Stefan Hüller

 

 

 

 

 

 

 

Directeur de Recherche au CNRS

Convention de recherche : GDR "LEPICE" Lasers énergétiques et intenses et plasmas sous conditions extrêmes

 

Adresse CPHT, Ecole Polytechnique, 91128 Palaiseau cedex, France
Tél. 01 69 33 42 32
Contact prenom.nom@polytechnique.edu
Bureau Bât. 6, Piéce 06.1028

Recherches actuelles

Mes activités de recherche se trouvent dans le contexte de la fusion laser :

  • l’interaction des lasers avec des plasmas en expansion,
  • l’interaction entre des impulsions courtes (’sub-ps’) avec la matière dense et l’hydrodynamique radiative des plasmas chauds.

J’ai effectué de nombreuses études sur la modélisation des instabilités paramétriques qui sont néfastes pour la fusion par laser. Mes études combinent des approches théoriques et numériques en utilisant des approches fluides et cinétique du plasma.

Notre travail d’équipe sur la modélisation d l’interaction des faisceaux laser avec des plasmas en expansion, en tenant compte des instabilités paramétriques en géométrie multidimensionnelle, a montré un progrès important pour la compréhension des résultats expérimentaux. en particulier sur l’interpretation des effets de saturation des instabilités paramétriques de diffusion.

La modélisation et la compréhension des instabilités paramétriques etait le sujet des projets "CORPARIN" et "ILPHYGERIE" financés par l’Agence Nationale de Recherche (programme ANR-BLANC).

Dans le domaine de l’interaction des impulsion laser ultra courte avec la matière à densité solide, j’ai étudié des mécanismes de génération d’harmoniques ainsi que l’évolution de l’état de matière d’une cible après le passage d’une impulsion laser, en fonction de sa durée et son intensité : un plasma chaud classique en pleine expansion hydrodynamique ou un plasma dense sans expansion ("hot solid").

Biographie : http://www.cpht.polytechnique.fr/IM...

Sélection d’articles

S. Hüller, A. Porzio, A. Héron, P. Mora; Laser-driven ion acceleration in presence of increasing heating of relativistic electrons at steep overdense plasma interfaces; Physics of Plasmas 31, 103103 (2024); https://hal.science/hal-03868946

S. Hüller, J. D. Ludwig, H. A. Rose, C. Bruulsema, W. Farmer, P. Michel, A. Milder, G. F. Swadling, and W. Rozmus; Modeling and simulations of hydrodynamic shocks in a plasma flowing across randomized ICF scale laser beams; https://hal.science/hal-04645809; Comptes Rendus de l’Académie des Sciences Physique Vol. 25, 353-365 (2024)

J. D. Ludwig, S. Hüller, H. A. Rose, C. Bruulsema, W. Farmer, P. Michel, A. Milder, G. F. Swadling, and W. Rozmus  "Shock formation in flowing plasmas by temporally and spatially smoothed laser beams", Phys. Plasmas 31, 032103 (2024). https://cnrs.hal.science/hal-04255663

Mufei Luo, Stefan Hüller, Min Chen, and Zhengming Sheng; Frequency chirp effects on stimulated Raman scattering in inhomogeneous plasmas; Phys. Plasmas 29, 072709 (2022),  https://aip.scitation.org/doi/10.1063/5.0096771 https://hal.archives-ouvertes.fr/hal-03706556

Mufei Luo, Stefan Hüller, Min Chen, and Zhengming Sheng;
On the role of bandwidth in pump and seed light waves for stimulated Raman scattering in inhomogeneous plasmas;
Phys. Plasmas 29, 032102 (2022). https://doi.org/10.1063/5.0078985, https://hal.archives-ouvertes.fr/hal-03586601

G. Cristoforetti, S. Hüller, P. Koester, L. Antonelli, S. Atzeni, et al.. Observation and modelling of Stimulated Raman Scattering driven by an optically smoothed laser beam in experimental conditions relevant for Shock Ignition. High Power Lasers and Engineering 8, (2021), https://hal.archives-ouvertes.fr/hal-03334746.

Stefan Hüller, Gaurav Raj, Mufei Luo, Wojciech Rozmus, Denis Pesme;
Crossed beam energy transfer between optically smoothed laser beams in inhomogeneous plasmas.
Philosophical Transactions of the Royal Society A 378, 20200038 (2020); https://royalsocietypublishing.org/doi/10.1098/rsta.2020.0038 ;   https://hal.archives-ouvertes.fr/hal-02880936

G. Tran, P. Loiseau, A. Fusaro, A. Héron, S. Hüller, L. Maëder, P-E. Masson-Laborde, D. Penninckx, G. Riazuelo  Fluid modelling of Stimulated Raman Scattering accounting for trapped particles benchmarked against fully kinetic simulations, 
Phys. Plasmas 27, 122707 (2020). https://doi.org/10.1063/5.0018669; see accepted manuscript

S. Hüller, G. Raj, W. Rozmus, and D. Pesme,
Crossed beam energy transfer in the presence of laser speckle ponderomotive self-focusing and nonlinear sound waves.
Physics of Plasmas 27, 022703 (2020); https://aip.scitation.org/doi/10.1063/1.5125759

S. Hüller, A. Porzio, J.-C. Adam, and A. Héron,
"On the non-thermal nature of distributions of electrons accelerated by high-intensity lasers at the vacuum-plasma interface"
Physics of Plasmas 26(8), 083107 (2019), https://doi.org/10.1063/1.5111934
 
J. D. Ludwig, P.-E. Masson-Laborde, S. Hüller, W. Rozmus, and S. C. Wilks,
"Enhancement and Control of Laser Wakefields via a Backward Raman Amplifier",
Phys. Plasmas 25(5), 053108 (2018). https://doi.org/10.1063/1.5023387
 
G. Raj and S. Hüller, 
"Impact of laser beam speckle structure on crossed beam energy transfer via beam deflections and ponderomotive self-focusing",
Phys. Rev. Lett. 118, 055002 (2017).
 
