Relativistic and charge-displacement self-channeling of intense ultrashort laser pulses in plasmas

Borisov, A. B.; Borovskiy, A. V.; Shiryaev, O. B.; Korobkin, V. V.; Prokhorov, A. M.; Solem, J. C.; Luk, T. S.; Boyer, K.; Rhodes, C. K.

doi:10.1103/physreva.45.5830

Cited by 292 publications

(195 citation statements)

References 28 publications

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“…As mentioned above, P c P 0 P u is required for self-focusing. When I 0 = 10 19 Wcm −2 , this gives that n e n L,19 = 0.077n c (λ 2 /r 2 0 ) = 1.8n L according to Equations (13) and (14). This prediction is confirmed by Figure 5.…”

Section: Verification Of the Theoretic Results By Pic Simulationssupporting

confidence: 76%

“…For this purpose, one needs to derive the ponderomotive force in a highly relativistic case. Note that the ponderomotive force have been derived in weak and moderate relativistic cases with the electron longitudinal velocity not so close to c [12,14,20,35,36] . Here, we try to derive the ponderomotive force expressed approximately by the laser parameters in a highly relativistic case, where the longitudinal electron momentum may be much larger than the transverse one.…”

Section: Upper-limit Laser Power and Lower-limit Plasma Densitymentioning

confidence: 99%

“…Selffocusing of an ultrashort intense laser pulse in a tenuous plasma was investigated theoretically in Refs. [11][12][13][14][15], and the well-known critical laser power P c = 17(n c /n e ) GW required for self-focusing was found [13,14] , where n e is the plasma electron density, n c = mω 2 /4π e 2 is the critical density, and ω is the laser frequency. Since then, there have been a lot of studies on this topic when the laser power is around P c , e.g., laser channeling in underdense plasmas [16][17][18] , laser guiding in plasma channels [19,20] , and propagation of multi-laser beams in plasmas [21][22][23][24] .…”

Section: Introductionmentioning

confidence: 99%

“…Usually, these applications require that intense laser pulses can stably propagate over a large distance in plasma. On this issue, many theoretical and experimental studies have been performed in the last 30 years [11][12][13][14][15][16][17][18][19][20][21][22][23][24] . Selffocusing of an ultrashort intense laser pulse in a tenuous plasma was investigated theoretically in Refs.…”

Section: Introductionmentioning

confidence: 99%

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Upper-limit power for self-guided propagation of intense lasers in underdense plasma

Wang

Sheng

et al. 2013

High Pow Laser Sci Eng

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It is found that there is an upper-limit critical power for self-guided propagation of intense lasers in plasma in addition to the well-known lower-limit critical power set by the relativistic effect. Above this upper-limit critical power, the laser pulse experiences defocusing due to expulsion of local plasma electrons by the transverse ponderomotive force. Associated with the upper-limit power, a lower-limit critical plasma density is also found for a given laser spot size, below which self-focusing does not occur for any laser power. Both the upper-limit power and the lower-limit density are derived theoretically and verified by two-dimensional particle-in-cell simulations. The present study provides new guidance for experimental designs, where self-guided propagation of lasers is essential.

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Section: Verification Of the Theoretic Results By Pic Simulationssupporting

confidence: 76%

Section: Upper-limit Laser Power and Lower-limit Plasma Densitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Upper-limit power for self-guided propagation of intense lasers in underdense plasma

Wang

Sheng

et al. 2013

High Pow Laser Sci Eng

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“…24 For the relativistic self-focusing to dominate over diffraction the well known condition P L Ͼ P c has to be fulfilled with P L the laser beam power and P c Ϸ16.4( L 2 / p 2 ) GW the critical power for a given electron density and laser frequency. 20,[25][26][27][28] The ponderomotive contribution to self-focusing is generally stronger than the relativistic but not instantaneous. This is because it is associated with charge displacement which involves an inertial response.…”

Section: A Self-focusing and Channel Formationmentioning

confidence: 99%

Generation of MeV electrons and positrons with femtosecond pulses from a table-top laser system

Gahn¹,

Tsakiris²,

Pretzler³

et al. 2002

Physics of Plasmas

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In experiments, the feasibility was demonstrated of generating multi-MeV electrons in a form of a collimated beam utilizing a table-top laser system delivering 200 fs pulses with P L ϭ1.2 TW and 10 Hz capability. The method uses the process of relativistic self-channeling in a high-density gas jet producing electron densities in the range of 3ϫ1019 -6ϫ10 20 cm Ϫ3 . In a thorough investigation, angularly resolved and absolutely calibrated electron spectra were measured and their dependence on the plasma density, laser intensity, and gas medium was studied. For the optimum electron density of n e ϭ2ϫ10 20 cm Ϫ3 the effective temperature of the electron energy distribution and the channel length exhibit a maximum of 5 MeV and 400 m respectively. The laser-energyto-MeV-electron efficiency is estimated to be 5%. In a second step, utilizing the multi-MeV electron beam anti-particles, namely positrons, were successfully generated in a 2 mm Pb converter. The average intensity of this new source of positrons is estimated to be equivalent to a radioactivity of 2ϫ10 8 Bq and it exhibits a very favorable scaling for higher laser intensities.

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Experimental Study of Hard X‐Ray Production at Sub‐Relativistic Intensities: Effect of Polarization and Nanosecond Pre‐Pulse

Bolshakov

Vorobiev

Volkov

et al. 2009

Contrib. Plasma Phys.

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Relativistic and charge-displacement self-channeling of intense ultrashort laser pulses in plasmas

Cited by 292 publications

References 28 publications

Upper-limit power for self-guided propagation of intense lasers in underdense plasma

Upper-limit power for self-guided propagation of intense lasers in underdense plasma

Generation of MeV electrons and positrons with femtosecond pulses from a table-top laser system

Experimental Study of Hard X‐Ray Production at Sub‐Relativistic Intensities: Effect of Polarization and Nanosecond Pre‐Pulse

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