Polarization SAR system

Основная статьяA mathematical model is constructed for the dependence of the specific ESR on the slip angle for various types of X-band surfaces. A fully polarimetric radar image of a terrain site, synthesized from a three-dimensional model of the underlying surface

Detection of moving targets in SAR

Основная статьяRadar with ground moving target indication (GMTI) is intended to isolate the signals of moving targets from the whole mass of signals reflected by different objects. In this work, we investigate two approaches to form GMIT images: displaced phase center antenna algorithm (DPCA) and along-track interferometry algorithm (ATI) by using the mathematical model of SAR

Forming of precision thin-wall hollow electron beams for microwave generators

The electron gun producing the precision hollow relativistic electron beam for coherent microwave generator applications has been developed and tested. It is based on the large non-adiabatic compression of the beam emitted by ring-shaped cathode with an active surface big enough to produce a wanted current level. Further improvement of beam quality is possible by decreasing of the width of the annular emitter and increasing its emissive power

3D synthetic aperture radar image

Synthetic aperture radar (SAR) is a coherent active microwave imaging method. In remote sensing it is used for mapping the scattering properties of the Earth’s surface in the respective wavelength domain. The algorithms for the formation of 3D radar images in multi-position interferometric systems for remote sensing of the Earth are considered. Examples of reconstruction of the relief map for systems with one and two transmit antenna are presented.The work is executed at financial support of the Ministry of Education and Science of the Russian Federation, project No. 2.2226.2017/Project Part and project No. 2.9140.2017/Basic Part. The work is performed under financial support of Russian Found of Basic Research, research project No. 15-07-99514

Industrial electron accelerators type ILU

The paper describes ILU type industrial electron accelerators. Their main parameters, design, principle of action, electron beam extraction devices, wide set of auxiliary equipment for various technological processes and ways of their usage are discussed as well.Описаны промышленные ускорители электронов серии ИЛУ. Приведены основные параметры, устройство и принцип действия. Дается краткое описание систем выпуска ускоренного пучка в атмосферу для различных технологических процессов.Описано промислові прискорювачі електронів серії ЫЛП. Наведено основні параметри, будова і принцип дії. Дається короткий опис систем випуску прискореного пучку в атмосферу для різних технологічних процесів

Electron accelerator for energy up to 5.0 MeV and beam power up to 50 kW with Х-ray converter

The paper describes the industrial electron accelerator ILU-10 for electron energy up to 5 MeV and beam power up to 50 kW specially designed for use in industrial applications. The ILU-10 accelerator generates the vertical electron beam. The beam line turns the beam through an angle of 90° and transports the beam to the vertically posed Xray converter to generate the horizontal beam of X-rays.Приводиться опис прискорювача електронів ІЛУ-10 на енергію 5 МеВ потужністю 50 кВт, спеціально розробленого для таких комплексів. Для спрощення конструкції конвеєрної системи подачі оброблюваної продукції в зону опромінення використовується випускний пристрій з поворотом пучка на 90 градусів інаступною конвертацією електронного пучка в гамма-випромінювання на вертикально розташованій мішені.Приводится описание ускорителя электронов ИЛУ-10 на энергию 5 МэВ мощностью 50 кВт, специально разработанного для таких комплексов. Для упрощения конструкции конвейерной системы подачи обрабатываемой продукции в зону облучения используется выпускное устройство с поворотом пучка на 90 градусов и последующей конвертацией электронного пучка в гамма-излучение на вертикально расположенной мишени

Ground-state level spin systems within Bernasconi model

The design problem for law autocorrelation binary sequences (LABS) is a notoriously difficult computational problem which is numbered as the problem number 005 in CSPLib. In statistical physics LABS problem can be interpreted as the energy of N interacting Ising spins. This is a Bernasconi model for a one N-dimensional chain of quantum particles. Ground-state level quantum system within the frame of Bernasconi model is binary sequence with lowest level of peak-sidelobes of aperiodic autocorrelation function. The new results of an exhaustive search for optimal binary sequences with minimum peak sidelobe up to length N=86 are demonstrated. The Bernasconi model exhibits features of a glass transition like a jump in the specific heat and slow dynamics and aging. The Bernasconi model the high temperature phase of Ising spin system reproduces exactly approximation