Performance of Pickup Coil Made of Litz Wire and Coupled to HTS SQUID
| Autor: | Takuro Mihaya, Akira Tsukamoto, Akihiko Kandori, K. Tanabe, Masaaki Matsuo, Takashi Yoshida, Ryuji Momotomi, Seiji Adachi, Keiji Enpuku |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Squid
Materials science biology Magnetometer business.industry Litz wire Cooled pickup coil engineering.material Physics and Astronomy(all) Noise (electronics) law.invention Inductance Nuclear magnetic resonance law Electromagnetic coil biology.animal engineering Eddy current Optoelectronics business HTS SQUID Coil tap |
| Zdroj: | Physics Procedia. 36:400-404 |
| ISSN: | 1875-3892 |
| DOI: | 10.1016/j.phpro.2012.06.252 |
| Popis: | 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 fT/Hz 1/2 for f > 20 kHz. The experimental results agreed reasonably well with the designed values. |
| Databáze: | OpenAIRE |
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