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Nanokelvin DC and AC Meissner-transition-edge temperature detectors.
Woods, S I; Carter, A C; Jung, T M; Defibaugh, D R.
Afiliação
  • Woods SI; Sensor Science Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA.
  • Carter AC; Jung Research and Development Corp., Bethesda, Maryland 20816, USA.
  • Jung TM; Jung Research and Development Corp., Bethesda, Maryland 20816, USA.
  • Defibaugh DR; Sensor Science Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA.
Rev Sci Instrum ; 90(2): 024901, 2019 Feb.
Article em En | MEDLINE | ID: mdl-30831742
Based upon a superconducting transition edge sensor (TES), the Meissner-TES is a relatively new type of high resolution cryogenic thermometer which employs the magnetic transition of a superconductor to measure temperature. We have improved the signal-to-noise for DC sensing by a factor of 30 compared to our prior effort and developed a new AC mode which uses an oscillating magnetic field and a lock-in technique with much lower magnetic noise than the DC mode. The thermometer was tuned in situ over a range of operating temperatures 10-50 times larger than the transition width of the superconductor, using an applied persistent magnetic field. The DC mode can have sensitivity better than 1 nK for 100 s averaging, and the AC mode has sensitivity better than 120 nK for very small applied magnetic fields near 14 nT and 100 s averaging. The Meissner-TES can be applied to high resolution temperature control, high sensitivity infrared sensing, optical power scale realization, and the study of temperature-dependent phase transitions.

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Rev Sci Instrum Ano de publicação: 2019 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Rev Sci Instrum Ano de publicação: 2019 Tipo de documento: Article