Regensburg 2010 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 15: Poster: Nuclear Magnetic Resonance - Frontiers and Applications

CPP 15.10: Poster

Monday, March 22, 2010, 16:30–18:00, Poster C

Field-cycling-NMR: A new magnet design for reduced energy consumption — •Dirk Plendl, Alexei F. Privalov, and Franz Fujara — Institut für Festkörperphysik, TU Darmstadt, Hochschulstraße 6, 64289 Darmstadt

Field-cycling-NMR is an establiched method for the investigation of field dependent spin phenomena, like relaxation dispersion, polarization transfer, enhanced NQR etc. In contrast to normal NMR, the magnetic field in a field-cycling experiment is switched between several distinct levels within milliseconds. This can only be achieved with specially designed, low inductive magnets.

Today, nearly all FC-spectrometers utilize air core coils made of copper or silver. Producing strong magnetic fields with normal-conducting magnets results in a large energy dissipation (tens of kW) so that the maximum field strength is limited by the amount of heat that can be extracted by the cooling system.

We present a new magnet design for fast field-cycling-NMR which uses a magnet with an iron core for field amplification, thus generating the same field with significantly reduced energy consumption and system complexity [1].

[1] D. Plendl, M. Fujara, A. F. Privalov, F. Fujara, J. Mag. Res. 198 (2009) 183-187