Nmr Probeheads For Biophysical And Biomedical Experiments: Theoretical Principles And Practical Guidelines (2nd Edition)World Scientific Publishing Company, 27. maj 2015 - 756 sider NMR Probeheads for Biophysical and Biomedical Experiments 2nd Edition 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.This new edition has been revised and updated to include a chapter dedicated to RF components, which are commonly used for probes realization and their frequency-dependent characteristics. Another completely revised chapter concerns the multiple coil systems and discusses arrays coils, different decoupling methods, and some principles for interfacing coils with low-noise preamplifiers. The principles of linear circuit analysis are presented in a dedicated chapter. Last but not least, accompanying files containing updated software for probe design have been made available from the publisher's website. |
Indhold
| 1 | |
| 23 | |
3 Introduction to Linear Network Analysis | 155 |
4 Interfacing the NMR Probehead | 197 |
5 Quadrature Driving | 295 |
6 Multiple Frequency Tuning | 345 |
7 Magnetic Field Amplitude Estimation | 427 |
8 Homogeneous Resonators | 467 |
9 Heterogeneous Resonators | 601 |
10 Probe Evaluation and Debugging | 655 |
Appendix A Physical Constants and Useful Formulae | 691 |
| 709 | |
| 733 | |
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assuming balun birdcage cable calculated capacitance values Chapter characteristic impedance coaxial component values conductor configuration connected corresponding coupling loop current density current distribution cylinder decoupling depends diameter dielectric dimensions diodes double tuned efficiency end ring equal equations equivalent field distribution geometry given Hence high frequency homogeneity hybrid impedance matching inductive coupling inductor isolated Lcoil legs length load loop gap losses lumped element magnetic field magnetic field amplitude matching circuit matching network matrix mutual inductance NMR probe noise obtained output parallel phase PIN diodes plane port preamplifier probe circuit probe coil probe design probe resonator proton Q factor quadrature ratio reflection coefficient resistance resonant circuit resonant frequency resonant modes RF field S-parameters saddle coil sensitivity shield shown in Fig signal simulation Smith Chart solenoid solenoid coil strip surface coil switching symmetric tank circuit transmission line tuning and matching tuning capacitor voltage