Patent ID: 11927653
Assignee: JEOL LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A solid sample Nuclear Magnetic Resonance (NMR) probe comprising:
(a) a parent coil circuit comprising:
a capacitor (220) selected based on one or more of a NMR instrument, the solid sample NMR probe and a solid sample to be analyzed; and
a parent coil (210) with an inductance L2;

(b) a stator adapted to rotate the solid sample, where a main axis of the stator is at a fixed angle relative to a magnetic field of the NMR instrument, where the stator is adapted to hold the solid sample at the fixed angle; and
(c) an idler coil circuit comprising a variable capacitor (221) and an idler coil (211) having inductance L1, where the NMR instrument is adapted to excite the solid sample with a Radio Frequency (RF) field at a Larmor frequency, where a coupling constant (K) between the parent coil (210) and the idler coil (211) is given by K=M*(L1*L2)1/2, where M is a mutual inductance between L1 and L2, where the idler coil is adapted to orient relative to the parent coil circuit a fixed position such that K is constant, where the RF field symmetry of the parent coil is minimally affected by the position of the idler coil (211), where the solid sample NMR probe is adapted to be introduced into the magnetic field, where the solid sample NMR probe is adapted to allow the stator to spin the solid sample; and
(d) a means of adjusting the variable capacitor (221) to observe a tuned condition between the parent coil (210) and the idler coil (211) such that a S11 plot of two closely spaced nuclei are matched to a minimal reflective power, where a Circuit Fill Factor (CFF) of the two closely spaced nuclei are approximately equal at the tuned condition.