Measurement and simulation of the temperature evolution of a short pulse laser heated buried layer target

Marley, E. V.; Shepherd, R.; Beiersdörfer, P.; Brown, G. V.; Chen, H.; Dunn, James P.; Foord, M. E.; Scott, H. A.; London, Richard A.; Steel, A. B.; Hoarty, D. J.; James, Steven; Brown, Colin; Hill, M. P.; Allan, Peter; Hobbs, L. M. R.

doi:10.1016/j.hedp.2017.09.002

Cited by 4 publications

(2 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Despite extensive research on isochoric heating of thin solid targets over the last two decades, there is no consensus on the dominant heating mechanism among resistive heating 16,17,18,19,20 , drag heating 21,22,23,24,25,26,27,28 , diffusion 1,3,29 , and both drag and resistive heating 30,31,32,33,34 . The current puzzle is that bulk electron temperatures (Te) estimated span a wide range from tens of eV to 5 keV 35 at similar laser and target conditions.…”

mentioning

confidence: 99%

Monochromatic 2DKαEmission Images Revealing Short-Pulse Laser Isochoric Heating Mechanism

et al. 2019

Self Cite

View full text Add to dashboard Cite

The rapid heating of a thin titanium foil by a high intensity, sub-picosecond laser is studied by using a 2D narrow-band x-ray imaging and x-ray spectroscopy. A novel monochromatic imaging diagnostic tuned to 4.51 keV Ti Kα was used to successfully visualize a significantly ionized area ( >17±1) of the solid density plasma to be within a ~ 35 μm diameter spot in the transverse direction and 2 μm in depth. The measurements and a 2D collisional Particle-in-cell simulation reveal that, in the fast isochoric heating of solid foil by intense laser light, such high ionization state in the solid titanium is achieved by thermal diffusion from the hot preplasma in a few picoseconds after the pulse ends. The shift of Kα and formation of a missing Kα cannot be explained with the present atomic physics model. The measured Kα image is reproduced only when a phenomenological model for the Kα shift with a threshold ionization of =17 is included. This work reveals how the ionization state and electron temperature of the isochorically-heated non-equilibrium plasma are independently increased.

show abstract

mentioning

confidence: 99%

Monochromatic 2DKαEmission Images Revealing Short-Pulse Laser Isochoric Heating Mechanism

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…Even with the short laser duration, the backlighter emission may last a few tens of ps. 11 The technique centers on changes to the K I edge or L II/III edge absorption features as a sample is heated to a high degree of ionization. A similar technique was demonstrated with Al heated directly by a 300 fs laser.…”

Section: B Motivation For a Short Pulse Low Z Backlightermentioning

confidence: 99%

Soft X-ray backlighter source driven by a short-pulse laser for pump-probe characterization of warm dense matter

McGuffey

Dozières

Kim

et al. 2018

Review of Scientific Instruments

View full text Add to dashboard Cite

show abstract

Radiation transfer in the spectra of short-pulse laser-heated targets

London,

Scott,

Martin

2024

Physics of Plasmas

View full text Add to dashboard Cite

The conditions in laser-produced plasmas are frequently determined with x-ray spectroscopy by comparing calculated to measured spectra. Line spectra from K-shell transitions of low- to mid-atomic number elements are most often used since the important physical processes are well understood and reliable spectra can be readily measured and calculated. Radiation transfer effects due to large optical depths of strong lines can influence the spectra. In this work, the effects of radiation transfer on the emission spectra of short-laser pulse-heated targets are studied. The possible errors made in inferring electron temperature by not including radiation transfer are quantified. The inclusion of radiative transfer in spectral calculations improves the accuracy of typical temperature diagnostics and allows the use of strong lines for diagnostics.

show abstract

Measurement and simulation of the temperature evolution of a short pulse laser heated buried layer target

Cited by 4 publications

References 13 publications

Monochromatic 2DKαEmission Images Revealing Short-Pulse Laser Isochoric Heating Mechanism

Monochromatic 2DKαEmission Images Revealing Short-Pulse Laser Isochoric Heating Mechanism

Soft X-ray backlighter source driven by a short-pulse laser for pump-probe characterization of warm dense matter

Radiation transfer in the spectra of short-pulse laser-heated targets

Contact Info

Product

Resources

About