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Data recording system of a dispersion interferometer based on a CO2 laser

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Abstract

The data recording system of a multichannel double-pass dispersion interferometer based on a CO2 laser is described. This system has been designed to record the linear density of plasmas in a real-time mode with a time discreteness of 4 μs and resolution 〈N e L〉 ∼ 0.34 × 1013 cm−2 (N e is the electron component of the plasma density, and L is the plasma size in the wave propagation direction) in the range of linear density variations of up to 1017 cm−2. The system is built from unified recording modules that use fast ADCs to record the shape of photodetector and modulator signals and FPGA-based digital units of dataflow processing to form results of measurements. The single-channel recording module of the dispersion interferometer has been tested under actual experimental conditions of the GDL gas-dynamic trap and the TEXTOR tokamak (Julich, Germany).

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Authors and Affiliations

  1. Budker Institute of Nuclear Physics, Siberian Division, Russian Academy of Sciences, pr. Akademika Lavrent’eva 11, Novosibirsk, 630090, Russia

    A. D. Khil’chenko, A. N. Kvashnin, P. V. Zubarev, D. V. Moiseev & Yu. V. Kovalenko

  2. Novosibirsk State Technical University, pr. Karla Marksa 20, Novosibirsk, 630092, Russia

    A. D. Khil’chenko & S. V. Ivanenko

Authors
  1. A. D. Khil’chenko
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  2. A. N. Kvashnin
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  3. S. V. Ivanenko
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  4. P. V. Zubarev
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  5. D. V. Moiseev
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  6. Yu. V. Kovalenko
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Additional information

Original Russian Text © A.D. Khil’chenko, A.N. Kvashnin, S.V. Ivanenko, P.V. Zubarev, D.V. Moiseev, Yu.V. Kovalenko, 2009, published in Pribory i Tekhnika Eksperimenta, 2009, No. 3, pp. 78–90.

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Khil’chenko, A.D., Kvashnin, A.N., Ivanenko, S.V. et al. Data recording system of a dispersion interferometer based on a CO2 laser. Instrum Exp Tech 52, 382–393 (2009). https://doi.org/10.1134/S0020441209030154

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  • DOI: https://doi.org/10.1134/S0020441209030154

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