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Title: Experimental study of the spatial distributions of relativistic electron beams reflected and refracted by a thin foil

Abstract

Photographs of cross sections of an electron beam scattered from thin foils have been obtained on a dosimetric film. The procession of images makes it possible to obtain the spatial distribution of particles both reflected from a foil and passed through it. The spatial distribution of electrons incident on aluminum, copper, and lead foils, as well as on bimetallic foils composed of aluminum and lead layers and of aluminum and copper layers, has been measured. The effect of the material and thickness of the foil, as well as of the angle between the initial beam trajectory and the target plane, on the spatial distribution of electrons has been studied. The effect of the sequence of the metal layers in bimetallic foils on the distribution of beams has been analyzed. A 7.4-MeV microtron has been used as a source of electrons.

Authors:
 [1];  [2]
  1. Russian Academy of Sciences, Lebedev Physical Institute (Russian Federation)
  2. National Research Nuclear University MEPhI (Moscow Engineering Physics Institute) (Russian Federation)
Publication Date:
OSTI Identifier:
22617212
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Experimental and Theoretical Physics; Journal Volume: 123; Journal Issue: 2; Other Information: Copyright (c) 2016 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ALUMINIUM; COPPER; CROSS SECTIONS; ELECTRON BEAMS; FILMS; FOILS; LAYERS; LEAD; MEV RANGE 01-10; MICROTRONS; RELATIVISTIC RANGE; SPATIAL DISTRIBUTION; THICKNESS; TRAJECTORIES

Citation Formats

Serov, A. V., E-mail: serov@x4u.lebedev.ru, and Mamonov, I. A. Experimental study of the spatial distributions of relativistic electron beams reflected and refracted by a thin foil. United States: N. p., 2016. Web. doi:10.1134/S1063776116060200.
Serov, A. V., E-mail: serov@x4u.lebedev.ru, & Mamonov, I. A. Experimental study of the spatial distributions of relativistic electron beams reflected and refracted by a thin foil. United States. doi:10.1134/S1063776116060200.
Serov, A. V., E-mail: serov@x4u.lebedev.ru, and Mamonov, I. A. Mon . "Experimental study of the spatial distributions of relativistic electron beams reflected and refracted by a thin foil". United States. doi:10.1134/S1063776116060200.
@article{osti_22617212,
title = {Experimental study of the spatial distributions of relativistic electron beams reflected and refracted by a thin foil},
author = {Serov, A. V., E-mail: serov@x4u.lebedev.ru and Mamonov, I. A.},
abstractNote = {Photographs of cross sections of an electron beam scattered from thin foils have been obtained on a dosimetric film. The procession of images makes it possible to obtain the spatial distribution of particles both reflected from a foil and passed through it. The spatial distribution of electrons incident on aluminum, copper, and lead foils, as well as on bimetallic foils composed of aluminum and lead layers and of aluminum and copper layers, has been measured. The effect of the material and thickness of the foil, as well as of the angle between the initial beam trajectory and the target plane, on the spatial distribution of electrons has been studied. The effect of the sequence of the metal layers in bimetallic foils on the distribution of beams has been analyzed. A 7.4-MeV microtron has been used as a source of electrons.},
doi = {10.1134/S1063776116060200},
journal = {Journal of Experimental and Theoretical Physics},
number = 2,
volume = 123,
place = {United States},
year = {Mon Aug 15 00:00:00 EDT 2016},
month = {Mon Aug 15 00:00:00 EDT 2016}
}
  • The scattering of electrons by aluminum, copper, and lead foils, as well as by bimetallic aluminum-lead and aluminum-copper foils, has been studied experimentally. A microtron with an energy of particles of 7.4 MeV has been used as a source of electrons. The beam of particles incident on a target at small angles is split into particles reflected from the foil, which constitute a reflected beam, and particles crossing the foil, which constitute a refracted beam. The effect of the material and thickness of the foil, as well as the angle between the initial trajectory of the beam and the planemore » of the target, on the direction of motion and the angular divergence of the beam crossing the foil and the beam reflected from the foil has been analyzed. Furthermore, the effect of the sequence of metal layers in bimetallic films on the angles of refraction and reflection of the beam has been examined.« less
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  • Refracted X-ray fluorescence (RXF) is a relatively new technique developed for studying properties of thin films. In this paper, formalism for analysis of RXF measurements is derived from a new perspective. The technique is applied to the study of thermally grown oxide scales; model predictions are tested. The evolution of chromia scales on Fe-25Cr-20Ni-0.3Y alloys and some aspects of alumina scales grown on {beta}-NiAl are investigated. Some of the data were taken in situ, during the oxidation process. Deposited films of Fe-25Cr-20Ni-0.3Y alloys of varying thickness and the oxidation of those films were also studied. The technique is generally applicablemore » to thin-film studies. It provides scale-composition and depth-profile information, scale thicknesses and growth rates, and information about transient-phase evolution.« less
  • The values of the effective scattering angle of a relativistic electron beam injected through an anode foil are analyzed by different methods in the light of reported values for various beam-plasma heating experiments. Wide variations in calculated are noted depending on the method used. It is argued that the /sup 1//sup ///sup 2/ expression corrected for Moliere screening and the (1/e) equivalent from the Monte Carlo code give nearly the same average scattering angle and one of them should be used to determine . It is also seen that a small variation in alters significantly the plasma temperature estimate.