Scholarlink

<p>This study investigates harmonic efficiency (SHE) enhancement in laser–plasma interactions by employing a chirped, high-intensity super-Gaussian laser beam within a thermal quantum plasma. The plasma was characterized by a non-uniform initial density ramp. We derived an analytical expression for the SHE as a function of the normalized laser propagation distance by applying the wave equation under the Wentzel–Kramers–Brillouin (W–K–B) and paraxial ray approximation frameworks. Numerical simulations, particularly with titanium-sapphire lasers, revealed that several factors, such as lower laser intensity, shorter wavelengths, reduced pulse duration, and lower repetition rates, significantly improve the SHE. Moreover, the positive chirp parameter further enhanced the SHE under the constraints of the pulse duration. The study also emphasizes the significance of the plasma's Fermi temperature, which increases the sensitivity of the SHE to variations in laser parameters. Additionally, the findings demonstrate a direct correlation between increased SHE and rising plasma electron temperature due to the enhancement of plasma density.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Investigating quantum plasma temperature on the chirped super-Gaussian laser parameters and the second harmonic efficiency

  • 期刊论文

  • 发表日期：

    2025年5月25日

查看全文
  • Sara Sohrabi,
  • Saeid Jelvani,
  • Katayoon Samavati,
  • Laleh Farhang Matin

摘要

This study investigates harmonic efficiency (SHE) enhancement in laser–plasma interactions by employing a chirped, high-intensity super-Gaussian laser beam within a thermal quantum plasma. The plasma was characterized by a non-uniform initial density ramp. We derived an analytical expression for the SHE as a function of the normalized laser propagation distance by applying the wave equation under the Wentzel–Kramers–Brillouin (W–K–B) and paraxial ray approximation frameworks. Numerical simulations, particularly with titanium-sapphire lasers, revealed that several factors, such as lower laser intensity, shorter wavelengths, reduced pulse duration, and lower repetition rates, significantly improve the SHE. Moreover, the positive chirp parameter further enhanced the SHE under the constraints of the pulse duration. The study also emphasizes the significance of the plasma's Fermi temperature, which increases the sensitivity of the SHE to variations in laser parameters. Additionally, the findings demonstrate a direct correlation between increased SHE and rising plasma electron temperature due to the enhancement of plasma density.