A High Precision Double Tubed Hydrostatic Leveling System for Accelerator Alignment Applications

Since 1998 several hydrostatic leveling systems (HLS) have been installed in different locations at Fermilab. This work was in collaboration with Budker Institute and SLAC. All systems were either half-filled pipe (HF) or full-filled pipe (FF). Issues assembling HLS are covered in this article. An improved and cost-effective water system with temperature stabilized of water media is presented. This proposal is a double-tube full-filled DT-FF system. Examples of hardware configurations are included for systems located at Fermilab

Hydro static water level systems at Fermilab

Several Hydrostatic Water Leveling systems (HLS) are in use at Fermilab. Three systems are used to monitor quadrupoles in the Tevatron and two systems are used to monitor ground motion for potential sites for the International Linear Collider (ILC). All systems use capacitive sensors to determine the water level of water in a pool. These pools are connected with tubing so that relative vertical shifts between sensors can be determined. There are low beta quadrupoles at the B0 and D0 interaction regions of Tevatron accelerator. These quadrupoles use BINP designed and built sensors and have a resolution of 1 micron. All regular lattice superconducting quadrupoles (a total of 204) in the Tevatron use a Fermilab designed system and have a resolution of 6 microns. Data on quadrupole motion due to quenches, changes in temperature will be presented. In addition data for ground motion for ILC studies caused by natural and cultural factors will be presented

Hydrostatic Level Sensors as High Precision Ground Motion Instrumentation for Tevatron and Other Energy Frontier Accelerators

Particle accelerators pushed the limits of our knowledge in search of the answers to most fundamental questions about micro-world and our Universe. In these pursuits, accelerators progressed to higher and higher energies and particle beam intensities as well as increasingly smaller and smaller beam sizes. As the result, modern existing and planned energy frontier accelerators demand very tight tolerances on alignment and stability of their elements: magnets, accelerating cavities, vacuum chambers, etc. In this article we describe the instruments developed for and used in such accelerators as Fermilab's Tevatron (FNAL, Batavia, IL USA) and for the studies toward an International Linear Collider (ILC). The instrumentation includes Hydrostatic Level Sensors (HLS) for very low frequency measurements. We present design features of the sensors, outline their technical parameters, describe test and calibration procedures and discuss different regimes of operation. Experimental results of the ground motion measurements with these detectors will be presented in subsequent paper

СЛУЧАЙ ОДНОМОМЕНТНОЙ ОПЕРАЦИИ ПРИ ЛЕЙОМИОСАРКОМЕ ЗАБРЮШИННОГО ПРОСТРАНСТВА И СОЛИТАРНОМ МЕТАСТАЗЕ В ЛЕГКОЕ

We present the case of a 67-year-old patient diagnosed with retroperitoneal leiomyosarcoma and solitary pulmonary metastasis. The patient underwent left lower lobectomy and retroperitoneal tumor extirpation simultaneously. This surgery resulted in good outcomes and significant shortening of the hospital stay. This case demonstrates the benefits of simultaneous surgeries for patients with retroperitoneal leiomyosarcoma and solitary pulmonary metastasis, providing the 5-year survival of 32 %. Представлено клиническое наблюдение пациентки 67 лет с лейомиосаркомой забрюшинного пространства и солитарным метастазом в легкое, которой выполнено хирургическое вмешательство в объеме расширенной нижней лобэктомии слева и комбинированной экстирпации опухоли забрюшинного пространства. Одновременный характер операции способствовал быстрой реабилитации пациентки и сократил сроки госпитализации. Данное наблюдение демонстрирует обоснованность и эффективность применения вмешательств у подобных пациентов, а удаление метастазов лейомиосарком в легкие необходимо рассматривать как неотъемлемый компонент комплексного лечения, что позволяет добиться 5-летней выживаемости у 32 % больных.

Determination of periodicity of recalculation and correction of control under conditions of uncertainty in problems of railway transport automatic control systems

Subject of investigation: railway transport dispatcher control system. Purpose of the work: development of special methods, algorithms and programs to enhance the effectiveness of operation of the automatic control system under the uncertainty conditions. The work formulates the necessary and sufficient conditions for bringing the parameters of the object beyond the stability field with regard to the index-basis. Computer systems "Vagon-1", "SPAS" and "ASUR" are developed. Systems "Vagon-1" and "ASUR" are put into practiceAvailable from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio

Application of Molecular Imprinting for Creation of Highly Selective Sorbents for Extraction and Separation of Rare-Earth Elements

The aim of the work is to study the effectiveness of a molecular imprinting technique application for the creation of highly selective macromolecular sorbents for selective sorption of light and heavy rare-earth metals (for example, samarium and gadolinium, respectively) with subsequent separation from each other. These sorbents seem to be promising due to the fact that only the target rare-earth metal will be sorbed owing to the fact that complementary cavities are formed during the synthesis of molecularly imprinted polymers. In other words, the advantage of the proposed macromolecules is the absence of accompanying sorption of metals with close chemical properties. Two types of molecularly imprinted polymers (MIP) were synthetized based on methacrylic acid (MAA) and 4-vinylpyridine (4VP) functional monomers. The sorption properties (extraction degree, exchange capacity) of the MIPs were studied. The impact of template removal cycle count (from 20 to 35) on the sorption effectivity was studied. Laboratory experiments on selective sorption and separation of samarium and gadolinium from a model solution were carried out

Application of the Remote Interaction Effect and Molecular Imprinting in Sorption of Target Ions of Rare Earth Metals

The goal of the present work is a comparative study of the effectiveness of the application of intergel systems and molecularly imprinted polymers for the selective sorption and separation of neodymium and scandium ions. The following physico-chemical methods of analysis were used in this study: colorimetry and atomic-emission spectroscopy. The functional polymers of polyacrylic acid (hPAA) and poly-4-vinylpyridine (hP4VP) in the intergel system undergo significant changes in the initial sorption properties. The remote interaction of the polymers in the intergel system hPAA–hP4VP provides mutual activation of these macromolecules, with subsequent transfer into a highly ionized state. The maximum sorption of neodymium and scandium ions is observed at molar ratios of 83%hPAA:17%hP4VP and 50%hPAA:50%hP4VP. Molecularly imprinted polymers MIP(Nd) and MIP(Sc) show good results in the sorption of Nd and Sc ions. Based on both these types of these macromolecular structures, principally new sorption methods have been developed. The method based on the application of the intergel system is cheaper and easier in application, but there is some accompanying sorption (about 10%) of another metal from the model solution during selective sorption and separation. Another method, based on the application of molecularly imprinted polymers, is more expensive and the sorption properties are higher, with the simultaneous sorption of the accompanying metal from the model solution