A5015915311- Laser-induced spectroscopy and plasma
- Laser-Plasma Interactions and Diagnostics
- Ionosphere and magnetosphere dynamics
- Laser Material Processing Techniques
- Astro and Planetary Science
- Planetary Science and Exploration
- Advanced Optical Sensing Technologies
- Laser-Matter Interactions and Applications
- Clinical Nutrition and Gastroenterology
- Metallurgy and Material Forming
- Laser Design and Applications
- Metal Alloys Wear and Properties
- Atmospheric chemistry and aerosols
- Ion-surface interactions and analysis
- Metal Forming Simulation Techniques
- Geophysics and Gravity Measurements
- Atmospheric Ozone and Climate
- High-pressure geophysics and materials
- Healthcare Systems and Challenges
- Spacecraft and Cryogenic Technologies
- Earthquake Detection and Analysis
University of Rochester
2022-2024
Université de Bordeaux
2019-2022
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2019-2022
Centre National de la Recherche Scientifique
2019-2022
Centre Lasers Intenses et Applications
2019-2022
Laser imprinting possesses a potential danger for low-adiabat and high-convergence implosions in direct-drive inertial confinement fusion (ICF). Within certain ICF schemes, laser picket (prepulse) is used to condition the target increase interaction efficiency with main pulse. Whereas initially solid state (of ablators such as polystyrene) specific electronic optical properties, current state-of-the-art hydrocodes assume an initial plasma state, which ignores detailed formation process. To...
Laser direct drive (LDD) inertial confinement fusion (ICF) involves irradiating a spherical target of thermonuclear fuel coated with an ablator, usually made polystyrene. energy absorption near the surface leads to matter ablation, hydrodynamic shocks, and ultimately capsule implosion. The conservation symmetry is crucial for implosion efficiency, yet spatial modulations in laser intensity can induce nonuniformities, causing imprint phenomenon. Understanding imprint, especially considering...
For laser direct-drive (LDD) fusion implosions, intense beams are used to directly illuminate the inertial confinement (ICF) capsule. The beams' intensity nonuniformity (due speckles) on target can impose perturbation seeds which subsequently amplified by Rayleigh-Taylor instability growth, thereby leading degradation of ICF implosion performance. To devise methods mitigate this issue, adequate understanding underlying so-called laser-imprinting process is required. Here, we report...
Within the inertial confinement fusion (ICF) framework, solid-to-plasma transition of ablator arouses increasing interest, in particular due to laser-imprint issue. Phase evolution is linked electron collision frequency, which crucial importance since it drives heating by laser energy absorption and lattice-ion collisions between electrons system. Thus, an accurate description over whole temperature range occurring ICF, starting from a few tens kelvins (solid state) up millions (plasma...
The target performance of laser direct-drive inertial confinement fusion (ICF) can be limited by the development hydrodynamic instabilities resulting from nonhomegeneous absorption at surface, i.e., imprint on ablator. To understand and describe formation these instabilities, early ablator evolution during irradiation should considered. In this work, an improved modeling solid-to-plasma transition a polystyrene for ICF is proposed. This model devoted to implemented in hydrocodes dedicated...
Abstract. We investigate the collection of dust particles in mesosphere with MESS (MEteoric Smoke Sampler) instrument that is designed to fly on a sounding rocket. assume ice form polar between 80 and 85 km altitude summer contain meteoric smoke particles; these should be collected MESS. The consists device an opening closure mechanism, as well attached conic funnel which increases sampling area comparison area. Dust are either directly after passing through or indirectly colliding...
Abstract. We investigate the collection of dust from mesosphere with MESS instrument that is designed to fly on a sounding rocket. The consists device an opening and closure mechanism attached conic funnel. Attaching funnel increases sampling area in comparison area. will collect primary particles directly hit secondary form mesospheric hitting simulate entry impact onto detector considering their trajectories airflow fragmentation at estimate efficiency energy collecting design considered...