NMR applications with industry – uncovering good physics along the way
pre-polarization field is needed over a large volume with rapid turn-off. The resonant transmitter pulses B1 are very non-uniform, so frequency swept (adiabatic) pulses are required; these need to be effective [...] the large counter-rotating field terms at low frequencies. Crucially, a modest amount of trapped oil (1 cm thick equivalent) needs to be detected against an overwhelming background signal of sea water, while …
