Abstract
A complete design of 132GHz gyrotron for 200MHz DNP–NMR spectroscopy application is presented in this article. The design is performed considering a frequency tunability range of 3GHz and output power around 100W. A smooth frequency tunability is achieved via the excitation of TE03p modes (p=1–6) through the variation of cavity magnetic field. The start oscillation current calculation is performed to estimate the required magnetic field for each TE03p mode. Cold cavity analysis and beam–wave interaction computation are carried out for the estimation of quality factor, resonant frequency corresponding to each TE03p mode, axial electric field profile and output power. Other important components of gyrotron such as magnetron injection gun, non-linear taper and RF window are also designed considering the smooth frequency tunability a main design parameter.
Published Version
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