Abstract
Incorporating special active shielding for unshielded SQUID based applications, a magnetocardiography (MCG) system has been designed and implemented. The MCG system consists of two High Tc rf SQUID magnetometers which are placed in an axial gradiometer arrangement. The considered active shield is a two stages of shielding system, each of which has been designed for different frequency and dynamic range characteristics. Using this shielding system, the disturbing magnetic signals of the environment could be attenuated such that the nano-tesla artificial heart signal could be obtained in our unshielded laboratory environment. The system is based on a designed liquid nitrogen dewar with rf-interference aluminum shield and appropriate structure for short liftoff. The system incorporates a two channel rf SQUID electronic readout and also the required PID circuit controller for active shielding system. In this work, different parts of the MCG system is explained and the effectiveness of the active shield system and the obtained results of the implemented SQUID based MCG system is presented.
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.
