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.

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.

2020, Mamedov, N. V., Mamedov, I. M., Мамедов, Никита Вадимович

© 2020, Allerton Press, Inc.Abstract: A simple way of estimating the probability of helium ions He+ surviving when reflected from different metal surfaces is described that employs modeling with the SCATTER and TRIM binary collision codes. The probability of reflected helium ions surviving is estimated from their energy spectra, in the form of the ratio of their areas. The dependences of the probability of He+ ions reflected from Cu and Al surviving on the reciprocal perpendicular velocity are calculated, and the characteristic velocity of an electron migrating from a metal to an incident ion is estimated.

2021, Rohmanenkov, A. S., Solodovnikov, A. A., Mamedov, N. V., Мамедов, Никита Вадимович

© 2021 Institute of Physics Publishing. All rights reserved.In this work characteristics of pulsed penning ion source for miniature linear accelerators was investigated by experimental measurements and PIC (Particle-In-Cell) simulations. The paper presents dependences of the discharge current and extracted current on intensities of the uniform magnetic field for different pressure. Also, typical examples of the current pulse waveforms obtained by PIC simulation and experiment for different magnetic field are presented. The simulated electron and ion distributions inside discharge gap give qualitative explanation of the experimentally observed fluctuations in current pulses. These current fluctuations arise as a result of the violation of the electric field axial symmetry due to the electron spoke movement of the towards the anode.

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.