Spectral analysis of x-ray emission created by intense laser irradiation of copper materials

We have measured the x-ray emission, primarily from K(α),K(β), and He(α) lines, of elemental copper foil and "foam" targets irradiated with a mid-10(16) W/cm(2) laser pulse. The copper foam at 0.1 times solid density is observed to produce 50% greater He(α) line emission than copper foil,...

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Bibliographic Details
Published in:Review of scientific instruments 2012-10, Vol.83 (10), p.10E114-10E114
Main Authors: Huntington, C M, Kuranz, C C, Malamud, G, Drake, R P, Park, H-S, Maddox, B R
Format: Article
Language:English
Subjects:
ATOMIC PHYSICS
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
COPPER
Density
EMISSION
EMISSION SPECTRA
FOAMS
FOILS
INTERACTIONS
LASER RADIATION
Lasers
MATERIALS
RADIATION EFFECTS
SOLIDS
Spectral emissivity
X RADIATION
X-RAY SPECTRA
X-rays
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Summary:We have measured the x-ray emission, primarily from K(α),K(β), and He(α) lines, of elemental copper foil and "foam" targets irradiated with a mid-10(16) W/cm(2) laser pulse. The copper foam at 0.1 times solid density is observed to produce 50% greater He(α) line emission than copper foil, and the measured signal is well-fit by a sum of three synthetic spectra generated by the atomic physics code FLYCHK. Additionally, spectra from both targets reveal characteristic inner shell K(α) transitions from hot electron interaction with the bulk copper. However, only the larger-volume foam target produced significant K(β) radiation, confirming a lower bulk temperature in the higher volume sample.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.4732181