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A microwave detector based on an MCT photodiode for subthermonuclear plasma research

  • Physical and Technical Aspects of Micro- and Optoelectronics
  • Published:
Optoelectronics, Instrumentation and Data Processing Aims and scope

Abstract

A microwave detector including a single-element infrared (IR) photodiode mounted in a cooled Dewar and a preamplifier is developed. An IR photodiode of the n +-p type is created on the basis of mercury-cadmium telluride (HgCdTe or MCT) heteroepitaxial structures grown by means of molecular beam epitaxy. A special profile of MCT structures throughout the MCT layer thickness ensures a low series resistance of less than 10 Ω and a high quantum efficiency at a level of 0.65 without any antireflection coating. For the spectral range of 8 to 12 μm, IR photodiodes are characterized by a low threshold power of 3.8·10−13 W·Hz−1/2 and 10−19 W·Hz−1 in the direct and heterodyne regimes, respectively. The cooled Dewar maintains the operating temperature of the IR photodiode in the interval of 77 to 80 K for 8. The preamplifier operates in a frequency range up to 1 GHz. With the use of this microwave detector, a method is developed for detection of intensity of a CO2 laser beam on plasma fluctuations caused by heating by a relativistic electron beam (REB). At high REB intensities, dips of the turbulence signal with a duration of several nanoseconds are observed, which is interpreted as a collapse of Langmuir waves.

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Authors and Affiliations

  1. Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia

    V. V. Vasilyev, S. A. Dvoretsky, V. S. Varavin, N. N. Mikhailov, I. V. Marchishin, Yu. G. Sidorov, A. O. Suslyakov, V. N. Ovsyuk & A. L. Aseev

  2. Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia

    V. S. Burmasov, S. S. Popov & E. P. Kruglyakov

Authors
  1. V. V. Vasilyev
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  2. S. A. Dvoretsky
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  3. V. S. Varavin
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  4. N. N. Mikhailov
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  5. I. V. Marchishin
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  6. Yu. G. Sidorov
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  7. A. O. Suslyakov
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  8. V. N. Ovsyuk
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  9. V. S. Burmasov
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  10. S. S. Popov
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  11. E. P. Kruglyakov
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  12. A. L. Aseev
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Corresponding author

Correspondence to V. V. Vasilyev.

Additional information

Original Russian Text © V.V. Vasilyev, S.A. Dvoretsky, V.S. Varavin, N.N. Mikhailov, I.V. Marchishin, Yu.G. Sidorov, A.O. Suslyakov, V.N. Ovsyuk, V.S. Burmasov, S.S. Popov, E.P. Kruglyakov, A.L. Aseev, 2007, published in Avtometriya, 2007, Vol. 43, No. 4, pp. 5–16.

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Vasilyev, V.V., Dvoretsky, S.A., Varavin, V.S. et al. A microwave detector based on an MCT photodiode for subthermonuclear plasma research. Optoelectron.Instrument.Proc. 43, 299–307 (2007). https://doi.org/10.3103/S8756699007040012

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  • DOI: https://doi.org/10.3103/S8756699007040012

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