Thermal buffering of cross-coils in high-power nmr decoupling

Abstract From the Canadian patent

A transverse rf foil saddle coil for use in NMR is affixed in intimate thermal contact on one surface of a ceramic cylindrical coilform of high thermal conductivity, - often for solid samples at high fields where the axis of the coilform is not aligned, with B0. An orthogonal rf coil is mounted in intimate thermal contact to the first, saddle coil via a ceramic spacer or coilform. The coilform is cooled by highvelocity, gas flow - often also associated with bearing exhaust gas from a high speed sample, spinner. The two coils are tuned to different rf frequencies with circuits capable of, supporting high rf currents. The rf coils may be magnetically compensated and expansion controlled, …