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We have developed the Gyrotron FU CW VII for 300 MHz and 600 MHz DNP-NMR spectroscopy. For high frequency DNP-NMR experiment, high power sub-THz radiation sources are required. Gyrotron is able to emit enough power and appropriate frequency in sub-THz region for DNP. This Gyrotron emits electromagnetic waves with high power and appropriate frequency for each DNP-NMR spectroscopy (used cavity modes...
The design of a gyrotron for continuous wave operation at 395 GHz at a power level from several watts to 2 kilowatts is presented. The gyrotron oscillator will be used for development of high sensitive NMR with dynamic nuclear polarization (DNP) method. The gyrotron design is optimized for single mode operation at second harmonic of the electron cyclotron frequency, omega=2omegac by removing the mode...
In summary, computer-controlled stable operation of a 0.46 THz CW gyrotron oscillator has successfully been demonstrated for 24 hours yielding great power stability, which is a major advance in proving the unique capability of gyrotrons for many kinds of applications requiring a few watts of CW power, such as imaging and medical therapy at submillimeter wavelength. Especially, this technology should...
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