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TT: Fachverband Tiefe Temperaturen

TT 36: Superconductivity: Cryodetectors

TT 36.7: Vortrag

Donnerstag, 29. März 2012, 11:15–11:30, H 2053

Metallic Magnetic Calorimeters for High-Resolution X-ray Spectroscopy in Atomic Physics — •S. Schäfer, C. Pies, S. Kempf, J.-P. P, S. Uhl, S. Heuser, T. Wolf, L. Gastaldo, A. Fleischmann, and C. Enss — Kirchhoff Institut für Physik, INF 227, 69120 Heidelberg

Highly-charged heavy ions are model systems for the investigation of quantum electrodynamical effects in strong electromagnetic fields.

We are developing x-ray detectors based on 1x8 arrays of Metallic Magnetic Calorimeters (MMCs) optimized for the spectroscopy of highly-charged ions at GSI/FAIR and the EBIT facility at the MPI for nuclear Physics in Heidelberg. One of the detector arrays (maXs-20) is designed to provide an energy resolution below 3 eV (FWHM) and sufficient stopping power for x-rays in the energy range up to 20 keV. The second device (maXs-200) is optimized for the detection of x-rays up to 200 keV and should yield an energy resolution below 30 eV (FWHM).

We present detector designs, outline the micro-fabrication process and discuss the results of characterization measurements with ⁵⁵Fe and ²⁴¹Am calibration sources including energy resolution, signal rise time and cross-talk between adjacent detectors of both arrays.