2,040 resources related to Vacuum systems
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Main Topics1) PM, DC Machines and Drives2) Power Converters/Inverters3) Induction Machines and Drives4) Synchronous Machines and Drives5) Linear Machines and Magnetic Levitation6) Special Machines and Applications7) Renewable Energy and Related Topics8) Field Analysis and Computational Method9) Motion Control10) Fault and Diagnosis11) Designing, Manufacturing, Testing and Standards12) Transformers and High Voltage Machines13) OthersSpecial Topics1) High Speed Machine and Drives2) Personal Mobility3) EMI/EMC4) High Speed Train5) xEVs and Applications6) In-wheel Motors and Drives7) x-by-wire TechnologySpecial Topics1. High Speed Machine and Drives2. Personal Mobility3. In-wheel Motors and Drives4. x-by-wire Technology5. Electric Propulsion6. High Speed Train
The conference will provide insights into a broad spectrum of scientific issues and applications driving vacuum electronics research.
The program of the Symposium covers a wide range of scientific and technical areas including vacuum breakdown, vacuum arc physics, pulse power physics and technology, vacuum interrupters and their applications.
The conference have interdisciplinary character and is directed to improving the scientific cooperation between world scientific research centers working in the field of electrical engineering, electronics, physics, computer sciences, power generation, medical application of electronics, control systems, vacuum devices, nanotechnologies, etc.
Contains articles on the applications and other relevant technology. Electronic applications include analog and digital circuits employing thin films and active devices such as Josephson junctions. Power applications include magnet design as well asmotors, generators, and power transmission
Broad coverage of concepts and methods of the physical and engineering sciences applied in biology and medicine, ranging from formalized mathematical theory through experimental science and technological development to practical clinical applications.
Computer, the flagship publication of the IEEE Computer Society, publishes peer-reviewed technical content that covers all aspects of computer science, computer engineering, technology, and applications. Computer is a resource that practitioners, researchers, and managers can rely on to provide timely information about current research developments, trends, best practices, and changes in the profession.
Provides leading edge information that is critical to the creation of reliable electronic devices and materials, and a focus for interdisciplinary communication in the state of the art of reliability of electronic devices, and the materials used in their manufacture. It focuses on the reliability of electronic, optical, and magnetic devices, and microsystems; the materials and processes used in the ...
Electrical insulation common to the design and construction of components and equipment for use in electric and electronic circuits and distribution systems at all frequencies.
50th Annual Device Research Conference, 1992
IEEE 1991 Ultrasonics Symposium,, 1991
Ultrasonic vibration press of metal and ceramic powders using complex vibration punches under vacuum conditions is studied. Upper and lower 20 kHz longitudinal vibration compacting punches vibrating at anti-phase or in-phase mode and a vacuum compacting die are used. Using vibration punches or a vacuum die, compact density is increased over that obtained using only static pressure. Using only a ...
IEEE Transactions on Dielectrics and Electrical Insulation, 2002
This paper reports on the influence of sintering conditions on the flashover /pre-flashover characteristics of alumina insulators in vacuum under an impulse voltage. Four kinds of alumina insulator were studied, which were prepared using the same formula with different sintering conditions. The surface pre-flashover and flashover phenomena of different samples in vacuum have been observed under impulse voltage. Based on ...
Proceedings ISDEIV. 18th International Symposium on Discharges and Electrical Insulation in Vacuum (Cat. No.98CH36073), 1998
Switching conditions influence on dielectric strength of internal insulation of high-current triggered vacuum switches with a trapezoidal rod electrode system is investigated. Investigations were carried out for two switching modes. In the first mode electrode erosion occurs mainly in a vapour phase when the electrode's surface remains smooth enough after switching. In the other switching mode, drop phase of electrodes ...
2006 19th International Vacuum Nanoelectronics Conference, 2006
Summary form only given. There is an increasing interest in carbon based nanostructured materials like the nanodiamond, nanotubes, nanocluster and nanowall carbon. The interest stems from the diverse fields of application envisaged for these materials which include, vacuum microelectronics, energy storage systems, MEMS, electronics, nanotechnology and sensors. Recently, these materials including nanocrystalline diamond, nanotubes and nanocluster carbon have all been ...
