Investigation of the effect of laser pulse length on the inverse bremsstrahlung absorption in laser–fusion plasma

• Published in: High energy density physics 2015-09, Vol.16, p.32-35
• Main Authors: Firouzi Farrashbandi, N., Gholamzadeh, L., Eslami-Kalantari, M., Sharifian, M., Sid, A.
• Format: Article
• Language: English
• Subjects: Laser–fusion plasma; The effect of laser pulse length; The inverse bremsstrahlung absorption
• ISSN: 1574-1818; 1878-0563
• DOI: 10.1016/j.hedp.2015.05.002

One of the most important aspects in laser fusion is optimizing of the laser energy in the fusion target. Using the kinetic theory, the inverse bremsstrahlung absorption has been investigated in the homogeneous hot plasmas. A pulsed laser is considered instead of a continuous laser and effect of the physical parameters such as pulse length, wavelength and temperature have been studied on the absorption value. In our calculations, the q-nonextensive distribution function (f0) is used for the electrons distribution. It has been shown that the absorption increases for both long pulse length, τL, and laser short wavelengths, and decreases with increasing of temperature.