S. P. Regan

Performance enhancement of direct-drive shock-augmented ignition inertial fusion implosions through shock timing optimization

M. Khan, K. Churnetski, Duncan Barlow, R. Betti et autres

Shock-augmented ignition (SAI) [R. H. H. Scott et al., Phys. Rev. Lett. 129, 195001 (2022)0031-900710.1103/PhysRevLett.129.195001] is an alternative inertial confinement fusion concept that is designed to achieve high energy gain by combining improved resilience to instabilities with enhanced fuel compression. In SAI, …

it, gb, us, fr, ru, cn (code pays fourni par la source)

Expanding the Devonian-Carboniferous Magmatism: Redefining Mafic Dikes in the Sierras Pampeanas of Córdoba, Argentina

Joel Jaeggi Castagno, Alina B. Guereschi, Roberto Martino, Florian Hofmann et autres

Oroclinal Bending of Southern Alaska during Final Assembly of the North American Cordillera

Trevor S. Waldien, S. P. Regan, Bernard Housen

Correlating hot-electron preheat from the two-plasmon decay instability to ρR degradation for direct-drive implosions on OMEGA

D. Cao, W. Theobald, M. J. Rosenberg, L. Ceurvorst et autres

Focused experiments were performed with the goal of isolating the impact of hot-electron preheat on compression in deuterium–tritium (DT) layered, direct-drive implosions on OMEGA. Preheat from the hot-electrons generated by two-plasmon–decay (TPD) activity was varied through the incident laser intensity, with the …

us (code pays fourni par la source)

Printed Targets with Micron-Scale Feature Patterns for the Study of Ablator Defects on OMEGA

S. Fess, M. J. Bonino, Dayna Wasilewski, Neil Redden et autres

As per present models, laser imprint and implosion symmetry are insufficient to account for observed performance degradation of direct-drive cryogenic fusion implosions. More and better data are needed on ablator defects as a source of hydrodynamic instability and mix. To investigate this, …

us (code pays fourni par la source)

Approaching hydro-equivalent ignition in laser direct-drive via target design optimization using novel statistical modeling

A. Lees, R. Betti, V. Gopalaswamy, J. P. Knauer et autres

Laser direct-drive offers significant advantages in terms of target simplicity, improved energy coupling, and large fuel masses over indirect drive. However, performance degradations from hydrodynamic and laser-plasma instabilities seeded and driven by the direct illumination pose limitations on the parameter space available …

us (code pays fourni par la source)

Directional, joule per steradian THz pulses from multi-joule laser irradiation of wires

Gerrit Bruhaug, Eric A. Smith, Y. E, Jiacheng Zhao et autres

We report on THz pulses with energy flux exceeding 2.5 J/sr and high directionality, generated from picosecond, joule laser irradiation of microwires. The impact of wire diameter, length, and laser irradiation orientation is explored with the irradiation of 160 μm diameter, 750 …

us (code pays fourni par la source)

Multiframe X-ray diffraction on the OMEGA EP laser

D. N. Polsin, J. R. Rygg, D. T. Bishel, D. A. Chin et autres

A method of measuring multiple temporally resolved powder x-ray diffraction measurements during a single dynamic compression laser experiment has been demonstrated on the OMEGA EP laser. Up to four time-gated snapshots of the x-ray diffraction pattern are collected on an ultrafast x-ray …

us (code pays fourni par la source)

A future of inertial confinement fusion without laser-plasma instabilities

D. H. Froula, C. Dorrer, A. Colaïtis, D. H. Edgell et autres

From the beginning of inertial confinement fusion (ICF) research, laser-plasma instabilities excited by narrowband lasers have limited the hydrodynamic design space of all laser-based approaches to inertial fusion energy (IFE). With advances in broadband laser technologies, the next generation of ICF drivers …

us (code pays fourni par la source)

Three-dimensional reconstruction of inertial confinement fusion hot-spot plasma from x-ray and nuclear diagnostics on OMEGA

K. Churnetski, K. M. Woo, W. Theobald, R. Betti et autres

Multidimensional effects degrade the neutron yield and the compressed areal density of laser-direct-drive inertial confinement fusion implosions of layered deuterium–tritium cryogenic targets on the OMEGA Laser System with respect to 1D radiation-hydrodynamic simulation predictions. A comprehensive physics-informed 3D reconstruction effort is under …

us, de (code pays fourni par la source)

Inference of the neutron down-scatter ratio using neutron time-of-flight data for DT-layered implosions on the OMEGA laser

D. Patel, J. P. Knauer, R. Betti, B. Stanley et autres

First analysis of the neutron time of flight (nTOF) data is presented to infer the areal density using the neutron down-scatter ratio (DSR) for OMEGA deuterium–tritium (DT)-layered (cryogenic) implosions. The required very-high-dynamic range (nTOF) signal is constructed using an nTOF detector [Forrest …

us (code pays fourni par la source)

Distortions in charged-particle images of laser direct-drive inertial confinement fusion implosions

P. V. Heuer, J. Peebles, J. H. Kunimune, H. G. Rinderknecht et autres

Energetic charged particles generated by inertial confinement fusion (ICF) implosions encode information about the spatial morphology of the hotspot and dense fuel during the time of peak fusion reactions. The knock-on deuteron imager (KoDI) was developed at the Omega Laser Facility to …

us, gb (code pays fourni par la source)