Bruker Biospin Ag

Hannes Grubinger

Joerg Hinderer

Dirk Wilhelm

Joost A B Lohman

A DNP apparatus includes a cryostat () having an opening () and a loading path for a sample (), the loading path extending from the opening to a sample receptacle (), with a cryomagnet and a microwave source () as well as a configuration for supplying microwave radiation from the microwave source to the sample, which comprises a microwave path extending directly to the sample. The microwave path extends spatially separately from the loading path and the configuration for supplying microwave radiation has at least one microwave feed-through passing through one or more walls of the cryostat. The microwave path is incident on the sample from a direction opposite to the loading path or from a sideward direction at right angles to or at an inclination with respect to the axis of the loading path. This leads to simple and efficient polarization of the electron spins in the sample.

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Zurich, Switzerland

Hannes Grubinger