Electromagnetic Launcher with Massive Light-Plasma Initiator

Technical Physics - The results of experiments with an initiator of lithium and graphite, whose mass was 10% of the mass of the projectile, are presented. Similar initiators produce plasma with a...     

Soot formation in isothermic pyrolysis of mixtures of various hydrocarbons

Soot formation upon the pyrolysis of binary and ternary mixtures of various hydrocarbons is studied. The experimental values of the specific surface areas S_sp of soot particles are compared to the calculated values obtained assuming that any of the hydrocarbons in the mixture are inhibitors. Analysis of the results obtained for the mixtures containing acetylene shows that, when the acetylene concentration is higher than a certain value, the nuclei of soot particles are formed from acetylene, whereas other hydrocarbons participate in     

Estimation of associated petroleum gas resource in oil production

The resource of associated petroleum gas (APG) in crude oil production in the Russian Federation is estimated on the basis of statistical data from oil-extracting companies on oil production and associated petroleum gas, as well as the structure of gas utilization. The absolute value of the APG resource across the Russian Federation is estimated on the basis of the annual weighted average value of the gas-oil ratio at the deposits.     

A mobile test facility based on a magnetic cumulative generator to study the stability of the power plants under impact of lightning currents

The report presents the results of the development and field testing of a mobile test facility based on a helical magnetic cumulative generator (MCGTF). The system is designed for full-scale modeling of lightning currents to study the safety of power plants of any type, including nuclear power plants. Advanced technologies of high-energy physics for solving both engineering and applied problems underlie this pilot project. The energy from the magnetic cumulative generator (MCG) is transferred to a high-impedance load with high efficiency of more than 50% using pulse transformer coupling. Modeling of the dynamics of the MEG that operates in a circuit with lumped parameters allows one to apply the law of inductance output during operation of the MCG, thus providing the required front of the current pulse in the load without using any switches. The results of field testing of the MCGTF are presented for both the ground loop and the model load. The ground loop generates a load resistance of 2–4 Ω. In the tests, the ohmic resistance of the model load is 10 Ω. It is shown that the current pulse parameters recorded in the resistive-inductive load are close to the calculated values.     

On quantum key distribution using ququarts

A comparative analysis of quantum key distribution protocols using qubits and ququarts as information carriers is presented. Several schemes of incoherent attacks that can be used by an eavesdropper to obtain secret information are considered. The errors induced by the eavesdropper are analyzed for several key distribution protocols.     

Quantum key distribution on biphotons-ququarts with test states

The operational inclusion of the subclass of entangled states in a quantum key distribution protocol based on biphoton-ququarts is analyzed. Four Bell states are proposed to be used as test states to estimate the error level, leaving the subclass of 12 factorized polarization states of biphotons as information states. The elementary analysis of two strategies for an attack on a quantum communication channel, as well as of the key generation rate, has been performed.

     

Characteristics of Stereoregular cis-1,4-Polyisoprene Obtained under the Conditions of a Large-Tonnage Production Process on Titanium and Lanthanide Catalysts Modified in Turbulent Flows

Russian Journal of Applied Chemistry - cis-1,4-Polyisoprene was prepared under conditions of the industrial production process using small high-performance diffuser–confuser tubular turbulent...     

Quantum key distribution on biphotons-ququarts with test states

The operational inclusion of the subclass of entangled states in a quantum key distribution protocol based on biphoton-ququarts is analyzed. Four Bell states are proposed to be used as test states to estimate the error level, leaving the subclass of 12 factorized polarization states of biphotons as information states. The elementary analysis of two strategies for an attack on a quantum communication channel, as well as of the key generation rate, has been performed.