Quasimonochromatic x-ray source using photoabsorption-edge transition radiation

By designing transition radiators to emit x rays at the foil material's {ital K}-, {ital L}-, or {ital M}-shell photoabsorption edge, the x-ray spectrum is narrowed. The source is quasimonochromatic, directional, and intense and uses an electron beam whose energy is considerably lower than that...

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Bibliographic Details
Published in:Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 1991-04, Vol.43 (7), p.3653-3661
Main Authors: PIESTRUP, M. A, BOYERS, D. G, PINCUS, C. I, HARRIS, J. L, MARUYAMA, X. K, BERGSTROM, J. C, CAPLAN, H. S, SILZER, R. M, SKOPIK, D. M
Format: Article
Language:English
Subjects:
656003 - Condensed Matter Physics- Interactions between Beams & Condensed Matter- (1987-)
Classical and quantum physics: mechanics and fields
COLLISIONS
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
COPPER
ELECTROMAGNETIC RADIATION
ELECTRON COLLISIONS
ELEMENTS
ENERGY RANGE
Exact sciences and technology
FOILS
METALS
MEV RANGE
MEV RANGE 10-100
MEV RANGE 100-1000
Physics
RADIATION SOURCES
RADIATIONS
SPECTRA
TITANIUM
TRANSITION ELEMENTS
TRANSITION RADIATION
X-RAY EQUIPMENT
X-RAY SOURCES
X-RAY SPECTRA
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Summary:By designing transition radiators to emit x rays at the foil material's {ital K}-, {ital L}-, or {ital M}-shell photoabsorption edge, the x-ray spectrum is narrowed. The source is quasimonochromatic, directional, and intense and uses an electron beam whose energy is considerably lower than that needed for synchrotron sources. Depending upon the selection of foil material, the radiation can be produced wherever there is a photoabsorption edge. In this paper we report the results of the measurement of the x-ray spectrum from a transition radiator composed of 10 foils of 2-{mu}m titanium and exposed to low-current, 90.2-MeV electrons. The measured band of emission was from 3.2 to 5 keV. In addition, a measurment was performed of the total power from a transition radiator composed of 18 foils of 2.0-{mu}m copper exposed to a high-average-current electron beam of 40 {mu}A and at energies of 135, 172, and 200 MeV. The maximum measured power was 4.0 mW. The calculated band of emission was from 4 to 9 keV.
ISSN:1050-2947
1094-1622
DOI:10.1103/PhysRevA.43.3653