Table-top femtosecond soft X-ray laser by collisional ionization gating

Depresseux, Adrien; Oliva, Eduardo; Gautier, J.; Tissandier, F.; Nejdl, J.; Kozlová, M.; Maynard, G.; Goddet, Jean-Philippe; Tafzi, Amar; Lifschitz, A.; Kim, H. T.; Jacquemot, S.; Malka, Victor; Phuoc, K. Ta; Thaury, C.; Rousseau, P.; Iaquaniello, G.; Lefrou, T.; Flacco, Alessandro; Vodungbo, Boris; Lambert, Guillaume; Rousse, A.; Zeitoun, Philippe; Sebban, S.

doi:10.1038/nphoton.2015.225

Cited by 71 publications

(64 citation statements)

References 27 publications

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“…For instance, the possibility to generate intense 'slow' (v c) pulses could facilitate laserdriven acceleration of heavy particles, such as ions [37]. Fine tuning of the velocity around c could be beneficial for laser wakefield acceleration of relativistic electrons [30], or to avoid velocity mismatch effects in experiments involving the propagation of multiple pulses of different frequencies in a dispersive medium [38]. Backward propagation of the intensity peak could make it possible to revert the propagation of secondary emissions that normally only occur in the forward direction of the driving laser beam.…”

Section: Discussionmentioning

confidence: 99%

Controlling the velocity of ultrashort light pulses in vacuum through spatio-temporal couplings

Sainte-Marie¹,

Gobert²,

Quéré³

2017

Optica

162

103

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Due to their broad spectral width, ultrashort lasers provide new possibilities to shape light beams and control their properties, in particular through the use of spatio-temporal couplings. In this context, we present a theoretical investigation of the linear propagation of ultrashort laser beams that combine temporal chirp and a standard aberration known as longitudinal chromatism. When such beams are focused in a vacuum, or in a linear medium, the interplay of these two effects can be exploited to set the velocity of the resulting intensity peak to arbitrary values within the Rayleigh length, i.e. precisely where laser pulses are generally used. Such beams could find groundbreaking applications in the control of laser-matter interactions, in particular for laser-driven particle acceleration.

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Section: Discussionmentioning

confidence: 99%

Controlling the velocity of ultrashort light pulses in vacuum through spatio-temporal couplings

Sainte-Marie¹,

Gobert²,

Quéré³

2017

Optica

162

103

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“…From fusion dynamics in stars to terrestrial lightning events to new prospects for energy production 1,2 or novel light sources [3][4][5][6][7] , hot dense plasmas are of importance for an array of physical phenomena 8,9 . Due to the plethora of correlations in highly excited matter, direct probing of isolated dynamics remains challenging.…”

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confidence: 99%

Nonlinear ionization dynamics of hot dense plasma observed in a laser-plasma amplifier

et al. 2020

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Understanding the behaviour of matter under conditions of extreme temperature, pressure, density and electromagnetic fields has profound effects on our understanding of cosmologic objects and the formation of the universe. Lacking direct access to such objects, our interpretation of observed data mainly relies on theoretical models. However, such models, which need to encompass nuclear physics, atomic physics and plasma physics over a huge dynamic range in the dimensions of energy and time, can only provide reliable information if we can benchmark them to experiments under well-defined laboratory conditions. Due to the plethora of effects occurring in this kind of highly excited matter, characterizing isolated dynamics or obtaining direct insight remains challenging. High-density plasmas are turbulent and opaque for radiation below the plasma frequency and allow only near-surface insight into ionization processes with visible wavelengths. Here, the output of a high-harmonic seeded laser-plasma amplifier using eight-fold ionized krypton as the gain medium operating at a 32.8 nm wavelength is ptychographically imaged. A complex-valued wavefront is observed in the extreme ultraviolet (XUV) beam with high resolution. Ab initio spatio-temporal Maxwell–Bloch simulations show excellent agreement with the experimental observations, revealing overionization of krypton in the plasma channel due to nonlinear laser-plasma interactions, successfully validating this four-dimensional multiscale model. This constitutes the first experimental observation of the laser ion abundance reshaping a laser-plasma amplifier. The presented approach shows the possibility of directly modelling light-plasma interactions in extreme conditions, such as those present during the early times of the universe, with direct experimental verification.

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“…The final XRL pulse duration shall be close to the gain recovery time in order to reduce the ASE growth in the XRL plasma amplifier. As demonstrated by the seminal work of [19], ionization gating of the gain might not only help to reduce the gain lifetime to have a better matching of seed amplification and pumping dynamics but also will increase the dephasing rate and so the bandwidth of the amplifier. On the other hand, 1L1S shows optimal emission for 15ps short pump pulse duration, which is relatively large value.…”

Section: Resultsmentioning

confidence: 99%

One long and two short pumping pulses control for plasma x-ray amplifier optimization

Cojocaru¹,

Ungureanu²,

Banici³

et al. 2016

Opt. Express

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Development of efficient soft x-ray laser plasma amplifiers adapted to seeded operation, requires a better control over amplifier transverse spatial extent, brilliance control and gain lifetime. Here it is shown that pumping the plasma amplifier with one long and two short pump pulses (1L2S) provides advantages in terms of control for the specified parameters in the case of Ni-like Ag x-ray laser. Also, significant tunability of the gain lifetime in the 1L2S pumping scheme for Ne-like Ti x-ray laser is observed. Direct harmonics seeding and chirped harmonics seeding amplification approaches may benefit from the control of the gain lifetime, in terms of better use of the pump energy and as a way to reduce the amplified spontaneous emission in x-ray lasers.

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Table-top femtosecond soft X-ray laser by collisional ionization gating

Cited by 71 publications

References 27 publications

Controlling the velocity of ultrashort light pulses in vacuum through spatio-temporal couplings

Controlling the velocity of ultrashort light pulses in vacuum through spatio-temporal couplings

Nonlinear ionization dynamics of hot dense plasma observed in a laser-plasma amplifier

One long and two short pumping pulses control for plasma x-ray amplifier optimization

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