High-current electron beams with a current density of up to 100 A/cm2 generated by a plasma-cathode gas-filled diode at low accelerating voltages are studied. Two types of gas discharges are used to produce plasma in the cathode. With glow and arc discharges, beam currents of up to 150 A and 400 A, respectively, have been obtained at an accelerating voltage of 16 kV and at a pressure of 1–3·10−2 Pa in the acceleration gap. The ions resulting from ionization of gas molecules by electrons of the beam neutralize the beam charge. The charge-neutralized electron beam almost without losses is transported over a distance of 30 cm in a drift channel which is in the axial magnetic field induced by Helmholtz coils. The results of calculations for the motion of electrons of the charge-neutralized beam with and without axial external field are presented and compared with those of experiments.

Based on the study of existing practice and specific examples of the use of innovative blockchain technology in real estate transactions and its management, the article gives the basic concepts of this technology, analyzes foreign and domestic experience of its application, examines its sphere of use in the real estate market, substantiates main advantages and shortcomings, as well as the process of various mechanisms for financing real estate transactions. It was revealed that when using the blockchain system, all real estate transactions proceed faster, safer and cheaper. Thus, the objectives of the article include studying and summarizing the Russian and foreign practices of using blockchain technology, as well as determining the main ways and options for its further development and improvement, as a highly effective and promising financial and economic mechanism for participants in real estate transactions.

The forming of accelerating voltage and current pulses with the given parameters is one of the most significant problems for creating the high-efficiency generators founded on a virtual cathode triode. The experiments have shown, that the nonlinear elements of an electrical circuit influence on the growing slope, amplitude and pulse length. One of nonlinear elements is the radiating triode. The results of theoretical investigations of the emission influence on the virtual cathode impedance and the forming of voltage and current pulses in the circuit with a inductive energy accumulator and exploding wires have been presented in this work. A model has been elaborated , including the influence of the electromagnetic adiation emission on the impedance of virtual cathode triode. The numerical simulation of the transient processes in the electrical circuit has been carried out. The dependences of the voltage and current pulses parameters, the emission efficiency , beam geometry and resonance chamber have been received.The forming of accelerating voltage and culTent pulses with the given parameters is one of the moSt significant problems for creating the high-efficiency generators founded on a virtual cathode triode. There are limiting themselves to the evaluation of the electric circuit for external feeding source as a rule at the investigation of the forming of the voltage and current pulses in a virtual cathode triode. But the complete problem solution has to include the selfconsistent radiation influence on the triode impedance and the voltage pulse.In this work the investigation of the forming of the voltage and cmTent pulses in a virtual cathode triode is carried out with taking into account the radiation influence. The inductive energy accumulators usage is considered in the high voltage sources, that gives possibility to obtain the high densities of the accumulated energy ( 0.5 -5. ) J/cm 3 at a comparatively low specific density. That is essentially higher than densities of the accumulated energy in capacitance energy accumulators. Besides capacitance energy accumulators are more complicated, unwieldly and expensive engineering installations. A prospect of the inductive energy accumulators is more obvious at using magneto-explosive generators for their feeding, what is widely discussed last time. 2.Theoretical modelThe principal elements of an electric circuit of a virtual cathode triode feeding are transformer -the energy accumulator, opening switch, a virtual cathode triode and a sharpening spark gap. Besides there are 254 SPIE Vol. 3158 • 0277-786X197/$lO.OO Downloaded From: http://proceedings.spiedigitallibrary.org/ on 06/23/2016 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx

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