Dresden 2017 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 71: Superconductivity: Cryodetectors and Cryotechnique
TT 71.10: Vortrag
Donnerstag, 23. März 2017, 17:30–17:45, HSZ 201
SiM-X: The first step towards a large silicon microcalorimeter array — •Pascal Andree Scholz1, Victor Andrianov2, Artur Echler3,4, Peter Egelhof3,4, Oleg Kiselev3, Saskia Kraft-Bermuth1, and Damian Muell1 — 1Justus-Liebig-Universität, Giessen, Germany — 2Lomonosov Moscow State University, Moscow, Russia — 3GSI Helmholtz Center, Darmstadt, Germany — 4Johannes-Gutenberg Universität, Mainz, Germany
High-precision X-ray spectroscopy of highly-charged heavy ions provides a sensitive test of quantum electrodynamics in very strong Coulomb fields. Due to their excellent energy resolution for X-ray energies around 100 keV, silicon microcalorimeters, based on silicon thermistors and tin absorbers, have already demonstrated their potential to improve the precision in previous experiments at the Experimental Storage Ring (ESR) of the GSI Helmholtz Center for Heavy Ion Research. In june 2016 a new compact detector design along with a new cryogen-free cryostat equipped with a pulse tube cooler was applied in a test experiment at the ESR. This test was an important benchmark for designing a larger detector array with three times the active detector area, which is currently in preparation, and, thus, with an improved lateral sensitivity and statistical accuracy. In this presentation, we will introduce the ESR test experiment following results and discuss current developments and potential future applications.