Abstract
We have developed a high Tc superconducting quantum interference device (SQUID) magnetometer utilizing a Cu pickup coil cooled to T = 77 K and a resonant-type coupling circuit. The thermal noise can be decreased by cooling the pickup coil, while the signal transferred to the SQUID can be increased by using the resonant-type coupling circuit. Four pickup coils with different radii were used in the experiment. For the pickup coil with a radius r = 15 mm and the number of turns n = 150, we obtained the magnetic field noise of SB1/2 = 26 fT/Hz1/2 at the resonant frequency of fr = 6.37 kHz.
| Original language | English |
|---|---|
| Pages (from-to) | 1396-1400 |
| Number of pages | 5 |
| Journal | Physica C: Superconductivity and its applications |
| Volume | 392-396 |
| Issue number | PART 2 |
| DOIs | |
| Publication status | Published - Oct 2003 |
| Event | Proceedings of the 15th International Symposium on Superconduc - Yokohama, Japan Duration: Nov 11 2002 → Nov 13 2002 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering