Sub-kelvin current amplifier using a DC-SQUID

Research output: Contribution to journalArticle


  • Kimmo Kinnunen
  • Antti Nuottajärvi
  • Sami Pöyhönen
  • J.P. Pekola

  • Arttu Luukanen
  • Heikki Sipilä
  • Ilkka Suni
  • Jorma Salmi
  • Heikki Seppä
  • Mikko Kiviranta

Research units

  • University of Jyväskylä
  • Metorex International Oy
  • VTT Technical Research Centre of Finland


We have set up a system where a low-noise DC-SQUID is used as a current amplifier. The SQUID output is read using a wide band electronics unit based on the noise cancellation scheme. The SQUID has been installed in a compact Nanoway PDR50 dilution refrigerator, and superconducting transitions of Ti/Au thermometer strips for X-ray calorimeter applications have been measured. We can operate at 100 mK using a SQUID with Pd shunt resistors. Noise and bandwidth results of the setup are presented.


Original languageEnglish
Pages (from-to)2117-2118
Number of pages2
JournalPhysica B: Condensed Matter
Issue numberPart 2
Publication statusPublished - Jul 2000
MoE publication typeA1 Journal article-refereed

    Research areas

  • Amplifier, Cryogenic detectors, SQUID

ID: 4435535