Status of NSLS-II booster

The National Synchrotron Light Source II is a third generation light source under construction at Brookhaven National Laboratory. The project includes a highly optimized 3 GeV electron storage ring, linac pre-injector and full-energy booster-synchrotron. Budker Institute of Nuclear Physics builds booster for NSLS-II. The booster should accelerate the electron beam continuously and reliably from minimal 170 MeV injection energy to maximal energy of 3.15 GeV and average beam current of 20 mA. The booster shall be capable of multi-bunch and single bunch operation. This paper summarizes the status of NSLS-II booster.Национальный источник синхротронного излучения II является синхротроном третьего поколения, созданным в Брукхевенской национальной лаборатории. Проект включает: высокооптимизированное накопительное кольцо на 3 ГэВ, линейный ускоритель и бустерный синхротрон на полную энергию. Институт ядерной физики им. Г.И. Будкера создает бустер для NSLS-II. Бустер должен надежно и непрерывно ускорять пучок электронов от минимальной энергии инжекции 170 МэВ до максимальной энергии 3,15 ГэВ с током пучка 20 мА. Бустер должен быть способен работать в односгустковом и многосгустковом режимах. Эта статья суммирует состояние дел по бустеру для NSLS-II.Національне джерело синхротронного випромінювання II є синхротроном третього покоління, створеним у Брукхевенській національній лабораторії. Проект включає: високооптимізоване накопичувальне кільце на 3 ГеВ, лінійний прискорювач і бустерний синхротрон на повну енергію. Інститут ядерної фізики ім. Г.І. Будкера створює бустер для NSLS-II. Бустер повинен надійно і безперервно прискорювати пучок електронів від мінімальної енергії інжекції 170 МеВ до максимальної енергії 3,15 ГеВ зі струмом пучка 20 мА. Бустер повинен бути здатний працювати в односгустковому і багатосгустковому режимах. Ця стаття підсумовує стан справ по бустеру для NSLS-II

CALCULATION OF PARAMETERS OF HYDRODYNAMICALLY STABLE EARTH DUCTS

The article describes the calculation of the parameters of soil-channel channels with hydrodynamic stability. It provides formulas to calculate the width and depth of water in large channels with hydrodynamically strong earth channels using existing studies

CALCULATION OF PARAMETERS OF HYDRODYNAMICALLY STABLE EARTH DUCTS

The article describes the calculation of the parameters of soil-channel channels with hydrodynamic stability. It provides formulas to calculate the width and depth of water in large channels with hydrodynamically strong earth channels using existing studies

Calcined low-grade multimineral clays as supplementary cementitious materials: a feasibility study

© 2020, © 2020 The Korean Society of Mineral and Energy Resources Engineers (KSMER). The relevance of calcined clays as sources with great potential for low-clinker blended Portland cements has significantly increased in recent decades. This article reports on a study to evaluate the potential of the two low-grade clays containing 9.37% of montmorillonite/chlorite and 12.26% of montmorillonite/kaolinite/chlorite accompanied with 29.73% and 32.79% of calcite, respectively, as supplementary cementitious materials. The clays after thermal treatment at 800°C demonstrated poor pozzolanic activity, slight increase in the C-(S)-H and decline in the CH contents, and decrease in the mechanical properties of the blended Portland cement pastes. The results showed that the investigated clays fall below the range of the clays suitable for pozzolan production

Role of Clay Minerals Content and Calcite in Alkali Activation of Low-Grade Multimineral Clays

© 2020 American Society of Civil Engineers. The increased contribution of science-intensive clean materials and technologies to the total industrial production is one of the essential prerequisites for the future of sustainable industrial development. Chemical activation based on a nonfired or low-temperature approach for the production of cementitious materials from glassy aluminosilicates, including calcined clays, is an intensively developing and promising clean technology. This study investigated the potential of calcined clays as precursors of alkali-activated cements (AACs) by considering three types of low-grade multimineral clays (with a clay mineral content of <20%). The alkali activation of the calcined clays was analyzed based on the type and content of clay minerals, presence of calcite, calcination temperature, type of alkali activator, and curing conditions. The results indicated that clays containing 20% of 21 layer lattice clay minerals are not suitable as precursors of AACs, while those containing 9%-12% of 11 and/or 21 layer lattice minerals combined with 29%-32% calcite lead to hardened pastes displaying compressive strengths of up to 12.4 MPa after 2 days and 20 MPa after 28 days and after steam curing. The reaction products of 6M NaOH-activated systems determined by XRD, TG/DSC, and FTIR spectroscopy analyses were X-ray amorphous binder gel, calcite (CaCO3), clinozoisite (Ca2Al3(SiO4)(Si2O7)(O,OH)), and gaylussite (CaNa2(CO3)(H2O)5)

Phase formation during firing of elevated-basicity SSGPO pellets

26.00; Translated from Russian (Stal' 1987 (11) p. 17-20)Available from British Library Document Supply Centre- DSC:9022.06(BISI-Trans--26568)T / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo