Berlin 2012 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 33: Superconductivity, Measuring Devices, Matter at Low Temperature: Poster Session

TT 33.68: Poster

Wednesday, March 28, 2012, 15:00–19:00, Poster B

Study of the Energy Thermalisation in Superconducting Absorbers by Means of Low Temperature Magnetic Calorimeters — •Daniel Hengstler, Philipp C.-O. Ranitzsch, Jan-Patrick Porst, Loredana Gastaldo, Andreas Fleischmann, and Christian Enss — Kirchhoff Institute for Physics, Heidelberg University INF 227, 69120 Heidelberg, Germany

The use of superconducting particle absorbers for low temperature micro-calorimeters promises several advantages like the possibility to combine high stopping power with low heat capacity. Due to the still not well understood thermalization of the energy released by the interacting particle, superconducting absorbers are used only in special cases. We investigated by means of metallic magnetic calorimeters the temperature response of the paramagnetic sensor following the absorption of an x-ray in a superconducting absorber. We analyzed the pulse shape as function of temperature for different absorber materials: rhenium, aluminum and aluminum doped with 600ppm manganese, zinc and zinc doped with 24ppm Mn. The doping with manganese was performed in order to understand the role of magnetic impurities in the thermalization of energy. We discuss the temperature dependence of the energy thermalization in superconducting absorbers at the light of presently available theories.