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Article Dans Une Revue Optics Communications Année : 2014

Reply on the comment of the paper "New probing techniques of radiative shocks"

Résumé

Imaging the structure of a radiative shock is a challenging task as the high plasma densities produced need a short wavelength to penetrate the plasma, requiring highly sophisticated imaging techniques. In a recent paper (Stehlé et al., Opt. Commun. 285 (2012) 64–69 [1]) the feasibility of a novel imaging technique using an X-ray laser (XRL) at 21 nm with a pulse duration 0.15 ns was proved. The recorded image was attributed to a shock propagating with a velocity of ~60 km/s. This velocity is in agreement with measurements of the plasma self-emission using time and space resolved diode diagnostics, and also in qualitative agreement with 1D numerical simulations. However, due to the inhomogeneous reflectivity of the XUV imaging mirror and to the low number of XRL photons, the quality of the recorded image was insufficient to unambiguously identify the different shock regions. Thus, arguing an ad hoc spatial resolution of ~0.5 mm and a stepwise representation of the shock–piston system, the potential of the technique to observe a radiative precursor was contested (Busquet's comment (in press) [2]). In this reply we aim at clarifying different aspects of the experimental setup, spatial resolution and other questions raised in this comment in order to back up our findings together with their respective analysis and interpretations.
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Dates et versions

hal-01551667 , version 1 (30-06-2017)

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Chantal Stehlé, Michaela Kozlova, Jean Larour, Jaroslav Nejdl, Francisco Suzuki-Vidal, et al.. Reply on the comment of the paper "New probing techniques of radiative shocks". Optics Communications, 2014, 318, pp.226-230. ⟨10.1016/j.optcom.2013.12.006⟩. ⟨hal-01551667⟩
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