The Influence of the Hydrodynamic Response of the Flare Plasma on the Kinetics of an Accelerated Electron Beam and Hard X-rays

Reconstructive tomography is a new technique in diagnostic radiology for imaging cross-sectional planes of the human body /1/. A collimated beam of X-rays is scanned through a thin slice of the body and the transmitted intensity is recorded by a detector giving a linear shadow graph or projection (see fig. 1). Many of these projections at different angles are used to reconstruct the body-layer, usually with the aid of a computer. The picture element size of present tomographic scanners is approximately 1.1 mm2.Micro tomography can be realized using the very fine X-ray source generated by the focused electron beam of a scanning electron microscope (see fig. 2). The translation of the X-ray source is done by a line scan of the electron beam on a polished target surface /2/. Projections at different angles are produced by rotating the object.During the registration of a single scan the electron beam is deflected in one direction only, while both deflections are operating in the display tube.

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A Color Coded STEM/SEM Image Storage System

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100097880 ◽

1981 ◽

Vol 39 ◽

pp. 272-273

Author(s):

Y. Kokubo ◽

W. H. Hardy ◽

J. Dance ◽

K. Jones

Keyword(s):

Image Processing ◽

Electron Beam ◽

Storage System ◽

Particle Analysis ◽

Specific Information ◽

X Rays ◽

Sem Image ◽

Backscattered Electrons ◽

Wide Range ◽

Scanning Electron

A color coded digital image processing is accomplished by using JEM100CX TEM SCAN and ORTEC’s LSI-11 computer based multi-channel analyzer (EEDS-II-System III) for image analysis and display. Color coding of the recorded image enables enhanced visualization of the image using mathematical techniques such as compression, gray scale expansion, gamma-processing, filtering, etc., without subjecting the sample to further electron beam irradiation once images have been stored in the memory.The powerful combination between a scanning electron microscope and computer is starting to be widely used 1) - 4) for the purpose of image processing and particle analysis. Especially, in scanning electron microscopy it is possible to get all information resulting from the interactions between the electron beam and specimen materials, by using different detectors for signals such as secondary electron, backscattered electrons, elastic scattered electrons, inelastic scattered electrons, un-scattered electrons, X-rays, etc., each of which contains specific information arising from their physical origin, study of a wide range of effects becomes possible.

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In situ study of electron beam-induced chemical vapor deposition of Au in an environmental TEM

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100137653 ◽

1995 ◽

Vol 53 ◽

pp. 256-257

Author(s):

J. Drucker ◽

R. Sharma ◽

J. Kouvetakis ◽

K.H.J. Weiss

Keyword(s):

Electron Beam ◽

Chemical Vapor Deposition ◽

Vapor Deposition ◽

Quantum Effect ◽

Line Drawing ◽

Chemical Vapor ◽

Environmental Cell ◽

Engineering Changes ◽

Kinetics Of

Patterning of metals is a key element in the fabrication of integrated microelectronics. For circuit repair and engineering changes constructive lithography, writing techniques, based on electron, ion or photon beam-induced decomposition of precursor molecule and its deposition on top of a structure have gained wide acceptance Recently, scanning probe techniques have been used for line drawing and wire growth of W on a silicon substrate for quantum effect devices. The kinetics of electron beam induced W deposition from WF6 gas has been studied by adsorbing the gas on SiO2 surface and measuring the growth in a TEM for various exposure times. Our environmental cell allows us to control not only electron exposure time but also the gas pressure flow and the temperature. We have studied the growth kinetics of Au Chemical vapor deposition (CVD), in situ, at different temperatures with/without the electron beam on highly clean Si surfaces in an environmental cell fitted inside a TEM column.

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Kinetic modelling of NO heterogeneous radiation-catalytic oxidation on the TiO2 surface in humid air under the electron beam irradiation

Nukleonika ◽

10.1515/nuka-2017-0034 ◽

2017 ◽

Vol 62 (3) ◽

pp. 235-240 ◽

Cited By ~ 2

Author(s):

Henrietta Nichipor ◽

Yongxia Sun ◽

Andrzej G. Chmielewski

Keyword(s):

Electron Beam ◽

Catalytic Oxidation ◽

Removal Efficiency ◽

Electron Beam Irradiation ◽

Kinetic Modelling ◽

Water Concentration ◽

Beam Irradiation ◽

Humid Air ◽

Kinetics Of ◽

Influential Parameters

Abstract Theoretical study of NOx removal from humid air by a hybrid system (catalyst combined with electron beam) was carried out. The purpose of this work is to study the possibility to decrease energy consumption for NOx removal. The kinetics of radiation catalytic oxidation of NO on the catalyst TiO2 surface under electron beam irradiation was elaborated. Program Scilab 5.3.0 was used for numerical simulations. Influential parameters such as inlet NO concentration, dose, gas fl ow rate, water concentration and catalyst contents that can affect NOx removal efficiency were studied. The results of calculation show that the removal efficiency of NOx might be increased by 8-16% with the presence of a catalyst in the gas irradiated field.

