Measuring the electron density gradients of dense plasmas by deflectometry using short-wavelength probe

Nejdl, J.; Kozlová, M.; Mocek, Tomáš; Rus, B.

doi:10.1063/1.3525570

Cited by 12 publications

(4 citation statements)

References 19 publications

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“…A particular effort to diagnose precisely the plasma conditions has been conducted on PALS. This includes the high resolution x-ray spectroscopy [88] measuring the emission lines of chlorine dopant included in the plastic layer, the optical interferometry and a new diagnostics of plasma density based on the x-ray deflectometry [89].…”

Section: Experimental Parametersmentioning

confidence: 99%

Physics issues for shock ignition

et al. 2014

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The paper presents theoretical analysis and experimental results concerning the major physical issues in the shock ignition approach. These are: generation of a high amplitude shock in the imploding target, laser-plasma interaction physics in the conditions of high laser intensities needed for high amplitude shock excitation, symmetry and stability of the shock propagation, role of fast electrons in the symmetrization of the shock pressure and the fuel preheat. The theoretical models and numerical simulations are compared with the results of specially designed experiments on laser plasma interaction and shock excitation in plane and spherical geometries.

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Section: Experimental Parametersmentioning

confidence: 99%

Physics issues for shock ignition

et al. 2014

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“…Deflectometry is a simple probing technique sensitive to the plasma density gradients [20]. This technique is based on deformations of the Talbot pattern [21] of 2D grating that arise from distortions of the probe beam wavefront caused by refractive index gradients.…”

Section: Deflectometrymentioning

confidence: 99%

Hot and dense plasma probing by soft X-ray lasers

et al. 2018

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A: Soft X-ray lasers, due to their short wavelength, its brightness, and good spatial coherence, are excellent sources for the diagnostics of dense plasmas (up to 10 25 cm −3 ) which are relevant to e.g. inertial fusion. Several techniques and experimental results, which are obtained at the quasi-steady state scheme being collisionally pumped 21.2 nm neon-like zinc laser installed at PALS Research Center, are presented here; among them the plasma density measurement by a double Lloyd mirror interferometer, deflectometer based on Talbot effect measuring plasma density gradients itself, with a following ray tracing postprocessing. Moreover, the high spatial resolution (nm scale) plasma images can be obtained when soft X-ray lasers are used. K: Plasma diagnostics -interferometry, spectroscopy and imaging; Plasma diagnosticsprobes; Plasma generation (laser-produced, RF, x ray-produced) 1Corresponding author.

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“…Two planar collaborative experiments have already been conducted on European laser facilities but their analyses are still in progress. They both studied shock formation and laser-plasma interaction in well-characterized preformed plasmas (thanks to x-ray laser deflectometry for instance [31]) under laser intensities in the 10 15 -10 16 W cm −2 range. Shock pressures in the 10 Mbar range were measured at PALS, far below the estimated value notably because of 2D effects and a lack of shock sustainability.…”

Section: Shock Ignition Studiesmentioning

confidence: 99%

Studying ignition schemes on European laser facilities

et al. 2011

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Demonstrating ignition and net energy gain in the near future on MJ-class laser facilities will be a major step towards determining the feasibility of Inertial Fusion Energy (IFE), in Europe as in the United States. The current status of the French Laser MégaJoule (LMJ) programme, from the laser facility construction to the indirectly driven central ignition target design, is presented, as well as validating experimental campaigns, conducted, as part of this programme, on various laser facilities. However, the viability of the IFE approach strongly depends on our ability to address the salient questions related to efficiency of the target design and laser driver performances. In the overall framework of the European HiPER project, two alternative schemes both relying on decoupling target compression and fuel heating—fast ignition (FI) and shock ignition (SI)—are currently considered. After a brief presentation of the HiPER project's objectives, FI and SI target designs are discussed. Theoretical analysis and 2D simulations will help to understand the unresolved key issues of the two schemes. Finally, the on-going European experimental effort to demonstrate their viability on currently operated laser facilities is described.

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Measuring the electron density gradients of dense plasmas by deflectometry using short-wavelength probe

Cited by 12 publications

References 19 publications

Physics issues for shock ignition

Physics issues for shock ignition

Hot and dense plasma probing by soft X-ray lasers

Studying ignition schemes on European laser facilities

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