Gießen 2007 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 22: Instrumentation und Anwendungen

HK 22.5: Talk

Tuesday, March 13, 2007, 18:00–18:15, B

Cooling system of the ANKE Silicon Tracking Telescopes — •Alexander Klingler, Ralf Schleichert, and Hans Ströher — Institut für Kernphysik 2, Forschungszentrum Jülich, Deutschland

Hadron physics uses deuterium as a neutron target, which requires detection of slow protons. For these spectator protons as well as for vertex reconstruction a Silicon Tracking Telescope will be used as a separate detector system close to the beam-target interaction point of the ANKE spectrometer at COSY. A stable drift time of the charge carriers in the silicon and a temperature stabilisation of the ampifiers are needed for an energy measurement with a precision of the order of 1%. In this presentation, the realisation of the cooling system, including construction, tuning and operation will be presented. In particular, the determination of the silicon temperature, which has a strong impact on the drift velocity, and the resulting regulation system will be discribed. We discuss the results obtained from our first two beam times at ANKE.