Abstract
We have developed a relatively large high-Tc Bi-Pb-Sr-Ca-Cu-O superconducting magnetic shield vessel of 150mm in inner diameter, 320mm in depth and 10mm in thickness. Magnetic fields inside the vessel were measured by using an RF SQUID magnetometer. The shielding factors, defined as the ratio of the magnetic field at 290K to that at 77K, were l×105 in the very low frequency range through 0.2 to 100Hz, which was measured near the bottom position of the vessel. Our experimental data are most important because the magnetic fields from human brains are as weak as 10−12T with low frequencies below 10Hz. Such a high attenuation ratio in the very low frequency region indicates that magnetic shielding of a high-Tc superconductor is promising for neuromagnetic measurement with SQUIDs.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
