Sub-kelvin current amplifier using a DC-SQUID

Kimmo Kinnunen*, Antti Nuottajärvi, Sami Pöyhönen, Jukka Pekola, Arttu Luukanen, Heikki Sipilä, Ilkka Suni, Jorma Salmi, Heikki Seppä, Mikko Kiviranta

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

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
Volume284-288
Issue numberPart 2
DOIs
Publication statusPublished - Jul 2000
MoE publication typeA1 Journal article-refereed

Keywords

  • Amplifier
  • Cryogenic detectors
  • SQUID

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