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HK: Fachverband Hadronen und Kerne
HK 52: Accelerators and Instrumentation I
HK 52.7: Vortrag
Mittwoch, 18. März 2009, 15:45–16:00, H-ZO 80
Commissioning of the Vacuum Straw Tracker for the COSY-TOF Spectrometer — •Matthias Röder, James Ritman, Pierre Voigtländer, and Peter Wintz — Institut für Kernphysik I, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
The Straw-Tracker at COSY-TOF is a system of 3120 Straws arranged in 30 layers. These are operated at 1.2 bar driftgas pressure in the TOF vacuum so that they are self-supporting, despite their mylar wrapping being only 30 µm thick. As a result the total radiation length amounts to only 1 %. The operation with 1500 V anode voltage in medium vacuum at ≈ 5·10−3 mbar imposes stringent demands on detector design and handling.
In this talk the system is introduced and it is reported on the commissioning during the year 2008. The emphasis is placed on vacuum operation and results on the efficiency and resolution under experiment conditions.
Supported by BMBF and FZ-Jülich.