External electro-optic measuring system with high spatial resolution and high voltage sensitivity by using an electro-optic solid immersion probe

2001 ◽  
Vol 34 (20) ◽  
pp. 3078-3082 ◽  
Author(s):  
Chen Zhanguo ◽  
Jia Gang ◽  
Yi Maobin
Keyword(s):  
Spatial Resolution ◽  
High Voltage ◽  
High Spatial Resolution ◽  
Measuring System ◽  
Voltage Sensitivity ◽  
Electro Optic

Low Voltage X-Ray Microanalysis of Bulk Bio-Organic Samples

1998 ◽  
Vol 4 (S2) ◽  
pp. 190-191
Author(s):  
Patrick Echlin
Keyword(s):  
High Resolution ◽  
Field Emission ◽  
Spatial Resolution ◽  
High Voltage ◽  
Biological Material ◽  
High Spatial Resolution ◽  
Low Voltage ◽  
Similar Type ◽  
The Other ◽  
X Ray

Although high resolution (2nm), low voltage (lkV), SEM of bio-organic materials can now be performed more or less routinely using instruments fitted with a field emission source, virtually no low voltage x-ray microanalysis has been carried out on this type of specimen. Boyes and Nockolds showed that quantitative microanalytical information could be obtained from polished inorganic samples at a spatial resolution of l00nm at 5kV and Johnson et al obtained similar type of data at a spatial resolution of 150nm at 3kV. High spatial resolution (l0nm) microanalysis can be achieved in frozen dried or chemically compromised sections of biological material examined at high voltage in the TEM but frozen hydrated chemically unfixed sections are damaged. The other approach is to use the SEM with frozen hydrated, chemically uncompromised samples, usually at about 10-15kV, in order to obtain sufficient signal from the elements of interest which typically lie in the range Na (Z=l 1) to Ca (Z=20).

Electro-optic measurement system with high spatial resolution utilizing poled polymer film as external probe tip

2005 ◽  
Vol 37 (5) ◽  
pp. 410-415 ◽  
Author(s):  
Hongfei Liu ◽  
Maobin Yi ◽  
Hongbo Zhang ◽  
Alin Hou ◽  
Xiaohong Chuai ◽  
...  
Keyword(s):  
Polymer Film ◽  
Spatial Resolution ◽  
Measurement System ◽  
High Spatial Resolution ◽  
Poled Polymer ◽  
Electro Optic

scholarly journals CO2-Tea pulse clipping using pulsed high voltage preionization for high spatial resolution I.R. Lidar systems

2018 ◽  
Vol 176 ◽  
pp. 01007
Author(s):  
Taieb Gasmi
Keyword(s):  
Laser Pulse ◽  
Attenuation Coefficient ◽  
Spatial Resolution ◽  
High Voltage ◽  
Pulse Width ◽  
High Spatial Resolution ◽  
Ionized Gas ◽  
Complete Extinction ◽  
Atmospheric Monitoring ◽  
Range Resolution

An extra-cavity CO2-TEA laser pulse clipper for high spatial resolution atmospheric monitoring is presented. The clipper uses pulsed high voltageto facilitate the breakdown of the gas within the clipper cell. Complete extinction of the nitrogen tail, that degrades the range resolution of LIDARS, is obtained at pressures from 375 up to 1500 Torr for nitrogen and argon gases whereas an attenuation coefficient of almost 102 is achieved for helium. Excellent energy stability and pulse width repeatability were achieved using high voltage pre-ionized gas technique.

High-finesse Fabry-Perot electro-optic sensors with enhanced sensitivity and high spatial resolution

2007 ◽  
Vol 46 (11) ◽  
pp. 2001 ◽  
Author(s):  
Gwenaël Gaborit ◽  
Guillermo Martin ◽  
Jean-Louis Coutaz ◽  
Lionel Duvillaret ◽  
Samir Kassi ◽  
...  
Keyword(s):  
Spatial Resolution ◽  
High Spatial Resolution ◽  
Enhanced Sensitivity ◽  
Electro Optic ◽  
Fabry Perot ◽  
High Finesse

High spatial resolution AEM observations of yttrium segregation in chromia scales grown on Co-45%Cr

1986 ◽  
Vol 44 ◽  
pp. 518-519
Author(s):  
K. Przybylski ◽  
A. J. Garratt-Reed ◽  
G. J. Yurek
Keyword(s):  
Spatial Resolution ◽  
Outer Surface ◽  
Maximum Concentration ◽  
High Spatial Resolution ◽  
Reactive Elements ◽  
Chromia Scales

The addition of so-called “reactive” elements such as yttrium to alloys is known to enhance the protective nature of Cr2O3 or Al2O3 scales. However, the mechanism by which this enhancement is achieved remains unclear. An A.E.M. study has been performed of scales grown at 1000°C for 25 hr. in pure O2 on Co-45%Cr implanted at 70 keV with 2x1016 atoms/cm2 of yttrium. In the unoxidized alloys it was calculated that the maximum concentration of Y was 13.9 wt% at a depth of about 17 nm. SIMS results showed that in the scale the yttrium remained near the outer surface.

Integration of Core-Edge Spectroscopy Methods for the Study of Polymers

1996 ◽  
Vol 54 ◽  
pp. 154-155
Author(s):  
E. G. Rightor
Keyword(s):  
Excited State ◽  
Polymer Blends ◽  
Gas Phase ◽  
Spatial Resolution ◽  
High Spatial Resolution ◽  
Electronic States ◽  
Core Electron ◽  
Bulk Solids ◽  
Development Application

Core edge spectroscopy methods are versatile tools for investigating a wide variety of materials. They can be used to probe the electronic states of materials in bulk solids, on surfaces, or in the gas phase. This family of methods involves promoting an inner shell (core) electron to an excited state and recording either the primary excitation or secondary decay of the excited state. The techniques are complimentary and have different strengths and limitations for studying challenging aspects of materials. The need to identify components in polymers or polymer blends at high spatial resolution has driven development, application, and integration of results from several of these methods.

High-voltage monitoring by the fiber-optic recirculating measuring system

2020 ◽  
pp. 38-44
Author(s):  
A. V. Polyakov ◽  
M. A. Ksenofontov
Keyword(s):  
Optical Fibers ◽  
High Voltage ◽  
Optical Sensors ◽  
Electromagnetic Interference ◽  
Fiber Optic ◽  
Electric Power Industry ◽  
Measuring System ◽  
Voltage Range ◽  
External Electromagnetic Fields ◽  
Optic Communication

Optical technologies for measuring electrical quantities attract great attention due to their unique properties and significant advantages over other technologies used in high-voltage electric power industry: the use of optical fibers ensures high stability of measuring equipment to electromagnetic interference and galvanic isolation of high-voltage sensors; external electromagnetic fields do not influence the data transmitted from optical sensors via fiber-optic communication lines; problems associated with ground loops are eliminated, there are no side electromagnetic radiation and crosstalk between the channels. The structure and operation principle of a quasi-distributed fiber-optic high-voltage monitoring system is presented. The sensitive element is a combination of a piezo-ceramic tube with an optical fiber wound around it. The device uses reverse transverse piezoelectric effect. The measurement principle is based on recording the change in the recirculation frequency under the applied voltage influence. When the measuring sections are arranged in ascending order of the measured effective voltages relative to the receiving-transmitting unit, a relative resolution of 0,3–0,45 % is achieved for the PZT-5H and 0,8–1,2 % for the PZT-4 in the voltage range 20–150 kV.

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