• DocumentCode
    1475851
  • Title

    An HTS SQUID picovoltmeter with a flip-chip flux transformer

  • Author

    Blomgren, Jakob ; Eriksson, Thomas ; Winkler, Dag

  • Author_Institution
    Dept. of Microelectron. & Nanosci., Chalmers Univ. of Technol., Goteborg, Sweden
  • Volume
    11
  • Issue
    1
  • fYear
    2001
  • fDate
    3/1/2001 12:00:00 AM
  • Firstpage
    892
  • Lastpage
    895
  • Abstract
    An HTS SQUID picovoltmeter was constructed, which in two different configurations gave a voltage noise of en=3.2pV/√Hz and a current noise of in=310 pA/√Hz, and a voltage noise of en=75 pV/√Hz and a current noise of in=10 pA/√Hz, respectively. The low frequency noise was reduced to below 1 Hz using bias current reversal. The SQUID is coupled to the input coil via an intermediate flip-chip flux transformer. Measurements were performed to determine the input coil to SQUID mutual inductance for different input coil configurations
  • Keywords
    SQUIDs; flip-chip devices; high-temperature superconductors; superconducting device noise; superconducting transformers; voltmeters; HTS SQUID picovoltmeter; bias current reversal; current noise; flip-chip flux transformer; input coil; low-frequency noise; mutual inductance; voltage noise; Circuits; Coils; High temperature superconductors; Low-frequency noise; Magnetic noise; Resistors; SQUIDs; Superconducting device noise; Voltage; Voltmeters;
  • fLanguage
    English
  • Journal_Title
    Applied Superconductivity, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    1051-8223
  • Type

    jour

  • DOI
    10.1109/77.919488
  • Filename
    919488
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1475851