A magnetic field control system for a variable field NMR spectrometer.
The magnetic field specifications necessary for use as part of a variable field NMR spectrometer are outlined. Although the widely used commercial magnet systems provide a high degree of temporal field stability and accuracy, they are relatively costly. This publication describes a novel and inexpensive magnet power supply, with field control provided by a Hall effect device. The system has been used successfully to determine in vitro NMR relaxation times and the magnetization transfer characteristics of human thyroid and breast tissues.
Callicott
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The Clinical Physics Group, The Royal Hospitals NHS Trust, London, UK.
D001940:Breast / Q000737:chemistry; D011211:Electric Power Supplies; D004574:Electromagnetic Fields; D004867:Equipment Design; D006801:Humans; D066298:In Vitro Techniques; D009682:Magnetic Resonance Spectroscopy / Q000295:instrumentation* / Q000379:methods*; D013053:Spectrophotometry / Q000191:economics / Q000295:instrumentation; D013961:Thyroid Gland / Q000737:chemistry