High voltage charge-storage diodes and their new applications

2002 ◽  
Author(s):  
S. Shinohara ◽  
H. Kobayashi ◽  
Y. Hasegawa ◽  
R. Saito
Keyword(s):  
High Voltage ◽  
Charge Storage ◽  
New Applications

1250-kilovolt scanning transmission electron microscope

1984 ◽  
Vol 42 ◽  
pp. 624-625
Author(s):  
T. Imura ◽  
S. Maruse ◽  
K. Mihama ◽  
M. Iseki ◽  
M. Hibino ◽  
...  
Keyword(s):  
High Voltage ◽  
Electron Probe ◽  
Scanning Transmission Electron Microscope ◽  
Pressure Vessels ◽  
Practical Applications ◽  
Voltage Generator ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
New Applications ◽  
High Voltage Generator

Ultra high voltage STEM has many inherent technical advantages over CTEM. These advantages include better signal detectability and signal processing capability. It is hoped that it will explore some new applications which were previously not possible. Conventional STEM (including CTEM with STEM attachment), however, has been unable to provide these inherent advantages due to insufficient performance and engineering problems. Recently we have developed a new 1250 kV STEM and completed installation at Nagoya University in Japan. It has been designed to break through conventional engineering limitations and bring about theoretical advantage in practical applications.In the design of this instrument, we exercised maximum care in providing a stable electron probe. A high voltage generator and an accelerator are housed in two separate pressure vessels and they are connected with a high voltage resistor cable.(Fig. 1) This design minimized induction generated from the high voltage generator, which is a high frequency Cockcroft-Walton type, being transmitted to the electron probe.

NONVOLATILE MEMORY TECHNOLOGY: A DRIVER TO FUTURE NANOELECTRONICS

SPIN ◽  
2012 ◽  
Vol 02 (01) ◽  
pp. 1230001 ◽  
Author(s):  
CHIH-YUAN LU
Keyword(s):  
Flash Memory ◽  
System Performance ◽  
Nonvolatile Memory ◽  
Charge Storage ◽  
Nand Flash ◽  
New Developments ◽  
Storage Solutions ◽  
Innovative Solutions ◽  
New Applications ◽  
And Storage

Flash memory has served as an important technology driver due to its many new applications. Despite the fact that NAND flash has out run lithography and other scaling barriers and thus is facing steep challenges, several innovative solutions are being developed to carry its momentum, and it continues to serve as a technology driver in the nanoelectronics era. New devices that are not based on charge storage, on the other hand, are promising to further boost system performance by offering low-power, high-density, and fast latency storage. These new developments should provide the next generation memory and storage solutions that will elevate system performance to a new level.

Research on Multi-Stage Series-Connection High-Voltage High-Power Matrix Converter

2011 ◽  
Vol 347-353 ◽  
pp. 843-847
Author(s):  
Ting Jiang ◽  
Jian Feng Jiang ◽  
Xi Jun Yang
Keyword(s):  
High Voltage ◽  
High Power ◽  
Single Phase ◽  
Frequency Converter ◽  
Charge Storage ◽  
Series Connection ◽  
Multi Stage ◽  
Three Phase ◽  
Voltage Frequency ◽  
Step Down

Charge storage is an important research topic in smart grid and distributed generation system, pumped storage as one of the most popular large-scale charge storage methods has attracted increasing attention. However, the motor generator of the pumped charge station has high input voltage and heavy load, so in order to get grid connected safely, being soft started by a high voltage converter is necessary. In the view of the existing high voltage high power converters, only the voltage source inverter Multi-stage Series-connection high voltage frequency converters are suitable for this application, and this paper gives analysis of such converters. Based on Carrier Wave Phase-Shifted modulation, this paper proposes a multi-stage Series-connection high voltage frequency converter with balanced output power of the step-down transformer’s secondary windings, in which a winding burdens three symmetry three-phase to single-phase MC outputs, and the same phase outputs of the MC are cascaded at the secondary side of the transformers, letting out one phase of high-voltage AC output. The circuit is consisted of a step-down industry frequency transformer at the network side, three-phase to single-phase MC arrays, a step-up high frequency transformer at the load side and filter components. The simulation result based on MATLAB/SIMULINK shows that the proposed multi-stage Series-connection high voltage frequency converter is feasible and low-cost.

High voltage supercapacitors based on carbon-grafted NiO nanowires interfaced with an aprotic ionic liquid

2015 ◽  
Vol 51 (28) ◽  
pp. 6092-6095 ◽  
Author(s):  
Anjali Paravannoor ◽  
Shantikumar V. Nair ◽  
Praveen Pattathil ◽  
Michele Manca ◽  
Avinash Balakrishnan
Keyword(s):  
Ionic Liquid ◽  
High Voltage ◽  
Electrochemical Capacitor ◽  
Liquid Electrolyte ◽  
Charge Storage ◽  
Preliminary Assessment ◽  
Ionic Liquid Electrolyte

The report provides a preliminary assessment of the charge storage prerogatives of an asymmetric electrochemical capacitor employing a carbon-grafted NiO electrode interfaced with 1-ethyl-3-methyl imidazoliumdicyanamide as an ionic liquid electrolyte.

