- Tytuł:
- A high-accuracy method of computation of X-ray waves propagation through an optical system consisting many lenses
- Autorzy:
-
Kshevetskii, S.
Wojda, P. - Powiązania:
- https://bibliotekanauki.pl/articles/1938594.pdf
- Data publikacji:
- 2016
- Wydawca:
- Politechnika Gdańska
- Tematy:
-
X-ray wave
X-ray optic
lens
non-uniform medium
focusing
numerical method
simulation
finite differences
stability
numerical error
wave phase
electromagnetic wave
fast oscillating function - Opis:
- The propagation of X-ray waves through an optical system consisting of many X-ray refractive lenses is considered. Two differential equations are contemplated for solving the problem for electromagnetic wave propagation: first – an equation for the electric field, second – an equation derived for a complex phase of an electric field. Both equations are solved by the use of a finite-difference method. The simulation error is estimated mathematically and investigated. The presented results for equations show that in order to establish a high accuracy computation a much smaller number of points is needed to solve the problem of X-ray waves propagation through a multi-lens system when the method for the second equation is used. The reason for such a result is that the electric field of a wave after passing through many lenses is a quickly oscillating function of coordinates, while the electric field phase is a quickly increasing, but not oscillating function. Therefore, a very detailed difference grid, which is necessary to approximate the considered electric field can be replaced by not such a detailed grid, when computations are made for the complex wave of the electric field. The simulation error of both suggested methods is estimated. It is shown that the derived equation for a phase function allows efficient simulation of propagation of X-rays for the multi-lens optical system.
- Źródło:
-
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2016, 20, 2; 171-186
1428-6394 - Pojawia się w:
- TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
- Dostawca treści:
- Biblioteka Nauki
Artykuł