Generation of strongly coupled plasma using Argon-based capillary discharge lasers

Andrew K. Rossall, Valentin Aslanyan, Sarah Wilson, Greg J. Tallents

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

1 Citation (Scopus)

Abstract

Argon based capillary discharge lasers operate in the extreme ultra violet (EUV) at 46.9 nm with an output of up to 0.5 mJ energy per pulse and up to a 10 Hz repetition rate. Focussed irradiances of up to 1012 W cm-2 are achievable and can be used to generate plasma in the warm dense matter regime by irradiating solid material. To model the interaction between such an EUV laser and solid material, the 2D radiative-hydrodynamic code POLLUX has been modified to include absorption via direct photo-ionisation, a super-configuration model to describe the ionisation dependant electronic configurations and a calculation of plasma refractive indices for ray tracing of the incident EUV laser radiation. A simulation study is presented, demonstrating how capillary discharge lasers of 1.2ns pulse duration can be used to generate strongly coupled plasma at close to solid density with temperatures of a few eV and energy densities up to 1×105 J cm-3. Plasmas produced by EUV laser irradiation are shown to be useful for examining the equation-of-state properties of warm dense matter. One difficulty with this technique is the reduction of the strong temperature and density gradients which are produced during the interaction. Methods to inhibit and control these gradients will be examined.

LanguageEnglish
Title of host publicationX-Ray Lasers and Coherent X-Ray Sources: Development and Applications XI
PublisherSPIE
Number of pages7
ISBN (Electronic)9781628417555
DOIs
Publication statusPublished - 22 Sep 2015
Externally publishedYes
EventX-Ray Lasers and Coherent X-Ray Sources: Development and Applications XI Conference - San Diego, United States
Duration: 9 Aug 201513 Aug 2015

Publication series

NameProceedings of SPIE
PublisherSPIE
Volume9589
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceX-Ray Lasers and Coherent X-Ray Sources
CountryUnited States
CitySan Diego
Period9/08/1513/08/15

Fingerprint

strongly coupled plasmas
Argon
ultraviolet lasers
Ultraviolet lasers
Ultraviolet
Extremes
Plasma
argon
Laser
Plasmas
Lasers
Ionization
lasers
gradients
laser materials
Gradient
configurations
ray tracing
irradiance
Photoionization

Cite this

Rossall, A. K., Aslanyan, V., Wilson, S., & Tallents, G. J. (2015). Generation of strongly coupled plasma using Argon-based capillary discharge lasers. In X-Ray Lasers and Coherent X-Ray Sources: Development and Applications XI [95890C] (Proceedings of SPIE; Vol. 9589). SPIE. https://doi.org/10.1117/12.2188009
Rossall, Andrew K. ; Aslanyan, Valentin ; Wilson, Sarah ; Tallents, Greg J. / Generation of strongly coupled plasma using Argon-based capillary discharge lasers. X-Ray Lasers and Coherent X-Ray Sources: Development and Applications XI. SPIE, 2015. (Proceedings of SPIE).
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Rossall, AK, Aslanyan, V, Wilson, S & Tallents, GJ 2015, Generation of strongly coupled plasma using Argon-based capillary discharge lasers. in X-Ray Lasers and Coherent X-Ray Sources: Development and Applications XI., 95890C, Proceedings of SPIE, vol. 9589, SPIE, X-Ray Lasers and Coherent X-Ray Sources, San Diego, United States, 9/08/15. https://doi.org/10.1117/12.2188009

Generation of strongly coupled plasma using Argon-based capillary discharge lasers. / Rossall, Andrew K.; Aslanyan, Valentin; Wilson, Sarah; Tallents, Greg J.

X-Ray Lasers and Coherent X-Ray Sources: Development and Applications XI. SPIE, 2015. 95890C (Proceedings of SPIE; Vol. 9589).

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

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T1 - Generation of strongly coupled plasma using Argon-based capillary discharge lasers

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AU - Aslanyan, Valentin

AU - Wilson, Sarah

AU - Tallents, Greg J.

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N2 - Argon based capillary discharge lasers operate in the extreme ultra violet (EUV) at 46.9 nm with an output of up to 0.5 mJ energy per pulse and up to a 10 Hz repetition rate. Focussed irradiances of up to 1012 W cm-2 are achievable and can be used to generate plasma in the warm dense matter regime by irradiating solid material. To model the interaction between such an EUV laser and solid material, the 2D radiative-hydrodynamic code POLLUX has been modified to include absorption via direct photo-ionisation, a super-configuration model to describe the ionisation dependant electronic configurations and a calculation of plasma refractive indices for ray tracing of the incident EUV laser radiation. A simulation study is presented, demonstrating how capillary discharge lasers of 1.2ns pulse duration can be used to generate strongly coupled plasma at close to solid density with temperatures of a few eV and energy densities up to 1×105 J cm-3. Plasmas produced by EUV laser irradiation are shown to be useful for examining the equation-of-state properties of warm dense matter. One difficulty with this technique is the reduction of the strong temperature and density gradients which are produced during the interaction. Methods to inhibit and control these gradients will be examined.

AB - Argon based capillary discharge lasers operate in the extreme ultra violet (EUV) at 46.9 nm with an output of up to 0.5 mJ energy per pulse and up to a 10 Hz repetition rate. Focussed irradiances of up to 1012 W cm-2 are achievable and can be used to generate plasma in the warm dense matter regime by irradiating solid material. To model the interaction between such an EUV laser and solid material, the 2D radiative-hydrodynamic code POLLUX has been modified to include absorption via direct photo-ionisation, a super-configuration model to describe the ionisation dependant electronic configurations and a calculation of plasma refractive indices for ray tracing of the incident EUV laser radiation. A simulation study is presented, demonstrating how capillary discharge lasers of 1.2ns pulse duration can be used to generate strongly coupled plasma at close to solid density with temperatures of a few eV and energy densities up to 1×105 J cm-3. Plasmas produced by EUV laser irradiation are shown to be useful for examining the equation-of-state properties of warm dense matter. One difficulty with this technique is the reduction of the strong temperature and density gradients which are produced during the interaction. Methods to inhibit and control these gradients will be examined.

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KW - High energy density physics

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BT - X-Ray Lasers and Coherent X-Ray Sources: Development and Applications XI

PB - SPIE

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Rossall AK, Aslanyan V, Wilson S, Tallents GJ. Generation of strongly coupled plasma using Argon-based capillary discharge lasers. In X-Ray Lasers and Coherent X-Ray Sources: Development and Applications XI. SPIE. 2015. 95890C. (Proceedings of SPIE). https://doi.org/10.1117/12.2188009