The local electron temperature measurements with the double electric probe in the compression zone are presented. Electric probes make it possible to measure the electron temperature with a reasonably good spatial resolution. Double electric probe application for electron temperature measurements in the dense self-compressed plasma stream is discussed. We have shown experimentally that the electric probe operates in a diffusion regime.
The paper is devoted to experimental measurements and analysis of parameters of the plasma streams generated by magnetoplasma compressor (MPC) upgraded with an external axial magnetic field. Influence of the external axial magnetic field of 0.24 T on helium plasma streams (P=2 Torr) has been studied. The measurements of average electron density distributions were performedboth with and without an external axial B-field. Distributions of plasma electron density Ne (L) were measured with spectroscopy in the plasma stream and in the compression zone using Stark broadening of He I and He II spectral lines. Plasma-surface interaction processes were also analyzed.
The synergistic effects of tungsten exposure to combined hydrogen and helium particle fluxes as well as transient thermal loads need to be extensively studied for implementation of fusion reactor project. The mixture of hydrogen and helium was used as the working gas for plasma stream generation within the QSPA-M accelerator. The parameters
of the mixed hydrogen and helium plasma were similar to those of pure hydrogen plasma generated in QSPA-M. It was shown that the small addition of helium (5 %) to hydrogen does not strongly influence plasma surface interaction. The influence of the external magnetic field on plasma surface interaction is also discussed.
The formation of the current-sheet-like structure under the influence of the external magnetic field in pinching plasma flows generated by the magnetoplasma compressor has been studied. A set of magnetic and electric probes were used to measure the self-generated magnetic field, electron temperature, and electric field locally with sufficiently high temporal and spatial resolution. The data obtained from the probe measurements were used to plot the spatial distributions of electric current and drift velocity in the plasma stream to identify the patterns of plasma flow. In the presence of external magnetic field, the current density, electron temperature, and the ion saturation current reach a peak in close proximity to the sheet. Measurements indicate the outflow of two electron jets of different temperatures from the layer.
This paper reports the findings of our recent experiments on the evaluation of the external axial magnetic field effect on the discharge parameters of a magnetoplasma compressor (MPC). The discharge-voltage characteristics were obtained for varied magnitudes of an external axial magnetic field produced by a solenoid installed on the accelerating channel. Present experiments were carried out with helium (at the initial pressures of 2 and 10 Torr) and argon (at the initial pressure of 1 Torr) as working gases at different initial voltages. The external magnetic field varied up to 0.4 T. The discharge-voltage characteristics can be altered by the magnitude of the external magnetic field, as well as by the geometrical properties of an accelerating channel.
The influence of the external axial magnetic field on pinching plasma flows generated by a magnetoplasma compressor (MPC) has been studied using magnetic and electric probes. In the presence of an external magnetic field, temperature measurements show two groups of electrons with different temperatures near the plasma stream core. The external magnetic field leads to a noticeable increase in the electric current in the plasma stream, electron temperature, and the formation of the current-sheet-like structure observed in the MPC for the first time.
Today, Ukraine is undergoing a complex process of reforming socio-economic systems towards the development of a successful country. However, modern realities do not always meet economic requirements and provide opportunities to accelerate this pace. Therefore, a fundamentally new model of economic development in the context of globalization is needed. The introduction of the concept of sustainable development will allow for fundamental transformations in all spheres of society. After all, sustainable development is the new paradigm that will change the attitude to the environmental consciousness of enterprises. It should be noted that the concept of sustainable development provides for innovative and efficient use of natural resources, which will ensure a decent standard of living not only for present but also for future generations. Sustainable development provides updated guidelines for combining the three main components of the concept in the enterprise. Their balanced complex at the enterprise will help to increase the level of competitiveness of this enterprise. Therefore, as is already clear, it is necessary to implement the principles of sustainable development in the enterprise. It should be noted that the study of the concept of sustainable development, clarifying the basic components of the concept of sustainable development, the implementation of the principles of sustainable development in the enterprise is a very important topic for scientists. However, in general, scholars focus more on the above issues at the global and national economies. Nevertheless, scientists are engaged in questions of sustainable development at the enterprise. Insufficient study of the basic principles of sustainable development of economic activity of enterprises and contributed to this study. The article points to the need to introduce sustainable development in the enterprise, the positive aspects of implementing the concept of sustainable development in the enterprise. The study examines the basic principles of sustainable development of economic activity of the enterprise. After all, the implementation of the principles and conduct of economic activity based on sustainability will help the company to build a new model of strategic development.
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