Search Results - "Ryskin, Nikita M."

Electron-Optic System With High Compression of a Multiple Elliptic Electron Beam for a Miniaturized THz-Band Vacuum Electron Device by Navrotsky, Igor A., Ryskin, Nikita M.

“…Electron-optic systems (EOSs) with high compression are required for THz-band vacuum-tube electron devices to reduce the cathode load, which is necessary to…”
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Development and Modeling of Miniaturized Traveling-Wave Tubes in Millimeter and Sub-THz Bands by Ryskin, Nikita M.

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Effect of Reflection on Mode Competition and Multi-Frequency Oscillation in a High-Power Sub-THz Gyrotron: Experimental Observation and Theoretical Analysis by Saito, Teruo, Melnikova, Maria M., Ryskin, Nikita M., Tanaka, Shunsuke, Shinbayashi, Ryuji, Yamaguchi, Yuusuke, Fukunari, Masafumi, Tatematsu, Yoshinori

“…Equi-distantly distributed multi-peak frequency spectrum was observed in a high-power 300-GHz band gyrotron for the case of strong reflection off the vacuum…”
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Design Study on a Multiple-Tunnel Meander-Line Slow-Wave Structure for a High-Power V-Band Traveling-Wave Tube by Torgashov, Roman A., Rozhnev, Andrey G., Ryskin, Nikita M.

“…Nowadays, there is a strong interest in miniature and high-power vacuum electron devices (VEDs) operating in millimeter and sub-THz bands. VED sources of…”
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Pseudospark-Driven High-Current Miniaturized Voltage-Tunable Sheet-Electron-Beam Source by Kumar, Niraj, Abhishek, Anand, Vishant, Singhal, Kushagra, Gurjar, Nikita, Jain, Sahil, Starodubov, Andrey V., Ryskin, Nikita M.

“…For high-power and compact sub-terahertz (THz) sources, a high-current electron beam is a crucial component. In this article, a miniaturized…”
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Electron-Optic System With a Converged Sheet Electron Beam for a 0.2-THz Traveling-Wave Tube by Navrotsky, Igor A., Burtsev, Anton A., Emelyanov, Valeriy V., Titov, Vladimir N., Ryskin, Nikita M.

“…This article presents the results of a design study of an electron-optic system (EOS) for a sheet-beam <inline-formula> <tex-math notation="LaTeX">{G}…”
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Meander-Line Slow-Wave Structure for High-Power Millimeter-Band Traveling-Wave Tubes With Multiple Sheet Electron Beam by Torgashov, Gennadiy V., Torgashov, Roman A., Titov, Vladimir N., Rozhnev, Andrey G., Ryskin, Nikita M.

“…For advanced telecommunications and radar systems, high-power miniaturized millimeter-band traveling-wave tubes (TWTs) are required. In this letter, we propose…”
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A Technique for Planar Integration of Components of W-Band Backward-Wave Oscillator to Eliminate Misalignment by Kumar, Niraj, Vishant, Ranjan, Om, Abhishek, Anand, Starodubov, Andrey V., Titov, Vladimir N., Ryskin, Nikita M.

“…The alignment within the required tolerance between components like electron beam source, beam-wave interaction structure and spent beam collector is a major…”
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Investigations on High-Current-Density Sheet-Beam Driven V-Band Slow Wave Oscillator With a Hollow Cathode by Torgashov, Roman A., Titov, Vladimir N., Vishant, Kumar, Niraj, Abhishek, Anand, Gurjar, Nikita, Singhal, Kushagra, Jain, S., Sharma, R. K., Ryskin, Nikita M.

