Development of frequency continuous tunable gyrotron (Gyrotron FU CW VI)using 15 T superconductive magnet for 600 MHz DNP-NMR spectroscopy

摘要

A dynamic nuclear polarization (DNP) method which improves the sensitivity of thenuclear magnetic resonance (NMR) spectroscopy by high power irradiation of sub-millimeter wave is expected to analyze the structures of complex proteins. Continuous frequency tunable gyrotron is required to obtain maximum enhancement of NMR sensitivity. We have developing fundamental oscillation gyrotron by using a 15 T superconducting magnet. The deveploped prototype gyrotoron (Gyrotron FU CW VI) has the tunability of 1.6 GHz and the output power exceed about 10W. In additon, stable continous wave operation for 10 minuteswas achived in low power operation.