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TT: Fachverband Tiefe Temperaturen

TT 103: Superconductivity: Cryogenic Particle Detectors

TT 103.1: Hauptvortrag

Donnerstag, 15. März 2018, 17:15–17:45, H 2053

From Fundamental Principles to Applications: Cryogenic Micro-Calorimeters — •Christian Enss, Sebastian Kempf, Loredana Gastaldo, and Andreas Fleischmann — Kirchhoff-Institut für Physik, Universität Heidelberg, INF 227, 69120 Heidelberg

Magnetic micro-calorimeters (MMCs) are state of the art cryogenic particle detectors which belong to the most sensitive devices to measure the energy of single quanta. They are composed of an absorber suited for the particles to be detected which is in close thermal contact with a paramagnetic temperature sensor. Together the two are coupled to a thermal bath through a weak thermal link. Fundamentally the energy resolution of such a detector is limited by thermal fluctuations between the absorber/sensor system and the thermal bath. Their universal applicability for particles and radiation as well as their high resolving power, broad bandwidth and linear response make them today a popular choice in many different experiments. Applications include X-ray spectroscopy, neutrino physics, material analysis, mass spectrometry and nuclear forensic. Currently, MMCs are used in several international projects like AMoRE, ECHo and SPARC. We will discuss the operating principle, the basic material science research behind their realization, the status of development and various recent applications.