Würzburg 2018 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 92: Neutrinophysik IV
T 92.8: Vortrag
Donnerstag, 22. März 2018, 18:25–18:40, Z6 - SR 2.012
Cryogenic Platform and readout for the ECHo experiment — Dorothea Fonnesu and •Arnulf Barth for the ECHo collaboration — Kirchhoff-Institut fuer Physik, Universitaet Heidelberg
The ECHo experiment is designed to investigate electron neutrino mass below 1 eV/c2 by analyzing the endpoint region of the calorimetrically measured 163Ho electron capture spectrum. Large arrays of low temperature metallic magnetic calorimeters with 163Ho enclosed in the particle absorber are used in ECHo. These detectors are operated well below 100 mK. To run the first phases of ECHo, a costumized dilution refrigerator has been equipped with cable for parallel and multiplexed readout.In this talk the commissioning of the cryogenic platform will be discussed with particular emphasis to the cabling concepts.
For the first phase of the ECHo experiment ECHO-1k, a 64-pixel parallel readout scheme has been optimized for the first measurement of high statistics spectra. We describe the design of the modules to host the chip with the detector array and the front-end SQUIDs as well as of the modules for SQUID-array amplification stage. Finally, we present the performance achieved in first characterization runs for the ECHo-1k experiment.