A signal input coil made of superconducting thin film for improved signal-to-noise ratio in a high-Tc SQUID-based ultra-low field nuclear magnetic resonance system

Kuen Lin Chen, Chin Wei Hsu, Yue Bai Ku, Hsin Hsien Chen, Shu-Hsien Liao, Li Min Wang, Herng-Er Horng, Hong-Chang Yang

    研究成果: 雜誌貢獻期刊論文同行評審

    1 引文 斯高帕斯(Scopus)

    摘要

    Resonant coupling schemes are commonly used in SQUID-based ultra-low field (ULF) nuclear magnetic resonance (NMR) systems to couple the spin relaxation signals from samples to the SQUID. Generally, in NMR systems, a resonant coupling scheme is composed of two solenoid coils which are made of enamel insulated wires and a capacitor connected in series. In this work, we tried to replace the metal solenoid input coil with a planar high-Tc superconducting spiral coil to improve the signal-to-noise ratio (SNR) of the ULF NMR signal. A measurement of the free induction decay signal of water protons was performed to demonstrate the improved performance of the system. This improvement is due to the fact that the planar superconducting spiral coil possesses a higher mutual inductance with the SQUID. Therefore, it is a promising way to enhance the SNR of high-Tc SQUID-based ULF NMR/MRI systems.

    原文英語
    文章編號115008
    期刊Superconductor Science and Technology
    26
    發行號11
    DOIs
    出版狀態已發佈 - 2013 十一月 1

    ASJC Scopus subject areas

    • 陶瓷和複合材料
    • 凝聚態物理學
    • 金屬和合金
    • 材料化學
    • 電氣與電子工程

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