Diagnosis of radiation heating in iron buried layer targets

M. Shahzad, G. J. Tallents, O. Culfa, A. K. Rossall, L. A. Wilson, S. J. Rose, O. Guilbaud, S. Kazamias, M. Pittman, K. Cassou, J. Demailly, O. Delmas, A. Mestrallain, M. Farjardo, D. Ros

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Extreme ultra-violet (EUV) laboratory lasers can be used to probe energy transport in laser irradiated solid targets. We report on a recent experiment undertaken at LASERIX whereby the heating of laser-irradiated targets containing a thin layer of iron (50 nm) encased in plastic (CH) was diagnosed using EUV laser (13.9 nm) back-lighter probing. The heating laser pulse duration was 35 fs with focal irradiances of 3 × 1016 Wcm−2 and a deliberate prepulse 20 ps before the main pulse at irradiances of 3 × 1015 Wcm−2. A one dimensional hydrodynamic fluid code HYADES has been used to simulate the temporal variation in EUV transmission using IMP opacity values for the iron layer and the simulated transmissions compared to measured transmission values. When a deliberate prepulse is used to preform an expanding plastic plasma, it is found that radiation heating is dominant in the heating of the iron layer giving rise to a rapid decrease in EUV opacity and an increase in the transmission of the 13.9 nm laser radiation as the iron ionizes to Fe5 + and above.

Original languageEnglish
Title of host publicationProceedings of the 14th International Conference on X-Ray Lasers
Subtitle of host publicationX-Ray Lasers 2014
PublisherSpringer Science and Business Media, LLC
Pages411-416
Number of pages6
Volume169
ISBN (Print)9783319195209
DOIs
Publication statusPublished - 2016
Externally publishedYes
Event14th International Conference on X-Ray Lasers - Fort Collins, United States
Duration: 26 May 201430 May 2014

Conference

Conference14th International Conference on X-Ray Lasers
Abbreviated titleICXRL 2014
CountryUnited States
CityFort Collins
Period26/05/1430/05/14

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Shahzad, M., Tallents, G. J., Culfa, O., Rossall, A. K., Wilson, L. A., Rose, S. J., ... Ros, D. (2016). Diagnosis of radiation heating in iron buried layer targets. In Proceedings of the 14th International Conference on X-Ray Lasers: X-Ray Lasers 2014 (Vol. 169, pp. 411-416). Springer Science and Business Media, LLC. https://doi.org/10.1007/978-3-319-19521-6_54