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Title: Tight, Flat, Smooth, Ultrathin Metal Foils for Locating Synchrotron Beams

Abstract

It is often desired to locate a synchrotron x-ray beam precisely in space with minimal disturbance of its spatial profile and spectral content. This can be done by passing the beam through an ultrathin, flat, smooth metal foil having well-defined composition, preferably a single chemical element such as chromium, titanium or aluminum. Localized fluorescence of the foil at characteristic x-ray lines where the x-ray beam passes through the foil serves to locate the beam in two dimensions. Use of two such foils along the beam direction locates the x-ray beam spatially and identifies precisely its direction. The accuracy of determining these parameters depends in part upon high uniformity in the thickness of the foil(s), good planarity, and smoothness of the foil(s). In practice, several manufacturing steps to produce a foil must be carried out with precision. The foil must be produced on a smooth removable substrate in such a way that its thickness (or areal density) is as uniform as possible. The foil must be fastened to a support ring that maintains the foil's surface quality, and it must be then stretched onto a frame that produces the desired mirror flatness. These steps are illustrated and some of the parametersmore » specifying the quality of the resulting foils are identified.« less

Authors:
;  [1]
  1. ACF-Metals, The Arizona Carbon Foil Co., Inc., 2239 E. Kleindale Road, Tucson, Arizona 85719-2440 (United States)
Publication Date:
OSTI Identifier:
21049206
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 879; Journal Issue: 1; Conference: 9. international conference on synchrotron radiation instrumentation, Daegu (Korea, Republic of), 28 May - 2 Jun 2006; Other Information: DOI: 10.1063/1.2436250; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCURACY; ALUMINIUM; BEAM MONITORING; BEAM POSITION; CHROMIUM; DENSITY; DISTURBANCES; FLUORESCENCE; FOILS; MANUFACTURING; MIRRORS; ROUGHNESS; SUBSTRATES; SURFACES; SYNCHROTRON RADIATION; THICKNESS; THIN FILMS; TITANIUM; X RADIATION

Citation Formats

Jolivet, Connie S., and Stoner, John O. Jr. Tight, Flat, Smooth, Ultrathin Metal Foils for Locating Synchrotron Beams. United States: N. p., 2007. Web. doi:10.1063/1.2436250.
Jolivet, Connie S., & Stoner, John O. Jr. Tight, Flat, Smooth, Ultrathin Metal Foils for Locating Synchrotron Beams. United States. doi:10.1063/1.2436250.
Jolivet, Connie S., and Stoner, John O. Jr. Fri . "Tight, Flat, Smooth, Ultrathin Metal Foils for Locating Synchrotron Beams". United States. doi:10.1063/1.2436250.
@article{osti_21049206,
title = {Tight, Flat, Smooth, Ultrathin Metal Foils for Locating Synchrotron Beams},
author = {Jolivet, Connie S. and Stoner, John O. Jr.},
abstractNote = {It is often desired to locate a synchrotron x-ray beam precisely in space with minimal disturbance of its spatial profile and spectral content. This can be done by passing the beam through an ultrathin, flat, smooth metal foil having well-defined composition, preferably a single chemical element such as chromium, titanium or aluminum. Localized fluorescence of the foil at characteristic x-ray lines where the x-ray beam passes through the foil serves to locate the beam in two dimensions. Use of two such foils along the beam direction locates the x-ray beam spatially and identifies precisely its direction. The accuracy of determining these parameters depends in part upon high uniformity in the thickness of the foil(s), good planarity, and smoothness of the foil(s). In practice, several manufacturing steps to produce a foil must be carried out with precision. The foil must be produced on a smooth removable substrate in such a way that its thickness (or areal density) is as uniform as possible. The foil must be fastened to a support ring that maintains the foil's surface quality, and it must be then stretched onto a frame that produces the desired mirror flatness. These steps are illustrated and some of the parameters specifying the quality of the resulting foils are identified.},
doi = {10.1063/1.2436250},
journal = {AIP Conference Proceedings},
number = 1,
volume = 879,
place = {United States},
year = {Fri Jan 19 00:00:00 EST 2007},
month = {Fri Jan 19 00:00:00 EST 2007}
}
  • Three-dimensional gridless particle simulations of proton acceleration via irradiation of a very thin foil by a short-pulse, high-intensity laser have been performed to evaluate recently proposed microstructured target configurations. It is found that a pure proton microdot target does not by itself result in a quasimonoenergetic proton beam. Such a beam can only be produced with a very lightly doped target, in qualitative agreement with one-dimensional theory. The simulations suggest that beam quality in current experiments could be dramatically improved by choosing microdot compositions with a 5-10 times lower proton fraction.
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  • A calculation by the Monte Carlo method based on a continuous-deceleration model is performed to determine the transmission coefficients and average energy of electrons passing through vacuum-tight aluminum and titanium foils.(AIP)