Experimental characterization of a strongly coupled solid density plasma generated in a short-pulse laser target interaction
We have measured high resolution copper Kα spectra from a picosecond high intensity laser produced plasma. By fitting the shape of the experimental spectra with a self-consistent-field model which includes all the relevant line shifts from multiply ionized atoms, we are able to infer time and spatia...
| Главные авторы: | , , , , , , , , , , , , , , , , , , , , |
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| Формат: | Journal article |
| Язык: | English |
| Опубликовано: |
2005
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| Итог: | We have measured high resolution copper Kα spectra from a picosecond high intensity laser produced plasma. By fitting the shape of the experimental spectra with a self-consistent-field model which includes all the relevant line shifts from multiply ionized atoms, we are able to infer time and spatially averaged electron temperatures (T e) and ionization state (Z) in the foil. Our results show increasing values for T e and Z when the overall mass of the target is reduced. In particular, we measure temperatures in excess of 200 eV with Z ∼ 13-14. For these conditions the ion-ion coupling constant is Γ ii ∼ 8-9, thus suggesting the achievement of a strongly coupled plasma regime. © 2005 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim. |
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