| 摘要 |
<p>The frictional heating of an NMR sample spinner supported on a cylindrical gas bearing (10) inside a cylindrical bearing stator (3) is negated by recirculating the turbine exhaust gas (23) over the rotor surface inside the RF coil. The technique is more effective with microturbines of relatively high insentropic efficiency. Plugs (24) extend axially into the sample container from each end so that the sample (8) is confined to the central region beyond the gas bearing region so the thermal gradients are minimized and RF homogeneity is improved.</p> |
