| US 7,557,578 B1 | ||
| Low loss NMR sample holder | ||
| Albert P. Zens, Salinas, Calif. (US); and Jason William Cosman, Livermore, Calif. (US) | ||
| Assigned to Varian, Inc., Palo Alto, Calif. (US) | ||
| Filed on Aug. 29, 2008, as Appl. No. 12/202,023. | ||
| Int. Cl. G01V 3/00 (2006.01) | ||
| U.S. Cl. 324—321 [324/318] | 10 Claims |
| 1. An NMR sample holder assembly for use with an RF saddle coil of an NMR probe, said saddle coil defining an RF magnetic
axis, said sample holder assembly adapted to accept at least a pair of cylindrical NMR sample tubes each of the sample tubes
of diameter D, the sample holder comprising:
an axially symmetric body and a first planar end surface transverse to an axis of said body, said body comprising a bore of
diameter greater than 2D, said bore coaxial with the body axis, said NMR sample holder assembly adapted to engage with said
NMR probe in selected relative azimuthal orientation therebetween;
a top alignment plate comprising at least a pair of apertures and said top alignment plate disposed in a recess in said top
planar end surface, said pair of apertures displaced by a selected spatial interval, said spatial interval defining a first
transverse axis, said first transverse axis azimuthally aligned at a selected angle to the RF magnetic axis of said RF saddle
coil; and
a bottom alignment plate comprising at least a pair of apertures and said bottom alignment plate disposed in a recess in a
bottom planar surface parallel with said first planar end surface, said pair of apertures displaced by said selected spatial
interval, said spatial interval defining a bottom transverse axis, said first transverse axis and said bottom transverse axis
being in mutual alignment;
said apertures for accepting and supporting at least a pair of cylindrical sample tubes, each said tube comprising an axis
of symmetry and said symmetry axes in precise mutual alignment.
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