| Autor: |
Annenkov, V. I., Bel'kov, S. A., Bessarab, A. V., Bondarenko, S. V., Garanin, R. V., Kochemasov, G. G., Kovalenko, V. P., Pinegin, A. V., Suslov, N. A., Zhidkov, N. V., Annenkov, V. I., Bel'kov, S. A., Bessarab, A. V., Bondarenko, S. V., Garanin, R. V., Kochemasov, G. G., Kovalenko, V. P., Pinegin, A. V., Suslov, N. A., Zhidkov, N. V. |
| Zdroj: |
Journal de Physique IV - Proceedings; June 2006, Vol. 133 Issue: 1 p939-941, 3p |
| Abstrakt: |
Powerful iodine ISKRA-5 laser facility was upgraded and now operates on the second harmonic. Experiments were performed to measure the x-ray spectral opacity of dense plasma of different materials. Sample of material under study was fabricated as a thin plate with the 0.1-0.15 $\mu $m thickness and was heated by the soft x-rays generated by irradiation of a thin film gold converter by one beam of the ISKRA-5 laser facility. Typical laser intensity on the converter was (1-5)$ \cdot $1013W/cm2and laser pulse duration was 0.5-0.6 ns. The effective temperature of sample under experimental conditions didn't exceed 30-40 eV. The sample was tampered by ∼1 μm plastic layers on both sides to avoid its rarefaction during heating and to obtain a quasistationary layer of a dense plasma prepared to be probed by a backlighter. The backlighter was aluminum or dysprosium film irradiated by another beam of the ISKRA-5 laser facility with an intensity of 1014-1015W/cm2. Probe x-rays were registered by a Bragg spectrometer with spatial resolution. Comparison between experimental data and simulations is discussed. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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