• DocumentCode
    3731506
  • Title

    Development of Johnson Noise Thermometer Using Quantum Voltage Noise Source

  • Author

    C. Urano;Y. Okazaki;T. Yamada;K. Yamazawa;Y. Fukuyama;N. Kaneko;M. Maruyama;A. Domae;S. Yoshida;S. Kiryu;H. Yamamori;J. Tamba

  • Author_Institution
    Nat. Inst. of Adv. Ind. Sci. &
  • fYear
    2015
  • fDate
    7/1/2015 12:00:00 AM
  • Firstpage
    1
  • Lastpage
    4
  • Abstract
    In an effort to refine the value of the Boltzmann constant (k), we made thermodynamic temperature measurements of k using a Johnson noise thermometry (JNT) system, currently under development, using a quantum voltage noise source (QVNS). The JNT system measures the power spectrum density (PSD) of a sensor resistor using the PSD of a QVNS as a reference. k is then obtained using the Johnson-Nyquist equation. k obtained in our measurements to date has an offset of + (3.7±0.1)×10-5 from the CODATA value.
  • Keywords
    "Resistors","Temperature measurement","Voltage measurement","Electrical resistance measurement","Josephson junctions","Standards","Fitting"
  • Publisher
    ieee
  • Conference_Titel
    Superconductive Electronics Conference (ISEC), 2015 15th International
  • Type

    conf

  • DOI
    10.1109/ISEC.2015.7383450
  • Filename
    7383450
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=3731506