RF receiver coil arrangement for NMR spectrometers

Abstract

In the case of a nuclear magnetic resonance spectrometer containing a sample (1) arranged in a homogeneous magnetic field and being adjusted approximately to room temperature or a higher temperature, and a RF receiver coil (3) which is arranged around the sample (1) and cooled down to far below room temperature, for receiving nuclear magnetic resonance signals from the sample (1), at least certain parts of the RF receiver coil (3) are in thermal contact with a cooled platform (7). The connection lines of the RF receiver coil (3), the outer resonator wall (10), the pre-amplifier and the coolant transfer lines can be cooled by cold return gas. Thanks to this arrangement of the RF receiver coil (3), one achieves an optimum space factor, the thermal noise of the receiver system is drastically reduced, the Q factor of the resonant circuit is increased, and consequently the signal-to-noise ratio is improved.

Dependencies are inferred from the claim text.