Open AccessDetection of nuclear magnetic resonance in the microtesla range using a high Tc dc-superconducting quantum interference device
Author(s) -
Li Shao,
Ren Yu-Feng,
Ning Wang,
Ye Tian,
Chu Hai-Feng,
Songlin Li,
Yingfei Chen,
Jie Li,
Chen Geng-Hua,
Dewen Zheng
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.58.5744
Subject(s) - superconductivity , nuclear magnetic resonance , materials science , free induction decay , magnetic field , signal (programming language) , spin echo , resonance (particle physics) , interference (communication) , noise (video) , range (aeronautics) , magnetic resonance imaging , physics , condensed matter physics , atomic physics , electrical engineering , channel (broadcasting) , engineering , quantum mechanics , composite material , medicine , artificial intelligence , computer science , image (mathematics) , radiology , programming language
We have carried out nuclear magnetic resonance experiments in microtesla range.The free induction signal was recorded using a high Tc dc-superconducting quahtum interference device.The measurement was performed in a home-made magnetic shield room.Resonance spectra of 1H from a sample of 15 ml tap water was obtained in the field range from 7—70 μTcorresponding to resonance frequency of 300—3000 HzThe signal to noise ratio in a single-shot measurement is around 4which could be increased to about 40 after 100 times averaging.The effect of residual magnetic field in the shield room prepolarization time and data acquisition time was investigated.