Stoeckl, C. ; Bonino, M. J. ; Regan, S.P. ; Theobald, W. ; Ebert, T. ; Sander, S. ; C. Milehama, C. (2021)
Optimization of a short-pulse-driven Si He a soft x-ray backlighter.
In: High Energy Density Physics, 41
doi: 10.1016/j.hedp.2022.100973
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
High backlighter brightness is important to maximize the number of detected photons in radiography experiments and to minimize the background while backlighting high-energy-density plasmas with strong self-emission. Several different configurations were tested to improve the brightness of the Si Heα x-ray line emission at a photon energy of 1865 eV from high-energy (>1 kJ), short-pulse (∼20 ps), laser-driven backlighter targets. The emission from low-density SiO2 foam targets, the effects of a laser prepulse, and Si targets with a CH “shield” that form a small cavity were compared to solid-density, flat Si targets. The CH “shield” targets showed the best performance with a>5×improvement in time-integrated emission and an x-ray pulse duration of ∼25 ps with no measurable spectral shift of the Si Heα emission line. A conversion efficiency from laser light into Si Heα photons on the order of 1 × 10–5 was inferred from the data.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2021 |
| Autor(en): | Stoeckl, C. ; Bonino, M. J. ; Regan, S.P. ; Theobald, W. ; Ebert, T. ; Sander, S. ; C. Milehama, C. |
| Art des Eintrags: | Bibliographie |
| Titel: | Optimization of a short-pulse-driven Si He a soft x-ray backlighter |
| Sprache: | Englisch |
| Publikationsjahr: | September 2021 |
| Verlag: | Elsevier |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | High Energy Density Physics |
| Jahrgang/Volume einer Zeitschrift: | 41 |
| DOI: | 10.1016/j.hedp.2022.100973 |
| Kurzbeschreibung (Abstract): | High backlighter brightness is important to maximize the number of detected photons in radiography experiments and to minimize the background while backlighting high-energy-density plasmas with strong self-emission. Several different configurations were tested to improve the brightness of the Si Heα x-ray line emission at a photon energy of 1865 eV from high-energy (>1 kJ), short-pulse (∼20 ps), laser-driven backlighter targets. The emission from low-density SiO2 foam targets, the effects of a laser prepulse, and Si targets with a CH “shield” that form a small cavity were compared to solid-density, flat Si targets. The CH “shield” targets showed the best performance with a>5×improvement in time-integrated emission and an x-ray pulse duration of ∼25 ps with no measurable spectral shift of the Si Heα emission line. A conversion efficiency from laser light into Si Heα photons on the order of 1 × 10–5 was inferred from the data. |
| ID-Nummer: | Artikel-ID: 100973 |
| Fachbereich(e)/-gebiet(e): | Studienbereiche 05 Fachbereich Physik 05 Fachbereich Physik > Institut für Kernphysik 05 Fachbereich Physik > Institut für Kernphysik > Experimentelle Kernphysik 05 Fachbereich Physik > Institut für Kernphysik > Experimentelle Kernphysik > Laser- und Plasmaphysik |
| Hinterlegungsdatum: | 17 Jan 2022 10:03 |
| Letzte Änderung: | 22 Jul 2024 12:41 |
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