2020, Solodovnikov, A. A., Mamedov, N. V., Maslennikov, S. P., Yurkov, D. I., Мамедов, Никита Вадимович, Масленников, Сергей Павлович, Юрков, Дмитрий Игоревич

© 2020, Pleiades Publishing, Ltd.Abstract: For a Penning ion generator, the dependences of the amplitude–time characteristics of the discharge current and the extracted current on the intensity and configuration of the magnetic field are studied in a regime with pulsed voltage on the anode.

2019, Rachkov, R. S., Maslennikov, S. P., Yurkov, D. I., Масленников, Сергей Павлович, Юрков, Дмитрий Игоревич

© 2019, Springer Science+Business Media, LLC, part of Springer Nature.Ion sources based on Penning discharge cells are now widely used in small-size pulsed neutron generators of geophysical well-logging apparatus. The operating efficiency of the apparatus is associated with the amplitude and time parameters of the neutron pulse of the generator, which depend on the gas pressure, geometry of the electrode systems, and other factors. Therefore it is necessary to investigate Penning discharge regimes in the context of control and regulation of the working gas (hydrogen) pressure as well as to measure the amplitude-time characteristics of the discharge as a function of the periodic-pulse power supply parameters. The stable discharge ignition regimes in the ion source were determined experimentally, and it was shown that different discharge regimes exist. The operating regimes of ion sources with a descending voltage dependence of the discharge current were revealed at heightened gas pressure.

2022, Maslennikov, S. P., Mamedov, I. M., Масленников, Сергей Павлович

2023, Dekopov, A. S., Lukyanov, A. A., Maslennikov, S. P., Mikhailov, S. V., Масленников, Сергей Павлович

2019, Morev, S., Kuzmich, K., Sahlin, V., Darmaev, A., Maslennikov, S., Масленников, Сергей Павлович

© 2019 IEEE.The experimental study results of the coarse-structured field emission cathode cell with a tungsten emitter intended for millimeter range O-type device are presented. The propagation of an electron beam formed by a single-row nine-beam field emission cathode array in long rectangular (0.9 mm x 8.0 mm) beam channel is shown.

2019, Komarov, D. A., Maslennikov, S. P., Масленников, Сергей Павлович

© 2019, Pleiades Publishing, Inc. Abstract: A solid-state pulse modulator for high-power microwave devices with grid control has been designed and tested. The output stage of this modulator uses a switching unit with two microsecond-band high-voltage switches toggled in antiphase. These switches were constructed on series-connected MOS transistors, have nanosecond switching times, and operate at voltages of as high as 10 kV. The modulator has demonstrated stable operation in tests performed to evaluate its potential to control high-power microwave devices.

2010, Масленников, С. П., Масленников, Сергей Павлович

2019, Mamedov, N.V., Rohmanenkov, A.S., Zverev, V.I., Maslennikov, S.P., Yurkov, D.I., Мамедов, Никита Вадимович, Зверев, Владимир Игоревич, Масленников, Сергей Павлович, Юрков, Дмитрий Игоревич

In the present work, the results of the experimental and particle in cell (PIC) simulation studies of the discharge combustion modes in a miniature Penning ion source (PIS) under the pulse-periodic power supply conditions are presented. Dynamics of discharge ignition and discharge operation mode at a pulsed anode voltage supply are investigated for different values of anode voltage and gas pressure in various magnetic field configurations. Typical examples of current pulse waveforms are shown. Also, numerical simulations of the PIS were performed using 3D PIC combined with Monte Carlo collisions in the code VSim. Temporal dependencies of electron, ion, and potential distributions in the Penning cell are simulated. Differences between the numerical and experimental results are discussed. Published under license by AIP Publishing.

2022, Maslennikov, S. P., Mamedov, I. M., Масленников, Сергей Павлович

Abstract: In this paper, we consider pulsing operation modes of small-sized Penning ion sources with control parameters required for well-logging equipment. The results of studies of the generation modes of a pulsed Penning discharge, the formation of ion fluxes depending on the duty cycle of the supply pulses, the amplitude of the discharge current, as well as under conditions of batch-pulse control, are presented. The stability of Penning discharge generation under conditions of wide tuning of the control system parameters is shown to be affected by the amplitude–time characteristics of the anode voltage pulses and the zero-level potential in the pauses between pulses. © 2022, Pleiades Publishing, Inc.

2020, Rohmanenkov, A., Solodovnikov, A., Mamedov, N., Maslennikov, S., Sorokin, I., Kolodko, D., Мамедов, Никита Вадимович, Масленников, Сергей Павлович, Сорокин, Иван Александрович, Колодко, Добрыня Вячеславич

© 2020 IEEE.The paper presents the results of experiments and PIC (particle-in-cell) simulations of ignition characteristics of miniature pulsed penning ion source. Also the dependence of the discharge current pulse on the gas pressure and magnetic field are presented. Plasma behavior (electron and ion density in axial and radial dimensional) depending on magnitude (and configuration) of the magnetic field and pressure (working gas is deuterium) was shown.