Lunar Industrialization: The First Step to the Solar System
Neato Robotics' Roomba Competitor
A Robot to Mine the Moon
IMS 2011 Microapps - Calibration and Accuracy in Millimeter Systems
Harold "Bud" Lawson - IEEE Simon Ramo Medal, 2019 IEEE Honors Ceremony
A Thermodynamic Treatment of Intelligent Systems - IEEE Rebooting Computing 2017
Inside Kiva Systems - Warehouse Robots at Work
Open Systems Architecture for RF and Microwave Technologies: MicroApps 2015 - Mercury Systems
ITEC 2014: Urban Mass Transit Systems: Current Status and Future Trends
IROS TV 2019- Maryland Robotics Center, Institute for Systems Research, University of Maryland
Impact on Society: Systems Engineer to Systems Entrepreneur for Global Change - Erna Grasz at the 2017 IEEE VIC Summit
EMBC 2011-Workshop- Biological Micro Electro Mechanical Systems (BioMEMS): Fundamentals and Applications-Utkan Demirci
Rebooting Computing: Trust and Security in Future Computing Systems
Continuously Learning Neuromorphic Systems with High Biological Realism: IEEE Rebooting Computing 2017
Innovative Mechanical Systems to Address Current Robotics Challenges
Augmented Reality in Operating Rooms
EMBC 2011-Program-Systems in Synthetic Biology (Part I)-Pamela A. Silver
EMBC 2011-Keynote Lecture-Engineering Drug Dosing in Dynamic Biological Systems - David J. Balaban
Intelligent Transportation Systems Society: Changing how the world moves
Ultrasonic vibration press of metal and ceramic powders using complex vibration punches under vacuum conditions is studied. Upper and lower 20 kHz longitudinal vibration compacting punches vibrating at anti-phase or in-phase mode and a vacuum compacting die are used. Using vibration punches or a vacuum die, compact density is increased over that obtained using only static pressure. Using only a vacuum die, the increment of compact density is rather small. Using an upper and a lower vibration punch and a vacuum die simultaneously yields a larger compact density. The hardness of piezoceramics (PZT) pressed by this method was about double that without vibration and vacuum condition under a static compacting pressure of 147 MPa. This method may be also effective for other ceramics or plastic powder.<>
This paper reports on the influence of sintering conditions on the flashover /pre-flashover characteristics of alumina insulators in vacuum under an impulse voltage. Four kinds of alumina insulator were studied, which were prepared using the same formula with different sintering conditions. The surface pre-flashover and flashover phenomena of different samples in vacuum have been observed under impulse voltage. Based on the experimental results, the characteristics of pre-flashover and flashover vary with different kinds of test samples. It was found that the insulators with a higher sintering temperature had a lower flashover voltage, and more active preflashover. From a scanning electron microscope (SEM) analysis of alumina insulators, we conclude that the methods of preparing alumina samples can affect their microstructure resulting in a change in the pre-flashover and flashover performance as alumina insulators.
Switching conditions influence on dielectric strength of internal insulation of high-current triggered vacuum switches with a trapezoidal rod electrode system is investigated. Investigations were carried out for two switching modes. In the first mode electrode erosion occurs mainly in a vapour phase when the electrode's surface remains smooth enough after switching. In the other switching mode, drop phase of electrodes erosion prevailed and considerable electrode surface damage took place. It follows from experimental data statistical processing that breakdown voltage distribution is described satisfactorily with the Weibull distribution law. The influence of gap and electrode material on dielectric strength of triggered vacuum switches is considered.
