Prospects of "water-window" X-ray emission from subpicosecond laser plasmas

Андреев, А. А.; Teubner, U.; Kurnin, I. V.; Förster, E.

doi:10.1007/s003400050853

Cited by 15 publications

(10 citation statements)

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“…This means, in our situation, the bremsstrahlung emission increases slightly faster than line emissions with laser pulse energy. In Andreev's work, 12 with 700 fs, 248 nm laser pulses interacting with carbon, the experiment also yielded ␥ tot Ͼ␥ line . In the low pulse energy range up to 100 J ͓three left-most squares in Fig.…”

mentioning

confidence: 76%

Dependence of hard x-ray yield on laser pulse parameters in the wavelength-cubed regime

Hou

Nees

Theobald

et al. 2004

Applied Physics Letters

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Conversion efficiency and electron temperature scaling laws are experimentally studied in the wavelength-cubed (λ3) regime, where a single-wavelength focus allows low energy pulses incident on a Mo target to produce x rays with excellent efficiency and improved spatial coherence. Focused intensity is varied from 2×1016 to 2×1018 W/cm2. Conversion efficiency and electron temperature are best described by a power law for energy scaling while an exponential law best describes the scaling of these parameters with pulse duration.

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mentioning

confidence: 76%

Dependence of hard x-ray yield on laser pulse parameters in the wavelength-cubed regime

Hou

Nees

Theobald

et al. 2004

Applied Physics Letters

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“…The analytical results are compared with the ones of numerical simulation [4] at the following conditions: the carbon foils are radiated by the normally incident laser pulse of I) pulse duration z=700 fs, wavelength )t=248 nm, intensity IolObo W/cm2 and II) -v=500 fs, =3O8 nm, Io=1016 W/cm2. The corresponding dependencies of a laser energy conversion in emission of Ly-a line are shown at fig.…”

Section: Laser-foil Interactionmentioning

confidence: 99%

<title>Enhancing line emission from subpicosecond laser-produced plasma</title>

Kurnin

Akulinichev

2004

SPIE Proceedings

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“…Thus various efforts have been made to improve the laser pulse absorption which plays a key role in laser target interaction in general and also the coupling efficiency, related to the emission. Among those efforts, there are examples of the strong increase of XR emission by the application of double pulses [1][2][3], changes of the contrast ratio (main laser pulse to background or uncontrolled prepulses from the amplifier system) [4][5][6], the optimization of the angle of incidence [7], the target thickness [8] and the target material [9,10], all those performed in the intensity range of I 0 ≈10 15 to 10 18 W/cm 2 , where I 0 is the laser intensity in the peak of the pulse. In a similar way the yield of HEP emission has also been improved in the same or higherintensity range [11].…”

Section: Introductionmentioning

confidence: 99%

Towards optimization of femtosecond laser pulse nanostructuring of targets for high-intensity laser experiments in vacuum

et al. 2021

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The interaction of intense femtosecond laser pulses with solid targets is a topic that has attracted a large amount of interest in science and applications. For many of the related experiments a large energy deposition or absorption as well as an efficient coupling to extreme ultraviolet (XUV), X-ray photon generation, and/or high energy particles is important. Here, much progress has been made in laser development and in experimental schemes, etc. However, regarding the improvement of the target itself, namely its geometry and surface, only limited improvements have been reported. The present paper investigates the formation of laser-induced periodic surface structures (LIPSS or ripples) on polished thick copper targets by femtosecond Ti:sapphire laser pulses. In particular, the dependence of the ripple period and ripple height has been investigated for different fluences and as a function of the number of laser shots on the same surface position. The experimental results and the formation of ripple mechanisms on metal surfaces in vacuum by femtosecond laser pulses have been analysed and the parameters of the experimentally observed “gratings” interpreted on base of theoretical models. The results have been specifically related to improve high-intensity femtosecond-laser matter interaction experiments with the goal of an enhanced particle emission (photons and high energy electrons and protons, respectively). In those experiments the presently investigated nanostructures could be generated easily in situ by multiple pre-pulses irradiated prior to a subsequent much more intense main laser pulse.

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Prospects of "water-window" X-ray emission from subpicosecond laser plasmas

Cited by 15 publications

References 1 publication

Dependence of hard x-ray yield on laser pulse parameters in the wavelength-cubed regime

Dependence of hard x-ray yield on laser pulse parameters in the wavelength-cubed regime

<title>Enhancing line emission from subpicosecond laser-produced plasma</title>

Towards optimization of femtosecond laser pulse nanostructuring of targets for high-intensity laser experiments in vacuum

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