Electron (positron) beam polarization by Compton scattering on circularly polarized laser photons

In a number of papers an attractive method of laser polarization of electrons (positrons) at storage rings or linear colliders has been proposed. We show that these suggestions are incorrect and based on errors in simulation of multiple Compton scattering and in calculation of the Compton spin-flip cross sections. We argue that the equilibrium polarization in this method is zero.Comment: 11 pages, LaTeX, talk at 9-th Intern. Workshop on Linear Colliders (LC02), Feb. 4-8, 2002, SLAC, Stanford, US

Electron beam emittance measurement at storage ring with internal target

The method for measurement of electron beam axis position and angular beam spread is developed for a storage ring with internal target. The method is based on the usage of elastic scattering of high energy electrons (positrons) circulating in a storage ring on atomic electrons of the target. If the beam has a finite emittance and the azimuth is taken from the beam axis the distribution of the azimuth angle between Bhabha scattering positron and electron has a width proportional to the beam angular spread and a mean value depending on the magnitude of the displacement of the real storage ring close orbit position from ideal one. Monte-Carlo simulation was made for the positron beam with a real angular dispersion for energy range typical for the electron-proton collider HERA. The consideration can be generalize by taking into account the positron beam and the target polarization and final state radiation. This method can be used also at electron-positron and proton-proton colliders.Развит метод измерения положения оси и углового разброса электронного пучка в накопительном кольце с внутренней газовой мишенью. Метод основан на использовании упругого рассеяния электронов (позитронов) высокой энергии, циркулирующих в накопительном кольце, на атомарных электронах мишени. Если пучок имеет конечный эмиттанс, а азимут отсчитывается от оси пучка, распределение азимутального угла рассеянными позитроном и электроном имеет ширину, пропорциональную угловому разбросу пучка, и среднюю величину, зависящую от величины смещения положения реальной замкнутой орбиты накопительного кольца относительно идеальной. Было выполнено Монте-Карло-моделирование для позитронного пучка с реальным угловым разбросом, типичным для электрон-протонного коллайдера HERA. Проведенное рассмотрение может быть распространено на случай поляризованной мишени и поляризованного позитронного пучка. Этот метод также может быть использован на электрон-позитронных и протон-протонных коллайдерах.Розвинуто метод вимірювання положення осі та кутового розкиду електронного пучка в накопичувальному кільці з внутрішньою газовою мішенню. Метод заснований на використанні пружного розсіяння електронів (позитронів) високої енергії, що циркулюють у накопичувальному кільці, на атомарних електронах мішені. Якщо пучок має кінцевий емітанс, а азимут відраховується від осі пучка, розподіл азимутального кута розсіяними позитроном та електроном має ширину, пропорційну кутовому розкиду пучка і середню величину, що залежить від величини зміщення положення реальної замкнутої орбіти накопичувального кільця щодо ідеальної. Було виконано Монте-Карло-моделювання для позитронного пучка з реальним кутовим розкидом, типовим для електрон-протонного колайдера HERA. Проведений розгляд може бути поширений на випадок поляризованої мішені і поляризованого позитронного пучка. Цей метод також може бути використаний на електрон-позитронних і протон-протонних колайдерах

Physical and mathematical foundations describing crystallization process of melt cooling on a moving wall by fourier method and Duhamel Theorem

© 2017 Trans Tech Publications, Switzerland. The process of melt crystallization of the material in a twin-roll mold is considered. An adjoin of heat conduction through variable thickness of wall "rolls wall - hard layer" with a convective heat exchange from two sides problem important for the chemical industry is solved using Fourier method and Duhamel theorem. A theoretical dependence of the thickness of a frozen layer on the physical parameters of the melt and technological parameters of the crystallization process is obtained

Generic heurorithm of innovation management from generating ideas to commercialization

The problem of providing an integrated scientific, methodological and information support of the innovation process, covering all its stages including the creative phase, at which novelties are created (solving the problem of conceptual design), is considered. The generic heurorithm (heuristic algorithm) of the innovation management serves as the methodological basis for the implementation of the information support and management innovation system. It is a standard program tool for corporative innovation infrastructure for use in universities, and is intended for describing, accounting and management of ideas at different stages of the innovation cycle. Heurorithm has a modular structure and is represented by a graphical notation systems working schemes. Its schemes reflect a variety of means to support innovation: scientific and methodological support, methods, instructional materials, information resources and a program toolkit (including components of information support and innovation management system). These means correspond to the heuristic components of activities and heuristic information facilities: weakly formalized creative processes and experience gained during their realization. Availability and detailing of heuristics generated and used at different stages of the innovation process for its intensification, is one of the main differences between the developed heurorithm and known organizational charts of innovative activity. On the basis of the generic heurorithm in the system of information support and innovation management an interactive navigator on the stages of the innovation process and means of its support is developed. The research was conducted at the financial support of the state e represented by the Ministry of Education and Science of the Russian Federation (the unique identifier of the research work RFMEFI57314X0007).peer-reviewe

Development regularities of technical systems as a means of scientific, methodological and information support of idea and innovation management

In recent decades scientists are increasingly engaged in the identification and formulation of the laws of development of machinery, technology, and products (i.e. technical systems, or TS). Regularities of the TS development represent ascertained consistent trends of incremental changes of TS operational or structural properties, leading to the improvement of their consumer qualities. The article describes the development results of scientific and methodological bases of use of the TS development patterns to search for the best ways for their further enhancement. Informational and methodological approaches are suggested to create an automated innovation management information system based on the laws and regularities of the TS development. The research was conducted at the financial support of the state represented by the Ministry of Education and Science of the Russian Federation (the unique identifier of research work RFMEFI57314X0007).peer-reviewe

Mathematical modeling of the crystallization process to obtain a fine fraction aluminates

© Published under licence by IOP Publishing Ltd. Considered process of melt crystallization of the material in a twin-roll mold. Resolved an important problem of heat conduction through the wall of variable thickness, using the Fourier method and theorem Duhamel. Obtain theoretical dependence of the thickness of a frozen layer on the physical parameters of the melt and technological parameters of the crystallization process