| Autor: |
Koch, Jeffrey A., Landen, Otto L., Kozioziemski, Bernard J., Izumi, Nobuhiko, Dewald, Eduard L., Salmonson, Jay D., Hammel, Bruce A. |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; Jun2009, Vol. 105 Issue 11, p113112-1-113112-8, 8p, 3 Black and White Photographs, 4 Diagrams, 9 Graphs |
| Abstrakt: |
We explore various laser-produced plasma and inertial confinement fusion applications of phase-contrast x-ray radiography, and we show how the main features of these enhancements can be considered from a geometrical optics perspective as refraction enhancements. This perspective simplifies the analysis and often permits simple analytical formulas to be derived that predict the enhancements. We explore a raytrace approach to various material interface applications, and we explore a more general example of refractive bending of x rays by an implosion plasma. We find that refraction-enhanced x-ray radiography of implosions may provide a means to quantify density differences across shock fronts as well as density variations caused by local heating due to high-Z dopants. We also point out that refractive bending by implosions plasmas can blur fine radiograph features and can also provide misleading contrast information on area-backlit pinhole imaging experiments unless its effects are taken into consideration. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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