Des résultats récents sur l'accélération d'électrons par collision d'impulsions laser intenses et contre propagatives sont présentés. À la collision, l'interférence des deux impulsions conduit à la génération d'une onde stationnaire qui pré-accélère les électrons du plasma qui, par la suite pourront être piégés dans l'onde de sillage. Les diagnostics optiques de la région de collision mettent en évidence des signatures de la présence de cette onde stationnaire. Une revue des résultats d'accélération d'électrons est ensuite présentée : l'utilisation de la technique d'injection par collision d'impulsions permet la production de faisceaux d'électrons stables, réglables et de haute qualité dans la gamme d'énergie 100–200 MeV. Les simulations PIC en trois dimensions révèlent le rôle important de la dynamique nonlinéaire de la propagation du faisceau pompe et son impact sur les performances de l'accélérateur. La prise en compte de ces effets nous a permis d'optimiser la charge à haute énergie du faisceau d'électrons.
We report on recent experimental results on electron acceleration using two counter-propagating ultrashort and ultraintense laser pulses. At the collision, the two pulses drive a standing wave which is able to pre-accelerate plasma electrons which can then be trapped in the plasma wave. Optical diagnostics of the collision reveal signatures of this standing wave. Electron acceleration results in this regime are reviewed: the use of colliding pulses enables the generation of stable, tunable and high quality electron beams at the 100–200 MeV level. Detailed comparisons with 3D Particle in Cell (PIC) simulations give deeper insight on the role of the nonlinear propagation of the pump pulse on the performance of the accelerator. This deeper understanding has allowed us to optimize the beam charge of the accelerator at high energy.
Mot clés : Interaction laser–plasma, Accélération d'électrons, Collision d'impulsions laser
Jérôme Faure 1 ; Clément Rechatin 1 ; Ahmed Ben-Ismail 1, 2 ; Jaeku Lim 1 ; Xavier Davoine 3 ; Erik Lefebvre 3 ; Victor Malka 1
@article{CRPHYS_2009__10_2-3_148_0, author = {J\'er\^ome Faure and Cl\'ement Rechatin and Ahmed Ben-Ismail and Jaeku Lim and Xavier Davoine and Erik Lefebvre and Victor Malka}, title = {Physics of colliding laser pulses in underdense plasmas}, journal = {Comptes Rendus. Physique}, pages = {148--158}, publisher = {Elsevier}, volume = {10}, number = {2-3}, year = {2009}, doi = {10.1016/j.crhy.2009.03.006}, language = {en}, }
TY - JOUR AU - Jérôme Faure AU - Clément Rechatin AU - Ahmed Ben-Ismail AU - Jaeku Lim AU - Xavier Davoine AU - Erik Lefebvre AU - Victor Malka TI - Physics of colliding laser pulses in underdense plasmas JO - Comptes Rendus. Physique PY - 2009 SP - 148 EP - 158 VL - 10 IS - 2-3 PB - Elsevier DO - 10.1016/j.crhy.2009.03.006 LA - en ID - CRPHYS_2009__10_2-3_148_0 ER -
%0 Journal Article %A Jérôme Faure %A Clément Rechatin %A Ahmed Ben-Ismail %A Jaeku Lim %A Xavier Davoine %A Erik Lefebvre %A Victor Malka %T Physics of colliding laser pulses in underdense plasmas %J Comptes Rendus. Physique %D 2009 %P 148-158 %V 10 %N 2-3 %I Elsevier %R 10.1016/j.crhy.2009.03.006 %G en %F CRPHYS_2009__10_2-3_148_0
Jérôme Faure; Clément Rechatin; Ahmed Ben-Ismail; Jaeku Lim; Xavier Davoine; Erik Lefebvre; Victor Malka. Physics of colliding laser pulses in underdense plasmas. Comptes Rendus. Physique, Volume 10 (2009) no. 2-3, pp. 148-158. doi : 10.1016/j.crhy.2009.03.006. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2009.03.006/
[1] Laser electron accelerator, Phys. Rev. Lett., Volume 43 (1979) no. 4, p. 267
[2] et al. Transverse-wake wave breaking, Phys. Rev. Lett., Volume 78 (1997) no. 22, pp. 4205-4208
[3] Laser wake field acceleration: the highly non-linear broken-wave regime, Appl. Phys. B, Volume 74 (2002), pp. 355-361
[4] et al. Nonlinear theory for relativistic plasma wakefields in the blowout regime, Phys. Rev. Lett., Volume 96 (2006), p. 165002 http://link.aps.org/abstract/PRL/v96/e165002 ([Online]. Available:)
[5] et al. Monoenergetic beams of relativistic electrons from intense laser–plasma interactions, Nature, Volume 431 (2004), pp. 535-538
[6] et al. High quality electron beams from a laser wakefield accelerator using plasma-channel guiding, Nature, Volume 431 (2004), pp. 538-541
[7] et al. A laser–plasma accelerator producing monoenergetic electron beams, Nature, Volume 431 (2004), pp. 541-544
