Laboratory measurements of the light scattered by clouds of solid particles by imaging technique

Hadamcik, Edith; Renard, Jean‐Baptiste; Levasseur-Regourd, Anny Chantal; Worms, Jean-Claude

doi:10.1007/978-3-540-74276-0_2

Cited by 9 publications

(13 citation statements)

References 70 publications

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“…The aircraft was operated by the Novespace company during campaigns funded by the French space agency CNES and the European space agency ESA. The measurements of the light scattered by the samples are obtained by the imaging polarimeter PROGRA2-vis (vis is for visible domain); the principle of measurements is presented in Figure 2; the technical details can be found in Renard et al (2002) and Hadamcik et al (2009a). The optical fiber is fixed on the vial which rotate with its stand, allowing to change the phase angle.…”

Section: Methodsmentioning

confidence: 99%

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Analogues of interplanetary dust particles to interpret the zodiacal light polarization

Hadamcik

Lasue

Levasseur-Regourd

et al. 2020

Planetary and Space Science

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Context: Some local properties of the dust particles that build the interplanetary dust cloud may be deduced from the light they scatter (with emphasize on their linear polarization). The ratio of organics (absorbing particles) to silicates (more transparent particles) was suggested through numerical simulations to reproduce the shape of the polarimetric phase curve and the decrease in polarization with decreasing solar distance. Aims: Reproducing these properties, through measurements on real dust particles lifted in microgravity conditions, in the PROGRA2 light scattering experiment. Using dust analogues with parameters similar to those derived from numerical simulations. Methods: Analogue particles, previously tested for the two main sources of dust in the inner interplanetary cloud (comets and asteroids) were used in the experiment. The ratio between fluffy aggregates and compact particles was kept constant. Five samples were studied, corresponding to mixtures with the organics / silicates ratio as defined in the numerical simulation Results: We show that we can reproduce by experimental simulations the polarimetric properties of particles present in the inner interplanetary dust cloud, i.e. their polarimetric phase curve in the symmetry plane at 1.5 au from the Sun and variations of polarization at a 90° phase angle as a function of the solar distance between 0.5 au and 1.5 au. The effect of the different parameters suggests a size distribution of the particles following a power law with coefficients of (-3 ± 0.5) for a size-range of 10-100 µm and (-4.4 ± 0.6) for a size range of 100-200 µm, with a steep cutoff at about 10 microns, a constant ratio of (35 ± 10) % in mass of fluffy aggregates versus compact particles and a decreasing ratio of organics with decreasing solar distance. Such results are discussed in the context of recent evidence on cometary dust particles from the Rosetta mission to a Jupiter family comet.

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Section: Methodsmentioning

confidence: 99%

“…A comparison of phase curves between comets, asteroids and the interplanetary dust cloud can be found in Hadamcik et al (2009a) showing two classes of comets and different asteroid types. Some results are given below.…”

Section: Observations Of the Solar Light Scattered By Dust Particlesmentioning

confidence: 99%

Analogues of interplanetary dust particles to interpret the zodiacal light polarization

Hadamcik

Lasue

Levasseur-Regourd

et al. 2020

Planetary and Space Science

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“…The instrument is dedicated to the study of dust clouds lifted in microgravity or by an air-draught in ground-based conditions. Details on the instrument can be found in Renard et al (2002) and Hadamcik et al (2009a). The light sources are two randomly polarized lasers (green ¼ 543.5 nm and red ¼ 632.8 nm).…”

Section: Experimental Light-scattering Setup (Progra 2 Instrument)mentioning

confidence: 99%

“…The vial containing the sample is on its stand and rotates with the fiber optics to change the phase angle a; the detectors (cameras) are fixed. (updated fromHadamcik et al, 2009a).…”

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confidence: 99%

Laboratory light-scattering measurements with Titan's aerosols analogues produced by a dusty plasma

Hadamcik

Renard

Alcouffe

et al. 2009

Planetary and Space Science

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“…The particles float freely for a few seconds and then progressively fall. This is studied by the PROGRA 2 -vis instrument (a detailed description of the instrument and the procedure is given in Hadamcik et al, 2009bHadamcik et al, , 2011. The light sources are randomly polarized lasers at 543.5 nm and 632.8 nm, with a beam diameter of about 2 mm.…”

Section: Progra 2 -Vis Instrument and Experimental Methodsmentioning

confidence: 99%

Optical properties of analogs of Titan’s aerosols produced by dusty plasma

et al. 2013

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Analogs of Titan's aerosols are produced in the laboratory as grains in a gas mixture, or as layers on a substrate. This production procedure enables the methane-nitrogen mixture composition to be changed. The aim of this paper is to understand the variations observed on the linear polarization of the scattered light as a function of the production conditions. The influence of the concentration of methane injected in the plasma will be discussed and compared with the previous work of Hadamcik et al. (2009a). The diameter of the grains are measured by SEM-FEG images. The decrease of absorption with increasing wavelength, measured by spectroscopic ellipsometry on layers, is observed for a decreasing initial methane ratio and analyzed in terms of an increasing 'amine' content in the materials. The phase function parameters of the linear polarization of the scattered light are discussed in terms of the diameters of the aggregates and of the constituent grains, and the variation of the refractive indices (mainly absorption). The polarization is found to be highly correlated with the constituent grain size. Finally, the experimental results are compared to polarization measurements from space of the Titan's atmosphere.

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Laboratory measurements of the light scattered by clouds of solid particles by imaging technique

Cited by 9 publications

References 70 publications

Analogues of interplanetary dust particles to interpret the zodiacal light polarization

Analogues of interplanetary dust particles to interpret the zodiacal light polarization

Laboratory light-scattering measurements with Titan's aerosols analogues produced by a dusty plasma

Optical properties of analogs of Titan’s aerosols produced by dusty plasma

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