Study of shock waves generation, hot electron production and role of parametric instabilities in an intensity regime relevant for the shock ignition

The role of the coronal electron plasma temperature for shock-ignition conditions is analysed with respect to the dominant parametric processes: stimulated Brillouin scattering, stimulated Raman scattering, two-plasmon decay (TPD), Langmuir decay instability (LDI) and cavitation. TPD instability and cavitation are sensitive to the electron temperature. At the same time the reflectivity and high-energy electron production are strongly affected. For low plasma temperatures the LDI plays a dominant role in the TPD saturation. An understanding of laser–plasma interaction in the context of shock ignition is an important issue due to the localization of energy deposition by collective effects and hot electron production. This in turn can have consequences for the compression phase and the resulting gain factor of the implosion phase.

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Experimental study of hot electron generation in shock ignition relevant high-intensity regime with large scale hot plasmas

Physics of Plasmas ◽

10.1063/1.5119250 ◽

2020 ◽

Vol 27 (2) ◽

pp. 023111 ◽

Cited By ~ 1

Author(s):

S. Zhang ◽

C. M. Krauland ◽

J. Peebles ◽

J. Li ◽

F. N. Beg ◽

...

Keyword(s):

Experimental Study ◽

High Intensity ◽

Large Scale ◽

Hot Electron ◽

Electron Generation ◽

Intensity Regime ◽

Shock Ignition

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Enhanced hot-electron production and strong-shock generation in hydrogen-rich ablators for shock ignition

Physics of Plasmas ◽

10.1063/1.4986797 ◽

2017 ◽

Vol 24 (12) ◽

pp. 120702 ◽

Cited By ~ 6

Author(s):

W. Theobald ◽

A. Bose ◽

R. Yan ◽

R. Betti ◽

M. Lafon ◽

...

Keyword(s):

Strong Shock ◽

Hot Electron ◽

Electron Production ◽

Shock Generation ◽

Shock Ignition

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Increased hot electron production from the addition of a gas cell in sub-picosecond laser–foil interactions

Physics of Plasmas ◽

10.1063/5.0021221 ◽

2020 ◽

Vol 27 (12) ◽

pp. 123101

Author(s):

T. Peterken ◽

A. P. L. Robinson ◽

R. M. G. M. Trines ◽

R. J. Clarke

Keyword(s):

Picosecond Laser ◽

Hot Electron ◽

Gas Cell ◽

Electron Production

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Hot electron production and diffuse excited states in C70, C82, and Sc3N@C80 characterized by angular-resolved photoelectron spectroscopy

The Journal of Chemical Physics ◽

10.1063/1.4818987 ◽

2013 ◽

Vol 139 (8) ◽

pp. 084309 ◽

Cited By ~ 15

Author(s):

J. Olof Johansson ◽

Elvira Bohl ◽

Gordon G. Henderson ◽

Benoit Mignolet ◽

T. John S. Dennis ◽

...

Keyword(s):

Excited States ◽

Photoelectron Spectroscopy ◽

Hot Electron ◽

Electron Production

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The Role of Mesh Generation, Adaptation, and Refinement on the Computation of Flows Featuring Strong Shocks

Modelling and Simulation in Engineering ◽

10.1155/2012/631276 ◽

2012 ◽

Vol 2012 ◽

pp. 1-15 ◽

Cited By ~ 4

Author(s):

Aldo Bonfiglioli ◽

Renato Paciorri ◽

Andrea Di Mascio

Keyword(s):

Shock Waves ◽

Mesh Generation ◽

The Other ◽

Shock Capturing ◽

Structured Grids ◽

Computational Mesh ◽

Versatile Technique ◽

Coarse Meshes ◽

Shock Fitting

Within a continuum framework, flows featuring shock waves can be modelled by means of either shock capturing or shock fitting. Shock-capturing codes are algorithmically simple, but are plagued by a number of numerical troubles, particularly evident when shocks are strong and the grids unstructured. On the other hand, shock-fitting algorithms on structured grids allow to accurately compute solutions on coarse meshes, but tend to be algorithmically complex. We show how recent advances in computational mesh generation allow to relieve some of the difficulties encountered by shock capturing and contribute towards making shock fitting on unstructured meshes a versatile technique.

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