“…In this article, the design approach for a <inline-formula> <tex-math notation="LaTeX">{V} </tex-math></inline-formula>-band miniaturized oscillator with a…”
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Hamiltonian description of self-consistent wave-particle dynamics in a periodic structure by André, Frédéric, Bernardi, Pierre, Ryskin, Nikita M., Doveil, Fabrice, Elskens, Yves

“…Conservation of energy and momentum in the classical theory of radiating electrons has been a challenging problem since its inception. We propose a formulation…”
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Electromagnetic Modeling of a Complex-Cavity Resonator for the 0.4-THz Second-Harmonic Frequency-Tunable Gyrotron by Melnikova, Maria M., Rozhnev, Andrey G., Ryskin, Nikita M., Tatematsu, Yoshinori, Fukunari, Masafumi, Yamaguchi, Yuusuke, Saito, Teruo

“…Complex-cavity resonator with mode conversion is a promising way of improving mode selection properties of a terahertz gyrotron. In this paper, enhancement of…”
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Recent discrete model for small-signal analysis of traveling-wave tubes by Minenna, Damien F G, Terentyuk, Artem G, André, Frédéric, Elskens, Yves, Ryskin, Nikita M

“…The numerical simulations of the wave-particle interaction, as it occurs in particular in traveling-wave tubes, require new tools especially to investigate…”
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Influence of Reflections on Frequency Tunability and Mode Competition in the Second-Harmonic THz Gyrotron by Khutoryan, Eduard M., Idehara, Toshitaka, Melnikova, Maria M., Ryskin, Nikita M., Dumbrajs, Olgierd

“…Effect of delayed reflection on operation of a second-harmonic terahertz (THz)-band gyrotron is studied. Theoretical analyses, numerical calculations, and…”
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Phase Locking and Mode Switching in a Backward-Wave Oscillator With Reflections by Ryskin, Nikita M., Titov, Vladimir N., Umantsiva, Olesya V.

“…For a relativistic backward-wave oscillator (RBWO), various nonstationary phenomena, such as irregular transients, mode competition, self-modulation, and…”
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Frequency Stabilization of a 0.67-THz Gyrotron by Self-Injection Locking by Melnikova, Maria M., Rozhnev, Andrey G., Ryskin, Nikita M., Tyshkun, Alexandra V., Glyavin, Mikhail Yu, Novozhilova, Yulia V.

“…Self-injection locking of a gyrotron by a delayed signal is considered. The results of theoretical analysis and numerical simulations explaining gyrotron…”
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Synchronization of two coupled multimode oscillators with time-delayed feedback by Emelianova, Yulia P., Emelyanov, Valeriy V., Ryskin, Nikita M.

“…•We consider two coupled oscillators with time-delayed feedback.•The mechanisms of transition from beating to synchronous regime are studied.•Periodical zones…”
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Self-Similar Character of Short Pulse Amplification and Generation by Rectilinear Electron Beams by Rostuntsova, Alena A., Ginzburg, Naum S., Ryskin, Nikita M.

“…The ultrashort, high-power microwave pulses are of interest to a number of applications, for example, for the nanosecond high-resolution radar [1]. It is known…”
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Time-Domain Particle-in-Cell Modeling of Delayed Feedback Klystron Oscillators by Emelyanov, Valeriy V., Girevoy, Ruslan A., Yakovlev, Anton V., Ryskin, Nikita M.

“…Time-domain modeling of vacuum tubes is important for theoretical analysis of spurious oscillation, amplification and generation of short pulses and complex…”
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Performance improvement of a sub-THz traveling-wave tube by using an electron optic system with a converging sheet electron beam by Ploskih, Andrey E., Ryskin, Nikita M., Burtsev, Anton A., Danilushkin, Aleksei V., Navrotsky, Igor A.

“…Many applications, such as high-data-rate wireless communications, spectroscopy, high-resolution radar, biomedical imaging, security, etc. require compact…”
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Cold Test Analysis of W-Band Planar Interaction Structure Developed Using Micro Fabrication Techniques by Jain, S., Gurjar, N., Singhal, K., Vishant, Kumar, N., Starodubov, Andrei V., Ryskin, Nikita M.

“…Vacuum integrated technology has been a favorable choice for the generation of high frequency, high power radiation source because of their ability to handle…”
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