Title :
High-Tc dc SQUID cooled by pulse-tube cooler and corrosion measurements
Author :
He, Dongfeng ; Yoshizawa, M. ; Yashiro, H. ; Nakamura, M.
Author_Institution :
SQUID Group, Nat. Inst. for Mater. Sci., Ibaraki, Japan
fDate :
3/1/2005 12:00:00 AM
Abstract :
We developed an YBCO high-Tc dc superconducting quantum interference device (SQUID) system cooled by a pulse-tube cooler. To stabilize and control the operating temperature of SQUID, a temperature controlling method, using dc SQUID itself as the temperature sensor, was developed. With the temperature controller, the temperature fluctuation could be reduced to about 50 mK and the dc SQUID magnetometer could keep locking for over 8 h. Using this dc SQUID magnetometer, we did some corrosion measurements in shielding. The field produced by the corrosion of aluminum plate with one side immersed in corrosion solution could be successfully detected.
Keywords :
SQUID magnetometers; barium compounds; corrosion; high-temperature superconductors; temperature control; temperature sensors; yttrium compounds; YBa2Cu3O7; aluminum plate corrosion; corrosion measurements; corrosion solution; dc SQUID magnetometer; high-tc dc SQUID; operating temperature; pulse-tube cooler; superconducting quantum interference device; temperature controller; temperature controlling method; temperature fluctuation; temperature sensor; Corrosion; Fluctuations; Interference; Magnetic field measurement; Pulse measurements; SQUID magnetometers; Superconducting devices; Temperature control; Temperature sensors; Yttrium barium copper oxide; Corrosion; pulse-tube cooler; superconducting quantum interference device (SQUID); temperature controller;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2005.844130
