Observations of the Effect of Ionization-Potential Depression in Hot Dense Plasma
Top Cited Papers
Open Access
- 26 June 2013
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 110 (26), 265003
- https://doi.org/10.1103/physrevlett.110.265003
Abstract
The newly commissioned Orion laser system has been used to study dense plasmas created by a combination of short pulse laser heating and compression by laser driven shocks. Thus the plasma density was systematically varied between 1 and by using aluminum samples buried in plastic foils or diamond sheets. The aluminum was heated to electron temperatures between 500 and 700 eV allowing the plasma conditions to be diagnosed by -shell emission spectroscopy. The -shell spectra show the effect of the ionization potential depression as a function of density. The data are compared to simulated spectra which account for the change in the ionization potential by the commonly used Stewart and Pyatt prescription and an alternative due to Ecker and Kröll suggested by recent x-ray free-electron laser experiments. The experimental data are in closer agreement with simulations using the model of Stewart and Pyatt.
Keywords
Funding Information
- U.S. Department of Energy
This publication has 19 references indexed in Scilit:
- Measurements of emission spectra from hot, dense germanium plasma in short pulse laser experimentsHigh Energy Density Physics, 2010
- Production of Dense Plasmas with sub-10-fs Laser PulsesPhysical Review Letters, 2006
- FLYCHK: Generalized population kinetics and spectral model for rapid spectroscopic analysis for all elementsHigh Energy Density Physics, 2005
- Pressure Ionization and Line Merging in Strongly Coupled Plasmas Produced by 100-fs Laser PulsesPhysical Review Letters, 1998
- A time-dependent model for plasma spectroscopy of K-shell emittersJournal of Quantitative Spectroscopy and Radiative Transfer, 1996
- Blue Shift of the K Absorption Edge in Laser-Shocked SolidsEurophysics Letters, 1989
- Time-Resolved Continuum-Edge-Shift Measurements in Laser-Shocked SolidsPhysical Review Letters, 1987
- The stability of multiple-shell ICF targetsJournal of Physics D: Applied Physics, 1980
- Lowering of Ionization Potentials in PlasmasThe Astrophysical Journal, 1966
- Ionic Depression of Series Limits in Cne-Electron Spectra.The Astrophysical Journal, 1939