February 13, 2012 - This post is not particular about DNP. However, it is a very interesting piece of instrumentation that demonstrates the state-of-the-art of instrumentation for MAS-NMR.
January 6, 2012 - Griffin, R. G. J. Magn. Reson. 2011, 213, 410 http://dx.doi.org/10.1016/j.jmr.2011.08.015 In the 1990’s we initiated development of high frequency gyrotron microwave sources with the goal of performing dynamic nuclear polarization at magnetic fields (~5-23T) used in contemporary NMR experiments.
October 5, 2011 - de Rijk, E.; Macor, A.; Hogge, J.; Alberti, S.; Ansermet, J. Review of Scientific Instruments 2011, 82, 066102.
August 22, 2011 - Torrezan, A.C., et al., Operation of a Continuously Frequency-Tunable Second-Harmonic CW 330-GHz Gyrotron for Dynamic Nuclear Polarization.