Performance of pickup coil made of Litz wire and coupled to HTS SQUID

K. Enpuku, R. Momotomi, T. Mihaya, M. Matsuo, T. Yoshida, A. Kandori, K. Tanabe, S. Adachi, A. Tsukamoto

Research output: Contribution to journalConference articlepeer-review

3 Citations (Scopus)


Performance of a copper pickup coil coupled to HTS SQUID was studied. The coil was made of Litz wire to prevent the eddy current loss at high frequencies, and was cooled at T = 77 K to reduce the thermal noise. The coil with average diameter D = 50 mm and number of turns N = 150 was made with the Litz wire, and was resonantly coupled to HTS SQUID made of ramp-edge junction. The 59-turn input coil was made of superconducting thin film and coupled to the SQUID with flip chip coupling scheme, which gave the mutual inductance of M=1700 pH. The field noise of the magnetometer was measured to be about 1 f > Hz1/2 for f > 20 kHz. The experimental results agreed reasonably well with the designed values.

Original languageEnglish
Pages (from-to)400-404
Number of pages5
JournalPhysics Procedia
Publication statusPublished - 2012
EventSuperconductivity Centennial Conference, SCC 2011 - The Hague, Netherlands
Duration: Sept 18 2011Sept 23 2011

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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