A. Colaïtis, S. Hüller, D. Pesme, G. Duchateau, and V. T. Tikhonchuk, "Crossed Beam Energy Transfer: assessment of the Paraxial Complex Geometrical Optics approach versus a time-dependent paraxial method to describe experimental results",

Phys. Plasmas 23, 032118 (2016); http://dx.doi.org/10.1063/1.4944496

 
S. Hüller and A. Porzio, 
"Weibull type speckle distributions as a result of saturation in stimulated scattering processes", 
Laser and Particle Beams 33, 667-678 (2015). weibull08Jun15LPB.pdf

P. E. Masson-Laborde , S. Hüller , D. Pesme , Ch. Labaune , S. Depierreux , P. Loiseau , and H. Bandulet
"Stimulated Brillouin Scattering reduction induced by self-focusing for a single speckle interacting with an expanding plasma",
Physics of Plasmas 21(3), 032703 (2014).

Stefan Hüller and Bedros Afeyan 
“Simulations of drastically reduced SBS with laser pulses composed of a Spike Train of Uneven Duration and Delay (STUD pulses)”, (IFSA 2011), 
EPJ Web of Conferences 59, 05010 (2013); DOI: http://dx.doi.org/10.1051/epjconf/20135905010

Bedros Afeyan and Stefan Hüller 
“Optimal control of laser plasma instabilities using Spike Trains of Uneven Duration and Delay (STUD Pulses) for ICF and IFE”, (IFSA 2011), 
EPJ Web of Conferences 59, 05009 (2013); DOI: http://dx.doi.org/10.1051/epjconf/20135905009

S. Hüller, A. Porzio and J. Robiche,
"Order statistics of high-intensity speckles in stimulated Brillouin scattering and plasma-induced laser beam smoothing"
New Journal of Physics 15, 025003 (2013)
doi:10.1088/1367-263/15/2/025003  http://iopscience.iop.org/1367-2630...

Th. Chapman, S. Hüller, P.E. Masson-Laborde, A. Héron, D. Pesme, and W. Rozmus, 
“Driven spatially autoresonant stimulated Raman scattering in the kinetic regime”, 
Phys. Rev. Lett. 108, 145003 (2012).

R. Ramis, K. Eidmann, J. Meyer-ter-Vehn, and S. Hüller, 
"MULTIFS - A Computer Code for Laser-Plasma Interaction in the Femtosecond Regime". 
Computer Phys. Communications 183, 637-655 (2012), 
http://www.sciencedirect.com/scienc...  doi:10.1016/j.cpc.2011.10.016

Th. Chapman, S. Hüller, P.E. Masson-Laborde, W. Rozmus and D. Pesme, 
“Spatially autoresonant stimulated Raman scattering in inhomogeneous plasmas in the kinetic regime”, 
Phys. Plasmas 17(12), 122317 (2010).

S. Hüller, A. Porzio 
“Order statistics and extremal properties of spatially smoothed laser beams”, 
Laser and Particle Beams 28(3), 463-477 (2010).

A. Porzio, S. Hüller 
“Extremal properties for weakly correlated random variables arising in speckle patterns”, 
J. Statist. Phys. 138, 1010 (2010). http://springerlink.com/content/k4g...

L. Lancia, J.-R. Marques, M. Nakatsutsumi, C. Riconda, S. Weber, S. Hüller, et al.,, 
“Experimental Evidence of Short Light Pulse Amplification Using Strong-Coupling Stimulated Brillouin Scattering in the Pump Depletion Regime”, 
Phys. Rev. Lett. 104, 025001 (2010).

Hüller S., Masson-Laborde P. E., Pesme D., Casanova M., Detering F., Maximov A. 
Harmonic decomposition to describe the nonlinear evolution of Stimulated Brillouin Scattering. 
Physics of Plasmas 2006; 13: 22703.

K. Eidmann, J. Meyer-ter-Vehn, T. Schlegel, and S. Hüller, 
Hydro code simulation of sub-picosecond laser interaction with solid-density matter; 
Phys. Rev. E 62(1), 1202 (2000).

S. Hüller, 
`Stimulated Brillouin scattering off nonlinear ion acoustic waves’; 
Phys. Fluids B 3(12), 3317 (1991).

S. Hüller, P. Mulser and A.M. Rubenchik, 
`Nonstationary stimulated Brillouin scattering’; 
Phys. Fluids B 3(12), 3339 (1991).

`Stimulated Brillouin scattering off nonlinear ion acoustic waves’ ; Phys. Fluids B 3(12), 3317 (1991).

Preprint to Laser and Particle Beams 28, 463-477 (2010)
  

 

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