A Study on Improved Characteristics of Electric Charge Storage after Thermal Treatment Using Teflon FEP Film

2007 ◽  
Vol 124-126 ◽  
pp. 319-322
Author(s):  
Seong Jun Kim ◽  
Ji Kyun Kim ◽  
Hyeon Seok Lee ◽  
Jeong Yeol Kwon ◽  
Heon Yong Lee
Keyword(s):  
Melting Point ◽  
Thermal Treatment ◽  
Corona Discharge ◽  
Electric Charge ◽  
High Voltage ◽  
Annealing Process ◽  
Charge Storage ◽  
Electrode Gap ◽  
Annealing Conditions ◽  
Improved Characteristics

In this paper, we studied the method of electrets electrode which formed to accumulate negative electric charge by corona discharge. The breakdown voltage sample and damaged sample by various corona discharges have made material stabilization and improved characteristics of electric charge storage throughout the annealing process. After the experiment made material stabilization nearly melting point by many kinds of annealing conditions, we did the corona discharge again by the charged high voltage, a discharge electrode gap, and a discharged time. As we compared it with the best condition, we confirmed that characteristics of electric charge storage were improved.

Investigation of Surface Potential Decay Behavior of Insulator Polymers after High-Voltage Poling

2014 ◽  
Vol 1042 ◽  
pp. 245-248
Author(s):  
Jia Wei Zhang ◽  
Rabah Belouadah
Keyword(s):  
Polyvinyl Chloride ◽  
Surface Potential ◽  
High Voltage ◽  
Cellular Structure ◽  
Charge Storage ◽  
Surface Charges ◽  
Storage Mechanism ◽  
Charge Storage Mechanism ◽  
Potential Decay ◽  
Decay Behavior

In order to investigate the surface potential decay tendency of the insulator polymers such as Polypropylene (PP) and Polyvinyl Chloride (PVC), the high voltage corona triode was applied to inject the charge into the surface and volume of the samples. Due to that the surface potential decay tendency is of utmost important to the investigation of space charge storage mechanism in those polymers, the decay tendency of each sample was tested and observed. The results show that the polypropylene with cellular structure can stored larger amount of the surface charges than the polyvinyl chloride. The results could be put into industrial application of insulation materials in the related fields of electrical insulation engineering.

High Voltage Electron Microscopy of Ion-Milled Dental Enamel

1974 ◽  
Vol 32 ◽  
pp. 60-61
Author(s):  
L. D. Ackerman ◽  
S. H. Y. Wei
Keyword(s):  
Electron Microscopy ◽  
High Voltage ◽  
Third Molar ◽  
Polarized Light ◽  
Dental Enamel ◽  
Longitudinal Section ◽  
Ion Milling ◽  
High Voltage Electron Microscopy ◽  
Voltage Electron ◽  
High Voltage Electron

Mature human dental enamel has presented investigators with several difficulties in ultramicrotomy of specimens for electron microscopy due to its high degree of mineralization. This study explores the possibility of combining ion-milling and high voltage electron microscopy as a means of circumventing the problems of ultramicrotomy.A longitudinal section of an extracted human third molar was ground to a thickness of about 30 um and polarized light micrographs were taken. The specimen was attached to a single hole grid and thinned by argon-ion bombardment at 15° incidence while rotating at 15 rpm. The beam current in each of two guns was 50 μA with an accelerating voltage of 4 kV. A 20 nm carbon coating was evaporated onto the specimen to prevent an electron charge from building up during electron microscopy.

Three-Dimensional Visualization of the T-System of Frog Muscle Using High Voltage Electron Microscopy and a Lanthanum Stain

1977 ◽  
Vol 35 ◽  
pp. 570-571 ◽  
Author(s):  
Lee D. Peachey ◽  
Clara Franzini-Armstrong
Keyword(s):  
Electron Microscopy ◽  
High Voltage ◽  
Three Dimensional ◽  
Biological Tissues ◽  
High Voltage Electron Microscopy ◽  
Transverse Tubular System ◽  
Peroxidase Reaction ◽  
Voltage Electron ◽  
High Voltage Electron ◽  
T System

The effective study of biological tissues in thick slices of embedded material by high voltage electron microscopy (HVEM) requires highly selective staining of those structures to be visualized so that they are not hidden or obscured by other structures in the image. A tilt pair of micrographs with subsequent stereoscopic viewing can be an important aid in three-dimensional visualization of these images, once an appropriate stain has been found. The peroxidase reaction has been used for this purpose in visualizing the T-system (transverse tubular system) of frog skeletal muscle by HVEM (1). We have found infiltration with lanthanum hydroxide to be particularly useful for three-dimensional visualization of certain aspects of the structure of the T- system in skeletal muscles of the frog. Specifically, lanthanum more completely fills the lumen of the tubules and is denser than the peroxidase reaction product.

Resolution, Contrast and Interpretation of HVEM Images of Crystals

1973 ◽  
Vol 31 ◽  
pp. 228-229
Author(s):  
L. E. Thomas ◽  
J. S. Lally ◽  
R. M. Fisher
Keyword(s):  
High Voltage ◽  
Chromatic Aberration ◽  
Crystalline Materials ◽  
Resolution Parameter ◽  
Instrument Resolution ◽  
Imaging Conditions ◽  
Beam Excitation ◽  
Optimum Imaging

In addition to improved penetration at high voltage, the characteristics of HVEM images of crystalline materials are changed markedly as a result of many-beam excitation effects. This leads to changes in optimum imaging conditions for dislocations, planar faults, precipitates and other features.Resolution - Because of longer focal lengths and correspondingly larger aberrations, the usual instrument resolution parameter, CS174 λ 374 changes by only a factor of 2 from 100 kV to 1 MV. Since 90% of this change occurs below 500 kV any improvement in “classical” resolution in the MVEM is insignificant. However, as is widely recognized, an improvement in resolution for “thick” specimens (i.e. more than 1000 Å) due to reduced chromatic aberration is very large.

Sign in / Sign up

Export Citation Format

Share Document