发明申请
- 专利标题: NMR SPIRAL RF PROBE COIL PAIR WITH LOW EXTERNAL ELECTRIC FIELD
- 专利标题(中): NMR螺旋射频探头线圈与低外部电场
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申请号: US12187691申请日: 2008-08-07
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公开(公告)号: US20100033184A1公开(公告)日: 2010-02-11
- 发明人: Richard S. Withers , Robert E. Nast , Weston A. Anderson
- 申请人: Richard S. Withers , Robert E. Nast , Weston A. Anderson
- 主分类号: G01R33/341
- IPC分类号: G01R33/341
摘要:
RF electric fields produced by electric potential differences in NMR probe coil windings may penetrate the NMR sample and sample tube causing sensitivity loss and noise in NMR spectroscopy. Counter-wound spiral coils placed on the opposite surfaces of a planar substrate or on two adjacent planar substrates produce electric potentials that minimize the electric field over the sample region, thereby increasing the sensitivity of the NMR probe. Alternatively counter-wound spiral coils placed adjacent to each other on the outer surface of two concentric cylindrical surfaces that surround the NMR sample minimize the electric field over the sample region. The electric potential of the spiral coils is reduced by adjusting a length of at least one coil.