title: High power pulsed dynamic nuclear polarisation at 94 GHz.
abstract: In this communication we report initial results using high power pulsed techniques at 94 GHz to perform solid state Dynamic Nuclear Polarisation (DNP) on high volume samples. It is shown that excitation with short pulses, comparable to the pi/2 pulse length, at fast repetition rates can result in higher DNP enhancements relative to continuous wave (cw) excitation for the same average power. Peak enhancements are observed at an average power of only a few hundred mW delivered to the sample.
authors.affiliation: School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, UK.
authors.forename: Robert I
authors.initials: RI
authors.lastname: Hunter
authors.forename: Paul A S
authors.initials: PA
authors.lastname: Cruickshank
authors.forename: David R
authors.initials: DR
authors.lastname: Bolton
authors.forename: Peter C
authors.initials: PC
authors.lastname: Riedi
authors.forename: Graham M
authors.initials: GM
authors.lastname: Smith