Dresden 2013 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 46: Instrumentation

HK 46.10: Vortrag

Dienstag, 5. März 2013, 19:00–19:15, WIL-A221

The precision high voltage system of the KATRIN-experiment — •Oliver Rest — Institut für Kernphysik, Westfälische Wilhelms-Universität Münster

The KATRIN- (KArlsruhe TRItium Neutrino-) experiment will measure the endpoint region of the tritium β decay spectrum to determine the mass of the ν_e. To achieve sub-eV sensitivity the energy of the decay electrons will be analyzed using a MAC-E type spectrometer. The retarding potential of the MAC-E-filter up to −30kV has to be monitored with a precision of 3ppm.
To fine-tune the shape of the electric field inside the main spectrometer 46 different voltages can be applied to the wire electrode system inside the main spectrometer. All these channels are controlled by the KATRIN high voltage slow control system. The potential will be measured directly via two high precision voltage dividers, which were developed in cooperation with the PTB (Physikalisch-Technische Bundesanstalt) Braunschweig.
This talk will give an overview of the HV system and show first results of functionality tests performed at KIT (Karlsruher Institut für Technologie).
This project is supported by BMBF under contract number 05A11PM2.