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Kilovolt radiation from a laser-produced Al plasma
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Personen und Körperschaften: | , , |
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Titel: |
Kilovolt radiation from a laser-produced Al plasma |
In: | Journal of Applied Physics, 102, 2007, 2 |
veröffentlicht: |
AIP Publishing
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ISSN: |
0021-8979 1089-7550 |
DOI: | 10.1063/1.2745246 |
Zusammenfassung: | <jats:p>We have characterized kilo-electron-volt (keV) emission from Al plasmas for various laser illuminations at the OMEGA laser with the goal of optimizing the ability to backlight low-atomic-number materials such as beryllium for fusion ignition studies. The plasma is diagnosed by spectral-measurement comparisons to detailed theoretical atomic physics models. It is found that a significant fraction of the radiation is due to the x-ray continuum, that the electron temperature Te depends weakly on laser energy and power, and that the conversion efficiency to Lyman α (Lα, the N=2→1 transition in H-like Al) at 1.73 keV is reduced as laser energy is increased. As the number of beams is increased, the extra laser energy goes into a larger, higher-density plasma in which He-like and H-like ions are more effectively ionized.</jats:p> |
Format: | E-Article |
Quelle: | AIP Publishing (CrossRef) |
Sprache: | Englisch |