Experimental study of noise characteristics of large-β dc SQUID with resistively shunted inductance

Satoshi Kohjiro, Keiji Enpuku, Keiji Yoshida, Kaoru Yamafuji

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Noise characteristics of dc SQUIDs in large β regimes have been studied experimentally in the case when a SQUID inductance is resistively shunted. Here, β=2LI00 is the modulation parameter, L is the SQUID inductance, I0 is the critical current of the Josephson junction and Φ0 is the flux quantum. It is shown experimentally that the performance of the SQUID does not degrade significantly even for large β values; for example, the minimum energy resolution of the SQUID is as small as ε=25h and the flux region where ε<50h is as wide as 0.1Φ0, even for the case β=12, where h is the Planck constant. The experimental results agree quantitatively with the theoretical ones.

Original languageEnglish
Pages (from-to)1871-1874
Number of pages4
JournalJapanese Journal of Applied Physics
Volume27
Issue number10 R
DOIs
Publication statusPublished - Oct 1988

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

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