Gabriele Cristoforetti

Effects of spatial beam coherence and plasma scale length on stimulated Raman scattering and two-plasmon decay

Chiharu Nakatsuji, Yuji Takagi, Gabriele Cristoforetti, Sota Matsuura et autres

We present an experimental investigation demonstrating that the suppression of parametric instabilities in laser-plasma interactions under conditions relevant to direct-drive inertial confinement fusion, specifically backward stimulated Raman scattering (SRS) and two-plasmon decay (TPD), shows the effects of spatial beam coherence and plasma-density …

fr (code pays fourni par la source)

Effects of an external magnetic field on hot electron transport in the shock ignition scheme

V. Rosciano, A. Tentori, J. Trela, Gabriele Cristoforetti et autres

Abstract The presented experiment aims to investigate the effects of applying an external magnetic field on laser–target interaction, hot electron generation and propagation in the target, and ultimately on the shock dynamics. The magnetic field strength was set at 20 T, which …

es, fr, us, pl, ru (code pays fourni par la source)

Experimental study of laser plasma instabilities with broadband laser pulses at the GSI PHELIX laser facility

Christoph Kanstein, F. Wasser, Ş. Zähter, S. Atzeni et autres

Abstract We present first experimental data obtained at the recently commissioned experimental platform to compare laser plasma instabilities (LPIs) driven by monochromatic and broad spectral bandwidth ( ≈ 0.5 % ) laser pulses with a wavelength of around 527 nm. The evaluation …

de, it, gb, us (code pays fourni par la source)

X-ray thermal diffuse scattering as a texture-robust temperature diagnostic for dynamically compressed solids

P. G. Heighway, D. J. Peake, Thomas H. Stevens, Justin S. Wark et autres

We present a model of x-ray thermal diffuse scattering (TDS) from a cubic polycrystal with an arbitrary crystallographic texture, based on the classic approach of Warren [B. E. Warren, Acta Crystallogr. 6, 803 (1953)]. We compare the predictions of our model with …

gb, fr, us, de, cn, it, kh, es, kr, jp, ch (code pays fourni par la source)

Laser–plasma instabilities driven by 1 ω0 pulses at shock ignition conditions

B. Gosling, T. D. Arber, Gabriele Cristoforetti, Ph. D. Nicolaï et autres

Recent experiments using 1ω0 (λ0=1.314 μm) laser pulses at the PALS facility have demonstrated the excitation of multiple parametric instabilities. At peak intensities (I∼1016 W cm−2), the combination of high irradiance (Iλ2) and electron temperatures (∼ 3–4 keV) creates plasma conditions relevant …

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

Investigation of ruling parameters on the growth of side and back stimulated Raman scattering in inhomogeneous plasmas at shock ignition laser intensity

Gabriele Cristoforetti, E. J. Hume, Shubham Agarwal, D. Batani et autres

Recent experiments at the National Ignition Facility and theoretical modeling suggest that side stimulated Raman scattering (SSRS) instability could reduce laser–plasma coupling and generate considerable fluxes of suprathermal hot electrons under interaction conditions envisaged for direct-drive schemes for inertial confinement fusion. Nonetheless, …

it, cz, fr, gb, es, me, gr (code pays fourni par la source)

Calibration and characterization of the line-VISAR diagnostic at the HED-HIBEF instrument at the European XFEL

Adrien Descamps, Trevor M. Hutchinson, Richard J. Briggs, E. E. McBride et autres

In dynamic-compression experiments, the line-imaging Velocity Interferometer System for Any Reflector (VISAR) is a well-established diagnostic used to probe the velocity history, including wave profiles derived from dynamically compressed interfaces and wavefronts, depending on material optical properties. Knowledge of the velocity history …

gb, us, de, fr, se, cn, it, es, kr, jp, ch (code pays fourni par la source)

Facility requirements for laser-plasma interaction studies and advanced schemes of direct drive inertial fusion

E. J. Hume, Gabriele Cristoforetti, P. Koester, L. A. Gizzi

Inertial confinement fusion (ICF) employs high power lasers to rapidly compress and heat a pellet of fuel to nuclear fusion conditions in an effort to generate energy. ICF is now receiving great enthusiasm and interest after the demonstration of ignition and energy …

The structure of liquid carbon elucidated by in situ X-ray diffraction

D. Kraus, J. Rips, Maximilian Schörner, Michael G. Stevenson et autres

Abstract Carbon has a central role in biology and organic chemistry, and its solid allotropes provide the basis of much of our modern technology1. However, the liquid form of carbon remains nearly uncharted2, and the structure of liquid carbon and most of …

de, us, fr, gb, cn, it, es, kr, jp, ch (code pays fourni par la source)

Experimental investigation of the density-scale-length effects on laser–plasma instabilities toward the shock-ignition scheme in direct-drive inertial-confinement fusion

Chiharu Nakatsuji, Koki Kawasaki, Tomoyuki Idesaka, Shigeki Matsuura et autres

In direct-drive inertial-confinement fusion, understanding and controlling laser–plasma instabilities (LPIs) is crucial to optimizing energy coupling and achieving high-gain fusion. Herein, we report the experimental investigation of the effects of density scale-length on LPIs. The experiment was performed at the GEKKO-XII Laser …

jp, it, fr (code pays fourni par la source)

Femtosecond temperature measurements of laser-shocked copper deduced from the intensity of the x-ray thermal diffuse scattering

Justin S. Wark, D. J. Peake, Thomas H. Stevens, P. G. Heighway et autres

We present 50-fs, single-shot measurements of the x-ray thermal diffuse scattering (TDS) from copper foils that have been shocked via nanosecond laser ablation up to pressures above ∼135 GPa. We hence deduce the x-ray Debye–Waller factor, providing a temperature measurement. The targets …

gb, us, fr, de, cn, it, kh, es, kr, jp, ch (code pays fourni par la source)

Femtosecond temperature measurements of laser-shocked copper deduced from the intensity of the x-ray thermal diffuse scattering

Justin S. Wark, David J. Peake, Thomas H. Stevens, P. G. Heighway et autres

We present 50-fs, single-shot measurements of the x-ray thermal diffuse scattering (TDS) from copper foils that have been shocked via nanosecond laser-ablation up to pressures above 135~GPa. We hence deduce the x-ray Debye-Waller (DW) factor, providing a temperature measurement. The targets were …