Ablation driven by hot electrons generated during the ignitor laser pulse in shock ignition

2012 ◽  
Vol 19 (12) ◽  
pp. 122705 ◽  
Author(s):  
A. R. Piriz ◽  
G. Rodriguez Prieto ◽  
N. A. Tahir ◽  
Y. Zhang ◽  
S. D. Liu ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Hot Electrons ◽  
Shock Ignition

Optimal design of shock ignition target in order to stop generated hot electrons within the cold fuel

2021 ◽  
Author(s):  
Seddigheh Pourhosseini ◽  
Abbas Ghasemizad ◽  
Somayeh Rezaei ◽  
Mohammad J. Jafari
Keyword(s):  
Optimal Design ◽  
Hot Electrons ◽  
Shock Ignition

scholarly journals Progress in understanding the role of hot electrons for the shock ignition approach to inertial confinement fusion

2018 ◽  
Vol 59 (3) ◽  
pp. 032012 ◽  
Author(s):  
D. Batani ◽  
L. Antonelli ◽  
F. Barbato ◽  
G. Boutoux ◽  
A. Colaïtis ◽  
...  
Keyword(s):  
Inertial Confinement Fusion ◽  
Hot Electrons ◽  
Inertial Confinement ◽  
Confinement Fusion ◽  
Shock Ignition

Short laser pulse induced generation of hot electrons and their anomalous stopping in overdense plasmas

2005 ◽  
Vol 45 (11) ◽  
pp. 1377-1385 ◽  
Author(s):  
S Sengupta ◽  
A.S Sandhu ◽  
G.R Kumar ◽  
A Das ◽  
P.K Kaw
Keyword(s):  
Laser Pulse ◽  
Short Laser Pulse ◽  
Hot Electrons

scholarly journals Preliminary results from the LMJ-PETAL experiment on hot electrons characterization in the context of shock ignition

2020 ◽  
Vol 36 ◽  
pp. 100796 ◽  
Author(s):  
S.D. Baton ◽  
A. Colaïtis ◽  
C. Rousseaux ◽  
G. Boutoux ◽  
S. Brygoo ◽  
...  
Keyword(s):  
Hot Electrons ◽  
Preliminary Results ◽  
Shock Ignition

Influence of laser induced hot electrons on the threshold for shock ignition of fusion reactions

2016 ◽  
Vol 23 (7) ◽  
pp. 072703 ◽  
Author(s):  
A. Colaïtis ◽  
X. Ribeyre ◽  
E. Le Bel ◽  
G. Duchateau ◽  
Ph. Nicolaï ◽  
...  
Keyword(s):  
Hot Electrons ◽  
Fusion Reactions ◽  
Shock Ignition

scholarly journals Studies of ablated plasma and shocks produced in a planar target by a sub-nanosecond laser pulse of intensity relevant to shock ignition

2015 ◽  
Vol 33 (3) ◽  
pp. 561-575 ◽  
Author(s):  
J. Badziak ◽  
L. Antonelli ◽  
F. Baffigi ◽  
D. Batani ◽  
T. Chodukowski ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Laser Intensity ◽  
Laser System ◽  
Energy Conversion Efficiency ◽  
Hot Electrons ◽  
Plastic Layer ◽  
Maximum Pressure ◽  
Nanosecond Laser Pulse ◽  
Nanosecond Laser ◽  
Planar Target

