Vorschau

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Abstract

The MOCCA detector is a 64x64-pixel molecule camera with an active area of 4.5 cm x 4.5 cm, developed for the energy-resolved detection of neutral molecule fragments at kinetic energies up to 300 keV at the Cryogenic Storage Ring (CSR) at the Max Planck Institute for Nuclear Physics, Heidelberg. Its principle is based on metallic magnetic calorimeters (MMCs): an energy deposition in the detector leads to an increase in temperature, resulting in a change in magnetization of a paramagnetic sensor, which can be measured with a SQUID. This thesis presents the detector design, the cleanroom processing and the developed cryogenic and electronic platform to operate the detector. To ensure a good thermalization over the complete detector, a process to produce gold-filled through-wafer vias was optimized and used. In characterization measurements, the full functionality of the readout system of MOCCA is presented. In measurements with 5.9 keV X-ray photons, an energy resolution of 88 eV is demonstrated. With the results obtained in this thesis, MOCCA fulfills all requirements for the challenging experiments planned at CSR, presently making it the largest and most complex operational MMC-type detector array.