Direct photon production from hadronic sources in high-energy heavy-ion collisions

The low $p_T$ direct photon production from a variety of the hadronic sources is studied within the microscopic HSD transport approach for p+C, p+Pb and Pb+Pb collisions at 160 A GeV. The direct photon emission from elementary hadronic scatterings as well as meson-meson bremsstrahlung are incorporated. The influence of in-medium effects such as a collisional broadening of the vector-meson spectral functions on the photon emission rate is found to be hardly observable in the final spectra which are dominated by bremsstrahlung type processes. The uncertainties in the subtraction of the 'background' from the photon decay of hadronic resonances inside the hot and dense fireball is investigated, additionally. Our findings are relevant for the interpretation and extraction of experimental data on direct photon production at low $p_T$.Comment: 25 pages, 10 figures, to be published in Phys. Rev.

High energy density physics with intense ion and laser beams

We will present the status and perspectives of High Energy Density Physics (HEDP) with intense heavy ion beams as a tool to induce extreme states of matter..

The CERN laser-ion source

This paper describes the first results of a feasibility study undertaken at CERN to determine whether a laser-produced plasma can be used as a source of intense highly charged heavy ion beams. A variety of important measurements have been made, and the results are encouraging. Furthermore, a beam of highly charged light ions produced by the laser ion source has been accelerated successfully in a radio frequency quadrupole (RFQ) structur

Качество социальной рекламы: критерии оценки

Purpose: the The purpose of the publication is development of existing criterial assessment in social advertising sphere. The next objectives are provided for its achievement: to establish research methodology, to develop the author’s version of necessary notional apparatus and conceptual generalization, to determine the elements of social advertising quality, to establish the factors of its quality, to conduct the systematization of existing criteria and measuring instruments of quality assessment, to form new criteria of social advertising quality, to apply received results for development of criterial assessment to determine the further research perspectives. Methods: the methodology of research of management of social advertising interaction with target audience, which has dynamic procedural character with use of sociological knowledge multivariate paradigmatic status, has been proposed. Results: the primary received results: the multivariate paradigmatic research basis with use of works of famous domestic and foreign scientists in sociology, qualimetry and management spheres; the definitions of social advertising, its quality, sociological quality provision system, target audience behavior model during social advertising interaction are offered; the quality factors with three groups by level of effect on consumer are established; the systematization of existing quality and its measure instruments assessment criteria by detected social advertising quality elements are conducted; the two new criteria and its management quality assessment measuring instruments in social advertising sphere are developed; the one of the common groups of production quality criteria – adaptability with considering of new management quality criteria and conducted systematization of existing social advertising creative quality assessment criteria development; the perspective of further perfection of quality criterial assessment based on social advertising standartization introduction is identified. Conclusions and Relevance: the social advertising quality criterial assessment expansion on scientifically based elements of this complex notion is conducted. Significance of results that are represented in the article is in development of advertising sociology and provides further directions for research.  Цель: Целью публикации определено развитие существующей критериальной оценки в социорекламной сфере. Для ее достижения предусмотрены следующие задачи: обосновать методологию исследования, разработать авторскую версию необходимого понятийного аппарата и концептуальных обобщений, определить элементы качества социальной рекламы, обосновать факторы ее качества, провести систематизацию существующих критериев и измерительных инструментов оценки качества, сформулиро-вать новые критерии качества социальной рекламы, применить полученные результаты для развития критериальной оценки; определить перспективу дальнейшего исследования. Методология проведения работы: Предложена методология исследования управления социорекламным взаимодействием с целевой аудиторией, имеющая динамический процессуальный характер с применением многовариантного парадигматического статуса социологического знания. Результаты работы: Cформирована многовариантная парадигматическая основа исследования с применением трудов известных отечественных и зарубежных ученых в области социологии, квалиметрии и менеджменте; предложены определения социальной рекламы, ее качества, системы социологического обеспечения качества, модели поведения целевой аудитории в ходе социорекламного взаимодействия; установлены факторы качества с тремя группировками по уровню влияния на потребите-ля; проведена систематизация существующих критериев оценки качества и их измерительных инструментов по выявленным элементам качества социальной рекламы; обоснованы два новых критерия и их измерительные инструменты оценки качества управления в социорекламной сфере; развита одна из общепринятых групп критериев качества продукции – адаптируемость с учетом разработки новых критериев качества управления и проведенной систематизации существующих критериев оценки качества креатива социальной рекламы; определена перспектива дальнейшего совершенствования критериальной оценки качества на основе внедрения стандартизации социальной рекламы. Выводы: Проведено расширение критериальной оценки качества социальной рекламы по научно обоснованным элементам этого комплексного понятия. Значимость представленных в статье результатов заключается в развитии социологии рекламы и предусматривает дальнейшую перспективу исследования. 

Multiply charged ions from iodine laser-produced plasma of medium- and high-Z targets

Maximum charge states of ions registered in the far expansion zone from laser-produced plasma of Al, Co, Ni, Cu, Ta, W, Pt, Au, Pb, and Bi are presented. The Thomson parabola spectrometer was used to display a general view of the ion species of an expanding plasma while detailed ion charge-energy spectra were determined by the cylindrical electrostatic ion energy analyzer. The current densities of highly charged ion groups above 20 mA/cm2 were measured by use of an ion collector at a distance of 1 m from the target. The photodissociation iodine laser system PERUN (λ = 1.315 μm, power density up to 1015 W cm−2) was employed as a drive

Ion production by lasers using high-power densities in a near infrared region

Results are presented of experiments on ion production from Ta targets using a short pulse (350-600 ps in focus) illumination with focal power densities exceeding 1014 Wcm-2 at the wavelength of an iodine photodissociation laser (1.315 μm) and its harmonics. Strong evidence of the existence of tantalum ions with the charge state +45 near the target surface was obtained by X-ray spectroscopy methods. The particle diagnostics point to the existence of frozen high charge states (4 MeV) for the highest observed charge states. A tentative theoretical explanation of the observed anomalous charge state freezing phenomenon in the expanding plasma produced by a subnanosecond laser pulse is give

CERN PS laser ion source development

CERN, together with ITEP and TRINITI (Russia), is developing a CO2 laser ion source. The key design parameters are: 1.4 1010 ions of Pb25+ in a pulse of 5.5 ms, with a 4-rms emittance of 0.2 10-6 rad m, working at a repetition rate of 1 Hz. This device is considered as one candidate source for LHC heavy ion operation. The status of the laser development, the experimental set-up of the source consisting of the target area and its illumination, the plasma expansion area and extraction, beam transport and ion pre-acceleration by an RFQ, will be given