Summary form only given. There is an increasing interest in carbon based nanostructured materials like the nanodiamond, nanotubes, nanocluster and nanowall carbon. The interest stems from the diverse fields of application envisaged for these materials which include, vacuum microelectronics, energy storage systems, MEMS, electronics, nanotechnology and sensors. Recently, these materials including nanocrystalline diamond, nanotubes and nanocluster carbon have all been widely reported as low field electron emitters. Most of these nanocarbons have been grown using high temperature process such as hot filament CVD, thermal CVD, microwave plasma CVD and Plasma CVD. In an effort to develop a low temperature grown carbon based field assisted electron emitters. We observe that under optimum conditions nanodiamond and nanocluster carbon based multilayered films exhibit relatively low field electron emission of 1 V/mum. Further, some of the samples seem to exhibit I-V characteristics, with a negative differential resistance region at room temperature conditions. This negative differential resistance or the resonant tunneling type behaviour was observed to be dependent on the nanoseeded diamond size and concentration for a given nanocluster carbon film. Further we observe similar behaviour in the case of thin silicon dioxide layer and carbon nanotube based multilayered electron emitters. Presented is a possible mechanism for such behaviour in these nanomaterial based multilayered devices
The primary heat transfer system (PHTS) of the ITER plant is devoted to the heat removal from different plasma facing components: the first wall, the blanket, the divertor and the vacuum vessel. The system requires a scheduled or regular maintenance that involve component checking and changing, and a special maintenance that has a non periodic nature. During the maintenance operations some shielding barrier has to be partly or completely removed and workers are likely to be exposed to an unusual radiological dose. In the present work the occupational radiation exposure (ORE) for the maintenance activities performed at the PHTS has been assessed. The problem of the activated corrosion product (ACP) transport assessment inside the coolant has been faced and solved with the computer code PACTOLE. The working procedure protocols have been taken from the fission PWR plant experience. The shielding effectiveness of the PHTS components has been evaluated with a well tested computer code. The final result presented in the work is the collective dose for regular and special maintenance at the ITER PHTS, compared with typical data coming from the PWR operational experience.
The 96 combined function magnets in the Booster Synchrotron at NAL are arranged in a 500 ft diameter ring. There are 24 periods in the magnet lattice, each containing four magnets and one 6-meter long straight section. The long straight sections provide space for rf accelerating cavities, injection, extraction, and beam detectors.
The Superconducting Super Collider (SSC) LINAC Injector is currently operating with an RF-driven volume ion source coupled with an einzel lens low energy beam transport (LEBT). The ion source, LEBT and beam diagnostics are integrated into a compact vacuum enclosure which is mounted to the upstream endwall of the Radio Frequency Quadrupole (RFQ). Beam dynamic requirements imposed a minimum longitudinal space of only 23.5 cm, thus creating a very challenging packaging problem. In addition, optimum beam matching to the RFQ specified a maximum gap of 1 cm between the LEBT and the entrance endwall face, thereby excluding the use of a bellows between the LEBT chamber and the RFQ. Vacuum system induced loads and vibrations are isolated from the beamline components by the use of a straddling support frame which is an integral component of the vacuum system/support cart. This paper will describe some of the unique aspects of the mechanical design resulting from beam requirements, high gas load, availability of the vacuum system and the need for unconstrained attachment to the RFQ. In addition, the mobile installation cart and the fully automated vacuum control system will be discussed.<<ETX>>
Vacuum-chamber breakdown and current collection experiments are performed to determine the discharge characteristics of the SPEAR I rocket experiment's high-voltage (HV) systems exposed to the space environment. Large-scale diffuse volume discharges are observed under high-vacuum conditions, regardless of the presence of an ionospheric magnetoplasma. The major difference is that in the presence of plasmas the time to breakdown is dramatically decreased. This breakdown is attributed to the simultaneous presence of magnetic fields, nonuniform electric fields, and the chamber walls. Under these conditions electrons can be E*B trapped inside the chamber, which leads to an increase in the electron-initiated breakdown. Breakdown suppression techniques utilizing low voltage grids are successfully tested and discussed.<<ETX>>
The first person to investigate solid-state effects was the German physicist Karl Ferdinand Braun. It is little known that the first solid-state devices were made much earlier, even before thermionic tubes were conceived. The selenium rectifier was the first solid-state metal diode suitable for more general power uses.
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Fabrication Assistant I
Lawrence Livermore National Laboratory
National Ignition Facility (NIF) Alignment and Diagnostics Technician
Lawrence Livermore National Laboratory