AbstractThe effect of laser intensity on characteristics of the plasma ablated from a low-Z (CH) planar target irradiated by a 250 ps, 0.438 µm laser pulse with the intensity of up to 1016 W/cm2 as well as on parameters of the laser-driven shock generated in the target for various scale-lengths of preformed plasma was investigated at the kilojoule Prague Asterix Laser System (PALS) laser facility. Characteristics of the plasma were measured with the use of 3-frame interferometry, ion diagnostics, an X-ray spectrometer, and Kα imaging. Parameters of the shock generated in a Cl doped CH target by the intense 3ω laser pulse were inferred by numerical hydrodynamic simulations from the measurements of craters produced by the shock in the massive Cu target behind the CH layer. It was found that the pressure of the shock generated in the plastic layer is relatively weakly influenced by the preplasma (the pressure drop due to the preplasma presence is ~10–20%) and at the pulse intensity of ~1016 W/cm2 the maximum pressure reaches ~80–90 Mbar. However, an increase in pressure of the shock with the laser intensity is slower than predicted by theory for a planar shock and the maximum pressure achieved in the experiment is by a factor of ~2 lower than predicted by the theory. Both at the preplasma absence and presence, the laser-to-hot electrons energy conversion efficiency is small, ~1% or below, and the influence of hot electrons on the generated shock is expected to be weak.

scholarly journals Ablation driven by hot electrons in shock ignition

2016 ◽  
Vol 688 ◽  
pp. 012087
Author(s):  
A R Piriz ◽  
G Rodriguez Prieto ◽  
N A Tahir ◽  
Y T Zhao
Keyword(s):  
Hot Electrons ◽  
Shock Ignition

scholarly journals Time evolution of stimulated Raman scattering and two-plasmon decay at laser intensities relevant for shock ignition in a hot plasma

2019 ◽  
Vol 7 ◽  
Author(s):  
G. Cristoforetti ◽  
L. Antonelli ◽  
D. Mancelli ◽  
S. Atzeni ◽  
F. Baffigi ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Raman Scattering ◽  
Inertial Confinement Fusion ◽  
Stimulated Raman Scattering ◽  
Critical Density ◽  
Time History ◽  
High Energy ◽  
Experimental Results ◽  
Stimulated Raman ◽  
Shock Ignition

Laser–plasma interaction (LPI) at intensities $10^{15}{-}10^{16}~\text{W}\cdot \text{cm}^{-2}$ is dominated by parametric instabilities which can be responsible for a significant amount of non-collisional absorption and generate large fluxes of high-energy nonthermal electrons. Such a regime is of paramount importance for inertial confinement fusion (ICF) and in particular for the shock ignition scheme. In this paper we report on an experiment carried out at the Prague Asterix Laser System (PALS) facility to investigate the extent and time history of stimulated Raman scattering (SRS) and two-plasmon decay (TPD) instabilities, driven by the interaction of an infrared laser pulse at an intensity ${\sim}1.2\times 10^{16}~\text{W}\cdot \text{cm}^{-2}$ with a ${\sim}100~\unicode[STIX]{x03BC}\text{m}$ scalelength plasma produced from irradiation of a flat plastic target. The laser pulse duration (300 ps) and the high value of plasma temperature ( ${\sim}4~\text{keV}$ ) expected from hydrodynamic simulations make these results interesting for a deeper understanding of LPI in shock ignition conditions. Experimental results show that absolute TPD/SRS, driven at a quarter of the critical density, and convective SRS, driven at lower plasma densities, are well separated in time, with absolute instabilities driven at early times of interaction and convective backward SRS emerging at the laser peak and persisting all over the tail of the pulse. Side-scattering SRS, driven at low plasma densities, is also clearly observed. Experimental results are compared to fully kinetic large-scale, two-dimensional simulations. Particle-in-cell results, beyond reproducing the framework delineated by the experimental measurements, reveal the importance of filamentation instability in ruling the onset of SRS and stimulated Brillouin scattering instabilities and confirm the crucial role of collisionless absorption in the LPI energy balance.

scholarly journals Effects of Laser Wavelength on Hot Electrons Produced by Ultrashort Intense Laser Pulse on Solid-Density Targets.

2002 ◽  
Vol 78 (8) ◽  
pp. 717-718 ◽  
Author(s):  
Susumu KATO ◽  
Eisuke MIURA ◽  
Eiichi TAKAHASHI ◽  
Tatsufumi NAKAMURA ◽  
Tomokazu KATO ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Laser Wavelength ◽  
Hot Electrons ◽  
Intense Laser ◽  
Intense Laser Pulse ◽  
Solid Density
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