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. Author manuscript; available in PMC: 2021 Jan 1.
Published in final edited form as: IEEE Trans Electron Devices. 2019 Dec 10;67(1):328–334. doi: 10.1109/ted.2019.2953658

Fig. 9.

Fig. 9.

The measured output power and frequency with respect to the operating magnetic field and fixed voltage of 16.7 kV and 90 mA of electron beam current. The gun coil magnet is operated up to ~ −35 mT to maximize the output power.