Abstract
A method for measurement of gyrotron amplitude noise using the Mach-Zehnder interferometer as a rejection filter, the measurement facility, and results of testing a 140-GHz industrial high-power gyrotron are discussed. The method improved the sensitivity by two orders of magnitude over that of the direct detection method. The experimental relative power spectral density in a frequency range of 50–250 MHz from the line center is 7 × 10−20–5 × 10−19 1/Hz.
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Original Russian Text © L.V. Lubyako, N.K. Skalyga, A.N. Kuftin, 2009, published in Zhurnal Tekhnicheskoĭ Fiziki, 2009, Vol. 79, No. 9, pp. 89–95.
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Lubyako, L.V., Skalyga, N.K. & Kuftin, A.N. Noise spectrum of the 140-GHz gyrotron designed for controlled thermonuclear fusion installations. Tech. Phys. 54, 1332–1338 (2009). https://doi.org/10.1134/S1063784209090138
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DOI: https://doi.org/10.1134/S1063784209090138