TY - JOUR
T1 - Performance of pickup coil made of Litz wire and coupled to HTS SQUID
AU - Enpuku, K.
AU - Momotomi, R.
AU - Mihaya, T.
AU - Matsuo, M.
AU - Yoshida, T.
AU - Kandori, A.
AU - Tanabe, K.
AU - Adachi, S.
AU - Tsukamoto, A.
N1 - Funding Information:
The present study was partly supported by Strategic Promotion of Innovative R&D in Japan Science and Technology Agency
Publisher Copyright:
© 2012 Published by Elsevier B.V. Selection and/or peer-review under responsibility of the Guest Editors.
PY - 2012
Y1 - 2012
N2 - 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.
AB - 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.
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U2 - 10.1016/j.phpro.2012.06.252
DO - 10.1016/j.phpro.2012.06.252
M3 - Conference article
AN - SCOPUS:84911922821
SN - 1875-3892
VL - 36
SP - 400
EP - 404
JO - Physics Procedia
JF - Physics Procedia
T2 - Superconductivity Centennial Conference, SCC 2011
Y2 - 18 September 2011 through 23 September 2011
ER -