Journal of Low Temperature Physics

, Volume 151, Issue 1, pp 436–442

Properties of Superconducting Rhenium as an Absorber for Magnetic Calorimeters

  • J.-P. Porst
  • C. Höhn
  • D. Haug
  • R. Weldle
  • G. M. Seidel
  • L. Gastaldo
  • A. Fleischmann
  • C. Enss
Article

DOI: 10.1007/s10909-007-9665-6

Cite this article as:
Porst, JP., Höhn, C., Haug, D. et al. J Low Temp Phys (2008) 151: 436. doi:10.1007/s10909-007-9665-6

Abstract

A still puzzling problem in the development of low temperature micro-calorimeters for the measurement of the 187rhenium β-spectrum is the understanding of the thermalization of energetic electrons in the superconducting rhenium absorber. We studied metallic magnetic calorimeters (MMC) with single crystal rhenium absorbers and paramagnetic Au:Er temperature sensors. The energy released into the detector leads to a change of magnetization of the paramagnetic sensor located in a weak magnetic field. A SQUID with meander shaped inductance is used to read out this change. This setup allows the study of several properties of the superconducting absorber. The transition to the superconducting state is studied by measuring the magnetic flux expelled by the rhenium sample. The resistivity of rhenium above Tc can be estimated from the measurement of the spectral power density of the Johnson noise. Furthermore the quasiparticle lifetime can be investigated through the analysis of the shape of detector signals caused by intrinsic β-decays and the absorption of X-rays. We present the data obtained in these experiments and discuss the physical quantities which can be derived from these.

Keywords

Micro-calorimeters Superconductors MMC Low temperature Particle detectors 

PACS

07.85.Nc 74.25.Bt 74.62.Dh 85.25.Dq 

Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • J.-P. Porst
    • 1
  • C. Höhn
    • 1
  • D. Haug
    • 1
  • R. Weldle
    • 1
  • G. M. Seidel
    • 2
  • L. Gastaldo
    • 1
  • A. Fleischmann
    • 1
  • C. Enss
    • 1
  1. 1.Kirchhoff-Institut für PhysikUniversität HeidelbergHeidelbergGermany
  2. 2.Department of PhysicsBrown UniversityProvidenceUSA