondary-Beams), the German Bundesministerium für Bildung und Forschung, the Maier-Leibnitz-Labor der LMU und TU München, and the DFG Cluster of Excellence ‘Origin and Structure of the Universe’.