NMR Probeheads for Biophysical and Biomedical Experiments: Theoretical Principles & Practical GuidelinesImperial College Press, 2006 - 596 sider NMR Probeheads for Biophysical and Biomedical Experiments is essential reading for anyone in the field of NMR or MRI, from students to medical or biological scientists performing experiments under certain physical and/or geometrical conditions, unattainable by conventional or available probes. The material guides the reader through the most basic and comprehensive stages in accomplishing a correct probe design, from a very basic oscillating circuit to much more elaborate designs. The general principles of matching and tuning probes are presented while some typical examples are explained in detail. Preventing NMR probes from becoming radiating antennas, multiple tuning principles, and steps for evaluating and debugging a probe are all covered. For the first time, these principles are applied for both homogeneous and heterogeneous resonators. The book is accompanied by a CD that contains software utilities used to exemplify the stages of different probe designs. Book jacket. |
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assumed axis B₁ balun birdcage C₁ C₂ calculated capacitance values capacitive coupling centre characteristic impedance coaxial component values conductor configuration connected corresponding coupling loop current density current distribution current filaments cylinder decoupling depends diameter dielectric dimensions diodes double tuned efficiency end-ring equal equations field homogeneity filaments geometry Hence high frequency hybrid impedance matching inductive coupling inductor L₁ L₂ legs length load loop gap lumped elements Magn magnetic field magnetic field created matching capacitor matching network matrix mutual inductance NMR probe obtained optimum parallel phase plane probe coil probe design proton pulse Q factor ratio reflection coefficient resistance resonant circuit resonant frequency resonant modes RF field RLC circuit rotating saddle coil sample coil segments sensitivity shield shown in Fig signal slotted tube solenoid solution strip surface coil symmetric tank circuit transmission line transmitter tuning and matching tuning capacitor voltage wire Z₁