Gyrotrons FU FU CW VII for 600 MHz and 300 MHz DNP-NMR spectroscopy

For DNP-NMR spectroscopy, we need high power sub-THz radiation sources with the output power of several tens watts. We have developed Gyrotrons FU CW VII operating in 200 GHz band and 400 GHz band as radiation source for 600 MHz and 300 MHz DNP-NMR spectroscopy. We have installed it at University of Warwick. UK and begun the DNP-NMR measurement.