Influence of External Magnetic Field Alignment on Terahertz Generation through laser plasma nonlinear interaction in Nonparaxial Region
الباحث الأول:
Munther B. Hassan
الباحثين الآخرين:
Lina Mohammed Hatem
المجلة:
Annals of the Romanian Society for Cell Biology
تاريخ النشر:
13 يونيو، 2021
مختصر البحث:
This paper presents a theoretical study to explain the nonlinear self-focusing of Gaussian laser beam through magnetized plasma under the non- paraxial ray approximation where the Relativistic nonlinearity is operated. The theoretical analysis and n…
This paper presents a theoretical study to explain the nonlinear self-focusing of Gaussian laser beam through magnetized plasma under the non- paraxial ray approximation where the Relativistic nonlinearity is operated. The theoretical analysis and numerical calculations show that in both cases (longitudinal and transverse magnetic fields), the increasing of external magnetic field values will lead to increase and enhance the nonlinear self-focusing of Gaussian laser beam, therefore the intensity will reach in the order of 1018 W.cm-2 or more which is enough to excite a terahertz radiation by relativistic nonlinearity. The terahertz radiation generation is depending on the down-conversion of three wave mixing technique and on the fulfilling of the phase matching conditions between the pump wave (laser beam), plasma wave and generated terahertz wave. The results showed the self-focused was stronger in the case of the longitudinalmagnetic fieldsthan in thecase of the transverse magnetic fields and the product THZ was also higher in longitudinal than in the case of the transverse magnetic fields in non- paraxial region .
