Heidelberg 2015 – wissenschaftliches Programm
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MS: Fachverband Massenspektrometrie
MS 10: Accelerator Mass Spectrometry and Applications 2
MS 10.3: Vortrag
Mittwoch, 25. März 2015, 17:45–18:00, PH/HS2
A new Time of Flight system at the Cologne FN-Tandem accelerator — •P. Bhandari, A. Dewald, C. Müller-Gatermann, S. Heinze, C. Feuerstein, M. Schiffer, A. Stolz, and R. Altenkirch — Institute for Nuclear Physics, University of Cologne
A new time of flight (TOF) system has been set up and will be installed at the FN-Tandem accelerator facility at Institute for Nuclear Physics, University of Cologne. It is compatible with the existing TOF system at CologneAMS. The new system is optimized for timing resolution. We selected the chevron microchannel plate detector(F4655-13), from Hamamatsu with a rise time of around 290 ps, small channel diameter (4 µm) and the active area diameter of 14.5 mm. The detector system is based upon the triangular foil-mirror-MCP design[1]. In this geometry, secondary electrons emitted from the carbon foil (20µ g/cm2) are deflected by 90∘ with respect to the beam direction towards the MCP by an electrostatic mirror consisting of the two tungsten meshes of 0.001" diameter 92% open area ratio). The signals of two identical detectors were used as start and stop for timing measurements. The preliminary results will be presented.
[1] S. Heinze et.al, A new beam profile monitor and time of flight system for CologneAMS, Nucl. Inst. Meth. B 294 (2013) 410.