Performance of resistive microcalorimeters and bolometers

Research output: Chapter in Book/Report/Conference proceedingConference contribution


In recent years microcalorimeters and bolometers have achieved impressive performance in terms of energy resolution or Noise Equivalent Power (NEP). However their performance is still significantly worse than predicted by ideal models. The difference is due primarily to non-ideal effects that have to be taken into account and to additional noise of unknown origin. The most significant non-ideal effects have been quantified and include hot-electron and absorber decoupling and the related extra noise sources, and non-ohmic behavior of the thermometer. Excess noise of unknown origin is particularly significant when Transition Edge Sensors (TES) detectors are used as thermometers and is currently under experimental and theoretical investigation. This paper reviews the origin of non-ideal effects in microcalorimeters and bolometers and their effect on energy resolution and NEP. It also reviews the status of theoretical and experimental results on the characterization of the excess noise in TES, and in particular its relation to fundamental physics in superconductors near the transition temperature.

Original languageEnglish (US)
Title of host publicationLOW TEMPERATURE PHYSICS
Subtitle of host publication24th International Conference on Low Temperature Physics - LT24
Number of pages4
StatePublished - 2006
EventLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24 - Orlando, FL, United States
Duration: Aug 10 2006Oct 17 2006

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


OtherLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24
Country/TerritoryUnited States
CityOrlando, FL


  • Bolometers
  • Excess noise
  • Microcalorimeters
  • TES

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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