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Degradation kinetics of electron beam irradiated poly(propylene-co-ethylene) heterophasic copolymer

Radiation Physics and Chemistry ◽

10.1016/j.radphyschem.2011.03.013 ◽

2011 ◽

Vol 80 (7) ◽

pp. 810-816 ◽

Cited By ~ 4

Author(s):

Mojtaba Koosha ◽

Nastaran Ebrahimi ◽

Yousef Jahani ◽

Seyed Abolfazl Seyed Sajjadi

Keyword(s):

Electron Beam ◽

Degradation Kinetics ◽

Poly Propylene ◽

Kinetics Of

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Surface and Adhesive Properties of Low-Density Polyethylene after Radiation Cross-Linking

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.606.265 ◽

2014 ◽

Vol 606 ◽

pp. 265-268 ◽

Cited By ~ 3

Author(s):

Martin Bednarik ◽

David Manas ◽

Miroslav Manas ◽

Martin Ovsik ◽

Jan Navratil ◽

...

Keyword(s):

Electron Beam ◽

High Performance ◽

Chemical Properties ◽

Low Density Polyethylene ◽

Cross Linking ◽

Low Density ◽

X Rays ◽

Radiation Processing ◽

Adhesive Properties ◽

Γ Rays

Radiation cross-linking gives inexpensive commodity plastics and technical plastics the mechanical, thermal, and chemical properties of high-performance plastic. This upgrading of the plastics enables them to be used in conditions which they would not be able to with stand otherwise. The irradiation cross-linking of thermoplastic materials via electron beam or cobalt 60 (gammy rays) is performed separately, after processing. Generally, ionizing radiation includes accelerated electrons, gamma rays and X-rays. Radiation processing with an electron beam offers several distinct advantages when compared with other radiation sources, particularly γ-rays and x-rays. The process is very fast, clean and can be controlled with much precision. There is no permanent radioactivity since the machine can be switched off. In contrast to γ-rays and x-rays, the electron beam can steered relatively easily, thus allowing irradiation of a variety of physical shapes. The energy-rich beta rays trigger chemical reactions in the plastics which results in networking of molecules (comparable to the vulcanization of rubbers which has been in industrial use for so long). The energy from the rays is absorbed by the material and cleavage of chemical bonds takes place. This releases free radicals which in next phase from desired molecular bonds. This article describes the effect of radiation cross-linking on the surface and adhesive properties of low-density polyethylene.

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Investigation of the Kinetics of the SHS Process, Initiated Using Electron-Beam Technology

2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE) ◽

10.1109/efre47760.2020.9241900 ◽

2020 ◽

Author(s):

Sergey Fedorov ◽

Mikhail Kozochkin ◽

Thein Htoo Maung ◽

Enver Mustafaev

Keyword(s):

Electron Beam ◽

Kinetics Of

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Coordinate induction of metallothioneins I and II in rodent cells by UV irradiation

Molecular and Cellular Biology ◽

10.1128/mcb.8.11.4716-4720.1988 ◽

1988 ◽

Vol 8 (11) ◽

pp. 4716-4720

Author(s):

A J Fornace ◽

H Schalch ◽

I Alamo

Keyword(s):

Sequence Analysis ◽

Uv Irradiation ◽

Time Course ◽

Human Fibroblasts ◽

Chinese Hamster ◽

Cdna Clones ◽

X Rays ◽

General Stress Response ◽

Rapid Induction ◽

Kinetics Of

Sequence analysis of Chinese hamster V79 lung fibroblast cDNA clones, which code for UV radiation-inducible transcripts, revealed that many of the clones corresponded to metallothioneins (MTs) I and II. A third cDNA clone, DDIU4, was found also to code for a similar-size UV-inducible transcript which was unrelated to MT by both sequence analysis and kinetics of induction. MTI and MTII RNAs rapidly increased in V79 cells within 1 h after UV irradiation, and maximum induction was seen by 4 h. This rapid induction of MT RNA by UV irradiation was not observed in human fibroblasts. MTI and MTII were coordinately induced in both time course and dose-response experiments, although the induction of MTII, up to 30-fold, was three to four times greater than that of MTI. The induction of MT did not appear to be a general stress response, since no increase occurred after exposure to X rays or H2O2.

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