2022, Колодко, Д. В., Колодко, Добрыня Вячеславич, Казиев, А. В.

2017, Mamedov, N. V., Kurnaev, V. A., Sinelnikov, D. N., Kolodko, D. V., Sorokin, I. A., Мамедов, Никита Вадимович, Колодко, Добрыня Вячеславич, Синельников, Дмитрий Николаевич, Сорокин, Иван Александрович

The adsorption of water on the surface is one of the main problems in vacuum technology. Since water is a good adsorbent, its adsorption is the reason that prevents the fast pumping of vacuum systems up to ultra-high vacuum. In addition, water vapor adsorption on metal surfaces during plasma surface interaction is a problem [1]. Singly scattered and recoil ions could form narrow peaks in energy spectra and provide information about atomic composition of the first atomic layer giving information about structure and composition of the surface and very sensitivity to the first layer of atoms [2 -5]. It was also shown [6] that the thickness of light element thin layers on the heavy substrate can be analyzed with good depth resolution (~0,3nm) due to scattering of hydrogen ions with keV energies. Application of ion scattering spectroscopy at pressures up to several mTorr is presented in [7, 8]. In this work experimental results of low energy ion spectroscopy (LEIS) of W samples during water vapor adsorption are presented.

2019, Kolodko, D, V., Ageychenkov, D. G., Kaziev, A, V., Leonova, K. A., Kharkov, M. M., Tumarkin, A. V., Колодко, Добрыня Вячеславич, Агейченков, Дмитрий Григорьевич, Казиев, Андрей Викторович, Харьков, Максим Михайлович, Тумаркин, Александр Владимирович

We studied the ion fluxes on metal surfaces in the inductively coupled plasma reactor as a test facility. The gas mixture of argon and nitrogen was used, with 0.44 Pa total pressure. The radiofrequency power was varied in a wide range (250-2000 W). The ion fluxes were sampled in situ using a specially designed electrostatic extractor and then analyzed with a custom-built magnetic sector mass-separator. The gas composition was independently monitored by the quadrupole analyzer. All measurements were accompanied by optical emission spectroscopy (OES). The correlations of measured optical and corpuscular data are discussed. The conversion function linking optical and corpuscular intensities for Ar/N-2 radiofrequency discharge was determined.

2019, Kaziev, A. V., Kolodko, D. V., Ageychenkov, D. G., Tumarkin, A. V., Kharkov, M. M., Stepanova, T. V., Казиев, Андрей Викторович, Колодко, Добрыня Вячеславич, Агейченков, Дмитрий Григорьевич, Тумаркин, Александр Владимирович, Харьков, Максим Михайлович, Степанова, Татьяна Владимировна

In present contribution we report the first direct measurements of ion fluxes in a nonsputtering magnetron discharge (NSMD) with Al cathode in Ar/O-2 mixtures. The diagnostic unit comprising three-electrode electrostatic lens ion extractor, magnetic sector mass-analyzer, and a vacuum electron multiplier was calibrated and then used to record the time-resolved ion counts of Al+ and Ar+ both in NSMD and arc regimes. The results clearly indicate that in NSMD the dominant species are Ar ions while Al ion signal is lower than the sensitivity limit due to noise level, in contrast to the arc discharge. The capabilities of the diagnostics setup and its sensitivity limits are discussed.

2019, Бакун, А. Д., Гусев, А. С., Каргин, Н. И., Колодко, Д. В., Рындя, С. М., Сигловая, Н. В., Агейченков, Д. Г., Гусев, Александр Сергеевич, Колодко, Добрыня Вячеславич, Рындя, Сергей Михайлович, Каргин, Николай Иванович, Бакун, Алексей Дмитриевич, Сигловая, Наталия Владимировна

Polishing with cluster ions makes it possible to obtain nanorelief on various materials. Often in such installations, the ion mass distribution is not known reliably. This paper presents the results of a time-of-flight mass analyzer simulation. The time-of-flight analyzer will be used for separation of cluster ions on the Exogenesis nAccel 100 unit.

2019, Tumarkin, A. V., Kaziev, A, V., Leonova, K. A., Kharkov, M. M., Kolodko, D. V., Khomyakov, A. Yu., Тумаркин, Александр Владимирович, Казиев, Андрей Викторович, Харьков, Максим Михайлович, Колодко, Добрыня Вячеславич

Impulse magnetron discharge (pulse duration 20 ms) with uncooled Cr target has been investigated with a specially designed Langmuir probe setup in a wide range of parameters (magnetic field and discharge power). The spatial distributions of electron temperature and plasma density have been measured in the gasless self-sputtering mode. It has been shown that in the gasless high-power pulsed discharge with hot Cr target, plasma density is as high as 5 x 10(18) M-3 at a pulsed power density of 1430 W/cm(2), while the electron temperature drops to values below 1 eV.