비자기 차폐환경에서 미세자기신호 측정을 위한 고온 초전도 SQUID 자력계의 설계 및 제작
Designs and Fabrications of High-TC SQUID Magnetometer for Measuring a Weak Signal without Magnetic Shielding
0
조회
0
다운로드
0
인용
0
참고문헌
초록
Abstract
We have designed and fabricated the YBCO single layer directly-coupled SQUID magnetometers for the purpose of magnetocardiography in a magnetically disturbed environment. The SQUID magnetometers were designed three different types of pickup coil such as solid type, PL type I and PL type II for further stable fluxed-locked-loop operation without magnetic shielding. Magnetometer was fabricated with a single layer YBCO thin film deposited on STO(100) bicrystal substrate with misorientation angle of 30o. We have achieved a magnetic field noise BN of 30 fT/Hz1/2 at 100 Hz, and less than 70 fT/Hz1/2 at 1 Hz. The PL type II SQUIDs have exhibited the most stable fluxed-locked-loop operation in a magnetically unshielded environment.
참고문헌 (11)
- "Conductivity Tomography for Non-destructive Evaluation Using Pulsed Eddy Current with HTS SQUID magnetometer", 13, pp.215~218 (2003)
- "nondestructive testing of Niobium Sheets for Superconducting resonators", 13, pp.239~244 (2003)
- "High Transition Temperature Superconducting Quantum interference Devices", 71(3), pp.631~678 (1999)
- "and H.C. Yang Biomagnetic measurements with HTS SQUID Magnetometers in Moderate Shielded Environment", pp.381~384 (2003)
- "Application of SQUID Magnetometers in fetal agnetocardiography", 1, pp.771~774 (1997)
- "Optimazation of direct-coupled High-TC SQUID Magnetometers for Operation in Magnetically Unshielded Environment", 11, pp.1315~1318 (2001)
- "Development of a High-TC SQUID Based Magnetometer System for MCG Measurement", E85-C,(3), pp.670~676 (2002)
- "Magnetic Nackground Noise Cancellation in Real-world Environments", 71, pp.1529~1533 (2000)
- "Low-frequency Noise of Improved Direct-coupled Hogh-TC superconducting Quantum Interference Device Magnetometers in AC and DC magnetic Fields", 75, pp.2821~2823 (1999)
- "Low Frequency Noise in High Transition Temperature Superconducting Multiplayer Manetometers in Ambient magnetic Fields", 79, pp.2438~2440 (2001)
- "First Derivative high-TC SQUID Gradiometers with Narrow Structure from Single Layer YBCO Thin Film", e85-c(3), pp.677~680 (2002)