Improving the Fermilab Booster Notching Efficiency, Beam Losses and Radiation Levels

Currently a fast vertical 1.08-m long kicker (notcher) located in the Fermilab Booster Long-5 straight section is used to remove 3 out of 84 circulating bunches after injection to generate an abort gap. With magnetic field of 72.5 Gauss it removes only 87% of the 3-bunch intensity at 400 MeV, with 75% loss on pole tips of the focusing Booster magnets, 11% on the Long-6 collimators, and 1% in the rest of the ring. We propose to improve the notching efficiency and reduce beam loss in the Booster by using two horizontal kickers in the Long-12 section. The STRUCT calculations show that using such horizontal notchers, one can remove up to 99% of the 3-bunch intensity at 400-700 MeV, directing 96% of it to a new beam dump at the Long-13 section. This fully decouples notching and collimation. The beam dump absorbs most of the impinging proton energy in its jaws. The latter are encapsulated into an appropriate radiation shielding that reduces impact on the machine components, personnel and environment to the tolerable levels. The MARS simulations show that corresponding prompt and residual radiation levels can be reduced ten times compared to the current ones.Comment: 4 pp. 3rd International Particle Accelerator Conference (IPAC 2012) 20-25 May 2012. New Orleans, Louisian

Luminescence of Silver Nanoclusters Formed by Ion Exchange Method in Cerium-doped and Undoped Glasses

The paper describes the research of influence of cerium ions in a silicate glass composition on the process of formation silver nanoclusters and their optical properties. Effect ion exchange time and subsequent heat treatment at temperature below transition temperature were investigated. The paper shows that in cerium-doped glasses the rate of formation of silver nanoclusters higher than in the glass without cerium. It explained by the shift of redox reaction of cerium and silver ions towards formation of atomic silver. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3524

Influence of Halides on the Luminescence of Silver Molecular Clusters in Photo-Thermo-Refractive Glasses

The luminescence spectra of silver molecular clusters in photo-thermo-refractive glasses are investigated in detail before and after the UV irradiation and also after the heat treatment of the samples. Also investigat-ed are (I) the influence of halogens such as Cl and Br in glass matrix composition on the luminescence of sil-ver molecular clusters in photo-thermo-refractive glasses and (II) the effect of temperature on the lumines-cence spectra and the integrated intensity of luminescence of photo-thermo-refractive glasses. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3524

Diagnostics of Natural Indicators of Ecological Safety of Rural Territories of the Region

Ecological safety of the territory plays an important role in the socio-economic regional welfare. The goal of the research is to define the condition of ecological safety of the Samara region, a large region of Russia. The objectives of research cover the evaluation of natural (gross and specific) environmental indicators of natural-anthropogenic environment of rural municipal areas for the period 2014-2017. Materials for the calculations were official statistics. Methods of description, comparison, mathematical analysis, logical constructions have been applied. As a result, natural and anthropogenic environmental instability, the ambiguous situation in the subregions and unresolved problems in land use, forest use, air pollution, water use, water supply and wastewater disposal, and waste management were identified. It is proposed to use the results that were obtained in strategic planning and improvement of measures to ensure sustainable development of rural areas

The Influence of Environmental Predictors on the Correlation Dependence of Population Morbidity

In this article, the authors consider environmental risk factors on direct dependence of the population morbidity of the industrial region in the Russian Federation. In terms of concept of sustainable development, the evaluation of the conditions of health and life quality is made through a set of relevant indices and indicators. The authors analyze health conditions, morbidity and mortality using statistical reporting data. The paper evaluates the condition of health and the population life quality in a comparative aspect by year and region, based on the available data of the statistical reports of the constituent entities of the Russian Federation. These factors directly or indirectly reflect the conditions of the environment, life quality, including the level of socio-economic development. As an integral evaluation, we are developing methods to reduce the impact of harmful factors on public health. As a result, we have the evaluation with subsequent ranking, according to which the strategy for further development is elaborated

