Patent ID: 7639007

Claim:
Apparatus for performing in-vitro DNP-NMR measurements on a sample, the apparatus comprising magnetic field generating apparatus located in a cryostat and surrounding a bore defining respective NMR and DNP working regions; a system for performing DNP on a suitably prepared sample in the DNP working region; a system for performing a NMR process on a sample in the NMR working region; a sample positioning mechanism which can be inserted in the bore to bring a sample in turn into each of the working regions, the magnetic field generating apparatus being suitably structured so that the magnetic field in the DNP working region has a homogeneity or profile suitable for performing DNP on the sample and the magnetic field in the NMR working region has a homogeneity or profile suitable for performing a NMR process on the sample, characterized in that the magnetic field generating apparatus comprises a pair of magnet assemblies located in the cryostat and surrounding respective, coaxial bores so as to define the corresponding NMR and DNP working regions in the bores, wherein the magnet assemblies are suitably shielded so that the magnetic field in the DNP working region has a homogeneity or profile suitable for performing DNP on the sample and the magnetic field in the NMR working region has a homogeneity or profile suitable for performing a NMR process on the sample.