Accordingly, coherent polarization transfers were initially demonstrated with the nuclear orientation via electron spin locking (NOVEL) experiment , which employs a spin locking sequence on the electrons, and utilizes a Rabi field that matches the lab frame nuclear Larmor frequency, ω $& = ω !" . A complete theory of NOVEL is published and it was explored experimentally at 9 and 34 GHz where transient oscillations were observed. A ramped version of NOVEL was shown to substantially improve the enhancements. In experiments to date, NOVEL has not shown a frequency dependence and can be considered a "gold standard" for time domain DNP. Nevertheless, the requirement to match the Larmor frequency with the Rabi field renders it a challenging experiment at high fields (>800 MHz for 1 H).