Фертигация томата в открытом грунте

Obtaining high and stable yields of tomato with good consumer qualities in the open field has now become problematic due to the fact that hybrids and varieties of tomato of an intensive type place high demands on the presence of moisture and nutrients in the root-soil layer. The required level of soil moisture in combination with the introduction of calculated doses of mineral fertilizers during the growing season provides for obtaining the planned yields of vegetables, including tomato. The most important resource for the further development of agriculture in the Russian Federation is irrigated land. Volgograd region is one of the largest irrigated agricultural regions in Russia. Growing of almost all vegetables in the region is conducted on irrigated lands. The use of only one irrigation without the use of fertilizers will not have a positive impact on the growth, development and productivity of plants. Fertigation is the most effective and economical way of delivering nutrients to the plant root system and allows to get a higher yields than other methods of fertilizer application. In fertigation systems, the control of optimal concentrations of fertilizers is easily achieved, their ratio and these parameters can be controlled automatically. The purpose of this work was to study the comparative efficiency of ammonium nitrate, calcium nitrate and a combination of calcium nitrate and ammonium chloride for tomato fertigation in combination with non-root dressings of complex water-soluble fertilizers containing macroand microelements in open feild on irrigated lighchestnut soil of dry steppe zone of chestnut soils in the Volgograd region. As a result, analysis of the use of mineral fertilizers for tomato fertigation in light chestnut soils of the Volgograd region was carried out. The positive effect of foliar dressing with microelements in the proposed dosages has been proven.Современные сорта и гибриды возделываемые в открытом грунте очень требовательны к наличию влаги и питательных веществ в почве. Исследовано применение фергетации для повышения устойчивости томатов на орошаемых землях. Изучена сравнительная эффективность использования аммиачной селитры, кальциевой селитры (нитрата кальция) и комбинации кальциевой селитры и хлорида аммония для фертигации томата в сочетании с некорневыми подкормками комплексными водорастворимыми удобрениями, содержащими макрои микроэлементы, в открытом грунте на орошаемой светло-каштановой почве сухостепной зоны каштановых почв Волгоградской области. Проведен анализ использования минеральных удобрений для фертигации томата в условиях светло-каштановых почв Волгоградской области. Доказано положительное влияние листовых подкормок микроэлементами в предложенных дозировках

Work status of 5 MeV 300 kW electron accelerator

Design work has been completed for the accelerating structure of high-power electron accelerator with 5 MeV, 300 kW, 176 MHz parameters. The structure is being produced in BINP workshop. The paper presents the design of the accelerating structure which consists of a chain of coaxial cavities, and block diagram of experimental workbench. Structure of the main accelerator blocks and their degree of fabrication are viewed.Закончены проектные работы по ускоряющей структуре мощного электронного ускорителя 5 МэВ, 300 кВт, 176 МГц и ведется ее изготовление в опытном производстве Института. Дается описание конструкции ускоряющей структуры, состоящей из цепочки связанных коаксиальных резонаторов. Приводится блок-схема испытательного стенда, рассматривается устройство отдельных узлов ускорителя и состояние их готовности.Закінчено проектні роботи із прискорювальної структури потужного електронного прискорювача 5 МеВ, 300 кВт, 176 МГц і ведеться її виготовлення в дослідному виробництві інституту. Дається опис конструкції прискорювальної структури, що складається з ланцюжка зв'язаних коаксіальних резонаторів. Приводиться блок-схема іспитового стенда, розглядається будова окремих вузлів прискорювача і стан їх готовності

Measurement of the View the tt production cross-section using eμ events with b-tagged jets in pp collisions at √s = 13 TeV with the ATLAS detector

This paper describes a measurement of the inclusive top quark pair production cross-section (σtt¯) with a data sample of 3.2 fb−1 of proton–proton collisions at a centre-of-mass energy of √s = 13 TeV, collected in 2015 by the ATLAS detector at the LHC. This measurement uses events with an opposite-charge electron–muon pair in the final state. Jets containing b-quarks are tagged using an algorithm based on track impact parameters and reconstructed secondary vertices. The numbers of events with exactly one and exactly two b-tagged jets are counted and used to determine simultaneously σtt¯ and the efficiency to reconstruct and b-tag a jet from a top quark decay, thereby minimising the associated systematic uncertainties. The cross-section is measured to be: σtt¯ = 818 ± 8 (stat) ± 27 (syst) ± 19 (lumi) ± 12 (beam) pb, where the four uncertainties arise from data statistics, experimental and theoretical systematic effects, the integrated luminosity and the LHC beam energy, giving a total relative uncertainty of 4.4%. The result is consistent with theoretical QCD calculations at next-to-next-to-leading order. A fiducial measurement corresponding to the experimental acceptance of the leptons is also presented