- Tytuł:
- Ponderomotive self-focusing of a short laser pulse under a plasma density ramp
- Autorzy:
-
Kant, N.
Saralch, S.
Singh, H. - Powiązania:
- https://bibliotekanauki.pl/articles/146636.pdf
- Data publikacji:
- 2011
- Wydawca:
- Instytut Chemii i Techniki Jądrowej
- Tematy:
-
self-focusing
underdense plasma
plasma density ramp
ponderomotive force
short laser pulse
Gaussian beam - Opis:
- The ponderomotive self-focusing of a short laser pulse in an underdense plasma under a plasma density ramp is analyzed. The pulse may acquire a minimum spot size due to the ponderomotive self-focusing. Beyond the focus, the nonlinear refraction starts weakening, and the spot size of the laser pulse increases, resulting in an oscillatory self-focusing and defocusing behavior of the beam with the propagation distance. In order to minimize the defocusing, we introduce a localized upward plasma density ramp. Due to the upward plasma density ramp, the laser beam retains a minimum spot size. Self-focusing becomes stronger with a mild ripple as the propagation distance increases. The conditions for the ponderomotive self-focusing for suitable parameters of the laser beam and the plasma are determined. The plasma density ramp of the considered type may be observed in gas jet plasma experiments.
- Źródło:
-
Nukleonika; 2011, 56, 2; 149-153
0029-5922
1508-5791 - Pojawia się w:
- Nukleonika
- Dostawca treści:
- Biblioteka Nauki
Artykuł