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Electric Field of a Symmetrically Excited Shielded Capacitor with Additional Electrodes

  • ELECTROMAGNETIC MEASUREMENTS
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Measurement Techniques Aims and scope

The main element of the reference field-forming system of the State Primary Standard of the unit of electric field strength in the frequency range from 0 to 20 kHz under GET 158-2020 is a reference converter consisting of a shielded capacitor with flat round plates and additional electrodes connected to an AC or DC voltage source. Due to the approval of the standard in the specified composition and the change in the power supply scheme of the reference field-forming system from asymmetric to symmetric, the maximum value of the intensity reproduced by the standard has been increased from 2000 to 4000 V/m and the accuracy of its reproduction and transmission has been increased. For the case of a symmetric power supply, it was necessary to derive a measurement equation linking the reproducible value and the input parameters of the reference converter (voltage, geometric dimensions). The derivation of the measurement equation of a reference converter excited by a symmetric voltage is presented, obtained as a result of solving an electrostatic problem with symmetric boundary conditions for the potential of the electrodes. Optimal values of the voltages applied to the additional electrodes are found in order to obtain maximum uniformity of the electric field in the region of the center of the converter. It is shown that the nonuniformity of the field for a specific implementation of a shielded capacitor is no greater than 0.1%. The results obtained can be used in the field of the metrology of constant and variable electric fields in the development of reference sources of electric field and working standards.

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Notes

  1. GOST R 8.564-96. GSI. State verification scheme for facilities for measurement of electric field strength in the frequency range 0–20 kHz.

  2. GOST R 8.805-2012. State verification scheme for facilities for measurement of electric field strength in the frequency range 0.0003–2500 MHz.

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Authors and Affiliations

  1. Russian Metrological Institute of Technical Physics and Radio Engineering measurements, Mendeleevo, Moscow Oblast’, Russia

    V. A. Tishchenko, V. I. Lukyanov & A. A. Smirnov

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  1. V. A. Tishchenko
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  2. V. I. Lukyanov
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  3. A. A. Smirnov
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Correspondence to V. A. Tishchenko.

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Translated from Izmeritel'naya Tekhnika, No. 9, pp. 52–56, September, 2022.

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Tishchenko, V.A., Lukyanov, V.I. & Smirnov, A.A. Electric Field of a Symmetrically Excited Shielded Capacitor with Additional Electrodes. Meas Tech 65, 674–678 (2022). https://doi.org/10.1007/s11018-023-02138-4

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  • DOI: https://doi.org/10.1007/s11018-023-02138-4

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