Harmonic generation in plasmas of different density gradients

Földeş, I; Bakos, J.; Bakonyi, Z.; Nagy, Tamás; Szatmàri, S.

doi:10.1016/s0375-9601(99)00376-x

Cited by 24 publications

(10 citation statements)

References 20 publications

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“…We have to mention that the highest absorption with a remarkable maximum at the 45° angle of incidence [23] can be explained by resonant absorption [33], by an assumption of λ /L = 0.22 scalelength, which is typical for the contrast in those experiments. It is interesting that this scalelength for the same angle of incidence was found to be optimal for surface harmonics generation [34].…”

Section: Discussionmentioning

confidence: 99%

Reflectivity and spectral shift from laser plasmas generated by high-contrast, high-intensity KrF laser pulses

Kovács

Bali

Gilicze

et al. 2020

Phil. Trans. R. Soc. A.

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The energy and spectrum of the reflected 248 nm radiation are studied from solid targets up to 1.15 × 10 18 W cm −2 intensity. The experiments used the 700 fs directly amplified pulses of the KrF system which was cleaned from prepulses with the new Fourier-filtering method providing 12 orders of magnitude temporal contrast. Increasing the intensity from 10 15 W cm −2 results in increasing absorption up to more than 90% above 10 18 W cm −2 . This is accompanied by increasing x-ray conversion exhibiting a less steep power law dependence for low-Z matter than for gold. Strong blue shift of the reflected radiation from the backward propagating plasma was observed. It is shown that in the case of KrF laser pulses of highest contrast, vacuum heating can be one of the dominant absorption mechanisms. This article is part of a discussion meeting issue ‘Prospects for high gain inertial fusion energy (part 1)’.

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Section: Discussionmentioning

confidence: 99%

Reflectivity and spectral shift from laser plasmas generated by high-contrast, high-intensity KrF laser pulses

Kovács

Bali

Gilicze

et al. 2020

Phil. Trans. R. Soc. A.

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“…Propagation of short intense laser pulses through plasma is related to wide range of applications such as plasma based accelerator [1][2][3][4], optical harmonic generation [5,6], X-ray lasers [7,8], new radiation sources [9][10][11][12] and inertial confinement fusion with fast ignitor scheme [13,14]. This has given a boost to study propagation characteristics of high power lasers in plasma medium.…”

Section: Introductionmentioning

confidence: 99%

Self-focusing of super-Gaussian laser beam inmagnetized plasma under relativistic and ponderomotive regime

Gill

Kaur

Mahajan

2015

Optik

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“…Theoretical and experimental study of evolution of high power laser beams as they propagate through plasmas is an active area of research due to their potential relevance in plasma based accelerators (Sarkisov et al, 1999), inertial confinement fusion (Tabak et al, 1994;Regan et al, 1999), ionospheric modification (Perkins & Goldman, 1981;Gondarenko et al, 2005), and new radiation sources (Suckewer & Skinner, 1990Foldes et al, 1999;Fedotov et al, 2000). For success of these applications, a long propagation distance of intense lasers in plasma is desirable.…”

Section: Introductionmentioning

confidence: 99%

Relativistic self-focusing of super-Gaussian laser beam in plasma with transverse magneticfield

et al. 2012

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This paper presents an investigation of a self-consistent, theoretical model, which explains the ring formation in a superGaussian laser beam propagating in plasma with transverse magnetic field, characterized by relativistic nonlinearity. Higher order terms (up to r 4 ) in the expansion of the dielectric function and the eikonal have been taken into account. The condition for the formation of a dark and bright ring has been used to study focusing/defocusing of the beam. It is seen that inclusion of higher order terms does significantly affect the dependence of beam width parameter on the distance of propagation. Self-focusing of super-Gaussian beam is studied at various values of super-Gaussian coefficient, m and magnetic field. Further, we have studied some distinct features of critical power curves for varying values of magnetic field.

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Harmonic generation in plasmas of different density gradients

Cited by 24 publications

References 20 publications

Reflectivity and spectral shift from laser plasmas generated by high-contrast, high-intensity KrF laser pulses

Reflectivity and spectral shift from laser plasmas generated by high-contrast, high-intensity KrF laser pulses

Self-focusing of super-Gaussian laser beam inmagnetized plasma under relativistic and ponderomotive regime

Relativistic self-focusing of super-Gaussian laser beam in plasma with transverse magneticfield

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