FAST DIGITAL METER OF THE PHASE DIFFERENCE BETWEEN THE ION BEAM AND ACCELERATING VOLTAGE SIGNALS
G. V. Karpov1, A. S. Styuf1,2
1Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences, pr. Akademika Lavrent’eva 11, Novosibirsk, 630090, Russia
2Novosibirsk State University, ul. Pirogova 2, Novosibirsk, 630090 Russia
Keywords: digital signal processing, phase measurement, quadrature detection, synchronous detection
Abstract
A fast meter of the phase difference of two arbitrarily shaped signals at a frequency of 0.2 to 6 MHz is proposed. The device allows measuring the phase difference for the first harmonic with an error of not more than 1° within ~20 μs. The signal frequency and amplitude may vary at a speed of up to 20 MHz/s and 40 dB/sec, respectively. Basic signal processing and phase calculation are implemented digitally in a field programmable gate array. The electronics design features are presented, the signal processing methods are described, and the meter parameters and the results obtained on the physical facility are given.
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