| Autor: |
Klaus Eidmann, George D. Tsakiris, István B. Földes, R. Sigel, W. Schwanda |
| Rok vydání: |
1994 |
| Předmět: |
|
| Zdroj: |
Journal of Quantitative Spectroscopy and Radiative Transfer. 51:77-87 |
| ISSN: |
0022-4073 |
| DOI: |
10.1016/0022-4073(94)90067-1 |
| Popis: |
Intense thermal x-rays with brightness temperatures in the range 50–100 eV have been generated in laser-irradiated high- Z targets such as plane thin converter foils or spherical micro-cavities. These x-ray sources were used to irradiate various absorber foils consisting of low- Z matter (Be, B, C and Al). The radiative heating of these materials has been studied by time-resolved spectroscopy at sub-keV photon energies. The radiative burnthrough occurring as a consequence of the transition from the cold solid state to an ionized gas has been observed. The measurements agree well with calculations of the radiation transport, for which electron impact line broadening was found to be essential. Of interest is also smoothing of the K -edge of Be and the L -edge of Al observed in the beginning of the heating when the foil is still dense and in a partially degenerate state. We also present first results on the reemission of carbon foils heated by x-rays generated in a gold micro-cavity. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