[8] et al. GeV electron beams from a centimeter-scale accelerator, Nat. Phys., Volume 2 (2006), pp. 696-699
[9] et al. Generation of stable, low-divergence electron beams by laser-wakefield acceleration in a steady-state-flow gas cell, Phys. Rev. Lett., Volume 101 (2008) no. 8 ([Online]. Available:) | DOI
[10] et al. On the stability of laser wakefield electron accelerators in the monoenergetic regime, Phys. Plasmas, Volume 14 ( May 2007 ) no. 5, p. 056702
[11] et al. Stable generation of GeV-class electron beams from self-guided laser–plasma channels, Nat. Photonics, Volume 2 ( Sep. 2008 )
[12] et al. Trapped electron acceleration by a laser-driven relativistic plasma wave, Nature, Volume 368 (1994), pp. 527-529
[13] et al. Observation of laser wakefield acceleration of electrons, Phys. Rev. Lett., Volume 81 (1998), p. 995
[14] et al. Particle injection into the wave acceleration phase due to nonlinear wake wave breaking, Phys. Rev. E, Volume 58 ( Nov. 1998 ) no. 5, p. R5257-R5260
[15] et al. Plasma-density-gradient injection of low absolute-momentum-spread electron bunches, Phys. Rev. Lett., Volume 100 (2008), p. 215004
[16] et al. A laser-accelerator injector based on laser ionization and ponderomotive acceleration of electrons, Phys. Rev. Lett., Volume 82 ( Feb. 1999 ) no. 8, pp. 1688-1691
[17] Laser injection of ultrashort electron pulses into wakefield plasma waves, Phys. Rev. Lett., Volume 76 (1996), p. 2073
[18] et al. Electron injection into plasma wake fields by colliding laser pulses, Phys. Rev. Lett., Volume 79 (1997), p. 2682
[19] et al. Computer simulations of cathodeless, high-brightness electron-beam production by multiple laser beams in plasmas, Phys. Rev. E, Volume 57 ( May 1998 ) no. 5, pp. 5920-5928
[20] et al. Beatwave injection of electrons into plasma waves using two interfering laser pulses, Phys. Rev. E, Volume 70 (2004), p. 016402
[21] et al. Head-on injection of a high quality electron beam by the interaction of two laser pulses, Rev. Sci. Instrum., Volume 72 (2004), pp. 2961-2965
[22] et al. Controlled injection and acceleration of electrons in plasma wakefields by colliding laser pulses, Nature, Volume 444 (2006), pp. 737-739
[23] et al. Controlled electron injection in a laser–plasma accelerator, Plasma Phys. Controlled Fusion, Volume 49 (2007), p. B395-B402
[24] Threshold for electron heating by two electromagnetic waves, Phys. Rev. A, Volume 28 (1983) no. 6, pp. 3592-3598
[25] et al. Stochastic heating and acceleration of electrons in colliding laser fields in plasma, Phys. Rev. Lett., Volume 88 (2002) no. 5, p. 055004
[26] Stochastic heating in ultra high intensity laser–plasma interaction, Physica D Nonlinear Phenomena, Volume 206 (2005), pp. 1-31
[27] G. Fubiani, Controlled electron injection into plasma accelerators and space charge estimates, Thèse de doctorat, Université Paris XI Orsay, 2005
[28] et al. Absolute calibration for a broad range single shot electron spectrometer, Rev. Sci. Instrum., Volume 77 (2006), p. 103301
[29] Collision of two short laser pulses in plasma and the generation of short lived Bragg mirrors, Sov. Phys. JETP, Volume 93 (2001), pp. 510-518
[30] et al. An optical trap for relativistic plasma, Phys. Plasmas, Volume 10 (2003), p. 2093
[31] et al. Demonstration of laser-frequency upshift by electron-density modulations in a plasma wakefield, Phys. Rev. Lett., Volume 99 (2007) no. 13, p. 135001 http://link.aps.org/abstract/PRL/v99/e135001 ([Online]. Available:)
[32] et al. Measurements of wave-breaking radiation from a laser-wakefield accelerator, Phys. Rev. Lett., Volume 98 (2007) no. 5, p. 054802 http://link.aps.org/abstract/PRL/v98/e054802 ([Online]. Available:)
[33] et al. Quasimonoenergetic electron beams produced by colliding cross-polarized laser pulses in underdense plasmas, New J. Phys., Volume 11 (2009), p. 013011
[34] et al. Simulation of quasimonoenergetic electron beams produced by colliding pulse wakefield acceleration, Phys. Plasmas, Volume 15 (2008), p. 113102
[35] et al. Generation of ultra-intense single-cycle laser pulses by using photon deceleration, Proc. Nat. Acad. Sci., Volume 99 (2002) no. 1, pp. 29-32
[36] et al. Observation of laser pulse shortening in nonlinear plasma waves, Phys. Rev. Lett., Volume 95 (2005), p. 205003
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