Two-Plasmon-Decay Instability Stimulated by a Normal- and Large-Angle-Incidence Laser Pair

2024/05/12 by C. -W. Lian, Lian, C. -W., Y. Ji +15
Biochemistry, Genetics and Molecular Biology · Engineering · #Advanced Biosensing Techniques and Applications #Advanced Fluorescence Microscopy Techniques #FOS: Physical sciences #Integrated Circuits and Semiconductor Failure Analysis #Plasma Physics (physics.plasm-ph)

paper · pdf · doi:10.48550/arxiv.2405.07187

openalex publication_date 2024/05/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The two-plasmon-decay instability (TPD) is a critical target preheating risk in direct-drive inertial confinement fusion. In this paper, TPD collectively driven by a normal-incidence laser beam (Beam-N) and a large-angle-incidence laser beam (Beam-L) is investigated via particle-in-cell simulations. Significant TPD growth is found able to develop in this regime at previously unexpected low laser intensities if the intensity of Beam-L exceeds the large-angle-incidence threshold. Both beams contribute to the growth of TPD in a "seed-amplification" manner where the absolute instability driven by Beam-L provides the seeds that get convectively amplified by Beam-N, making TPD energetically important and causing significant pump depletion and hot electron generation.

Related

• Efficient generation of divergent and collimated hot electrons via a novel multi-beam two-plasmon decay and stimulated Raman scattering mechanism
• Anomalous hot electron generation from two-plasmon decay instability driven by broadband laser pulses with intensity modulations
• Two-plasmon decay instability and 3/2 harmonic generation in inhomogeneous magnetized plasma
• Resonance density range of absolute two-plasmon decay instability
• Resonance density range governs two-plasmon decay saturation and enables hot-electron prediction in inertial confinement fusion