Environmental Noise Cancellation for High-TC SQUID-Based Magnetocardiography Systems Using a Bistage Active Shield

Shanehsazzadeh, Faezeh; Kalantari, Nafise; Sarreshtedari, Farrokh; Fardmanesh, Mehdi

doi:10.1109/tasc.2017.2740722

Cited by 6 publications

(1 citation statement)

References 24 publications

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“…Interference Devices (SQUIDs) have been of great research attention for magnetometry [1], non-destructive evaluation (NDE) [2], geophysical measurements [3], bio-magnetic measurements and in particular, magneto-cardiography [4], [5] for its noninvasive nature [6].…”

Section: Introduction Uperconducting Quantummentioning

confidence: 99%

HTS YBCO Resonator Configuration With a Coplanar Optimized Flux Concentrator Strongly Coupled to rf SQUID

Qaderi

Shanehsazzadeh

Mazdouri

et al. 2018

IEEE Trans. Appl. Supercond.

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We developed a novel magnetic coupling module formed of a monolayer superconducting flux concentrator, which is integrated with a coplanar resonator strongly coupled to HTS rf-SQUID. Three types of resonators, including a long stripline resonator between input loop and pick-up loop of the flux concentrator, a complementary split ring resonator (CSRR), and also a spiral shape inside the input loop are explored. The resonance quality factors as well as the coupling to the SQUID of different patterns of these three types of the resonators is evaluated using Finite Element Method (FEM) simulations. Several readout methods to couple the electronic system to the resonators are tested, including inductive (coil) and capacitive (transmission line) couplings, and the optimum readout is reported for each of the resonators. Among the evaluated resonator types, a spiral shape resonator with optimal design showing the highest quality factor (5900) together with the strongest coupling to the SQUID (-0.5 dB) at resonance frequency of 836 MHz, is fabricated using 200 nm thick superconducting YBCO on a 1 mm thick crystalline LaAlO3 substrate. The flux concentrator of the module is optimized by the variation of its linewidths and also its input loop radius to obtain maximum flux transformation efficiency.  Index Terms-Flux Concentrator, High-Tc-Superconductor, rf SQUID, Resonator, Magnetometer.

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Section: Introduction Uperconducting Quantummentioning

confidence: 99%

HTS YBCO Resonator Configuration With a Coplanar Optimized Flux Concentrator Strongly Coupled to rf SQUID

Qaderi

Shanehsazzadeh

Mazdouri

et al. 2018

IEEE Trans. Appl. Supercond.

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Noninvasive Research on Cardiac Electrical Activity by Non-Gaussian Prior Bayesian Matching Pursuit

Wen

2020

Communications in Computer and Information Science

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Feasibility analysis of a modular uniform magnetic field coil

Jin

Pan

Sun

et al. 2020

Review of Scientific Instruments

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In this paper, a feasibility analysis of a modular uniform magnetic field coil is provided. The modular uniform magnetic field coil consists of n2 square coil units. By adjusting the number of coil units or the current in the coil units, different sizes and patterns of uniform magnetic field coils can be easily formed to meet different experimental requirements. An analytical model of the modular uniform magnetic field coil considering the gap between coil units is first developed based on the Biot–Savart law and the superposition principle, and the analytical model is verified by the 3D finite element method. Then, the characteristics of the modular uniform magnetic field coil are analyzed and compared with the traditional Helmholtz coil, demonstrating the advantages of the proposed magnetic field coil. These advantages precisely verify the original intention of the modular uniform magnetic field coil proposed in this paper. Finally, a robustness analysis of the modular magnetic field coil is performed, including the effects of gap between coil units and assembly misalignment on the performance of the modular uniform magnetic field coil.

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Environmental Noise Cancellation for High-TC SQUID-Based Magnetocardiography Systems Using a Bistage Active Shield

Cited by 6 publications

References 24 publications

HTS YBCO Resonator Configuration With a Coplanar Optimized Flux Concentrator Strongly Coupled to rf SQUID

HTS YBCO Resonator Configuration With a Coplanar Optimized Flux Concentrator Strongly Coupled to rf SQUID

Noninvasive Research on Cardiac Electrical Activity by Non-Gaussian Prior Bayesian Matching Pursuit

Feasibility analysis of a modular uniform magnetic field coil

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