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sshade:databases:ghosst:micro_spectro-gonio_radiometer [2017/10/11 08:10] – Bernard Schmitt | sshade:databases:ghosst:micro_spectro-gonio_radiometer [2017/10/11 08:10] (current) – Bernard Schmitt | ||
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+ | ==== SHADOWS Micro Spectro-Gonio Radiometer ==== | ||
+ | ---- | ||
+ | === Laboratory Experiment facility === | ||
+ | |||
+ | **Facility name: | ||
+ | |||
+ | Micro Spectro-Gonio Radiometer | ||
+ | |||
+ | **Location: | ||
+ | Institut de Planétologie et Astrophysique de Grenoble (IPAG) | ||
+ | |||
+ | CNRS - Université Grenoble Alpes | ||
+ | |||
+ | Saint Martin d’Hères, France | ||
+ | |||
+ | **Persons in charge:** | ||
+ | |||
+ | - Scientific : Pierre Beck, Assistant Professor | ||
+ | |||
+ | - Technical : Olivier Brissaud, Engineer | ||
+ | |||
+ | ---- | ||
+ | |||
+ | **General description** | ||
+ | |||
+ | The new micro spectro-gonio radiometer currently under developement will be optimized for the measurement at low temperature of bidirectional reflectance spectra, over the visible and near-IR (at least from 350 to 4800 nm), of dark and very small samples (organics, meteorites…) down to a few mm3 in volume. | ||
+ | |||
+ | [[sample holders]]: | ||
+ | |||
+ | It will have 2 major sample holder configurations: | ||
+ | |||
+ | - //Open sample holders// (various sizes) in //cold chamber// over -20°C ─ +20°C temperature range. | ||
+ | |||
+ | - The //SERAC environmental// | ||
+ | |||
+ | [[Tools and sub-systems]]: | ||
+ | |||
+ | A number of sample preparation tools and experiment sub-systems are available to the facility: | ||
+ | |||
+ | - For samples preparation: | ||
+ | |||
+ | - For the experiment: a thermodynamic volumetric system with high accuracy pressure gauges (10-6 to 1 bar), a flow meter (1-10 sccm) and pumps. He-Ne laser + detectors, camera for sample monitoring, … | ||
+ | |||
+ | ---- | ||
+ | |||
+ | **Technical characteristics: | ||
+ | |||
+ | [[Spectral range]] : 0.35 - 4.5 µm (< 0.35 & > 4.8 µm: lower S/N) (4.2-4.3µm: | ||
+ | |||
+ | [[Spectral resolution]] : variable | ||
+ | |||
+ | - mini: < 0.1 nm (but S/N limited) | ||
+ | |||
+ | - maxi: 3 nm (< | ||
+ | |||
+ | [[Bidirectional Reflectance]] | ||
+ | |||
+ | - '' | ||
+ | |||
+ | - '' | ||
+ | |||
+ | - '' | ||
+ | |||
+ | - '' | ||
+ | |||
+ | - '' | ||
+ | - '' | ||
+ | |||
+ | [[Photometry]]: | ||
+ | |||
+ | '' | ||
+ | |||
+ | - 0.35-1.0 µm: expected better than 1% over all configurations (relative to a calibrated Spectralon 0.99 reference panel) | ||
+ | |||
+ | - 1.0-2.5 µm: expected better than 1% over all configurations | ||
+ | |||
+ | - 2.5-4.5 µm : expected better than 2% over all configurations | ||
+ | |||
+ | '' | ||
+ | |||
+ | - better than 0.5% (0.35-4.5 µm) | ||
+ | |||
+ | |||
+ | [[File: | ||
+ | |||
+ | '' | ||
+ | |||
+ | |||
+ | [[Samples]] | ||
+ | |||
+ | '' | ||
+ | |||
+ | '' | ||
+ | |||
+ | '' | ||
+ | |||
+ | '' | ||
+ | |||
+ | - 32 mm diameter (for full BRDF down to 75° observation) | ||
+ | |||
+ | - 8 mm x 32 mm (for principal plane observation down to 75°) | ||
+ | |||
+ | - 8 mm x 16 mm (for principal plane observation down to 60°) | ||
+ | |||
+ | '' | ||
+ | |||
+ | - 0.1 mm for dark & fine grained samples (< 20 µm) | ||
+ | |||
+ | - up to 5 mm for ' | ||
+ | |||
+ | - up to 10 mm for bright & medium/fine grained samples (< 100 µm) | ||
+ | |||
+ | |||
+ | [[Temperature]]: | ||
+ | |||
+ | - room temperature or heated | ||
+ | |||
+ | - down to -20°C (in cold room) | ||
+ | |||
+ | - down to -40°C (in SERAC environmental cell) | ||
+ | |||
+ | |||
+ | [[Experiment control]]: | ||
+ | |||
+ | - PC/ | ||
+ | |||
+ | [[Acquisition time]]: | ||
+ | |||
+ | - typical: 1 mn for 200 spectral channels in visible (S/N dependent) | ||
+ | |||
+ | - total: <1 hour for 100 spectral channels and 100 geometries | ||
+ | |||
+ | [[Current state of system]]: | ||
+ | |||
+ | - Visible 0.3 - 1 µm range: under development, | ||
+ | |||
+ | - Infrared 1 - 4.8µm range: extension planned in 2015-2017 (if EPN2020-RI program accepted) | ||
+ | |||
+ | - low temperature: | ||
+ | |||
+ | * Characteristics: | ||
+ | |||
+ | * Article: | ||
+ | |||
+ | **Availability to community: | ||
+ | |||
+ | // | ||
+ | |||
+ | - Technical improvements/ | ||
+ | |||
+ | - IPAG + associated laboratories measurements (60%) | ||
+ | |||
+ | //**after 2017:**// | ||
+ | |||
+ | - Technical improvements/ | ||
+ | |||
+ | - IPAG + associated laboratories measurements (60%) | ||
+ | |||
+ | - open as facility or to specific collaborations w. funding (20%) | ||
+ | |||
+ | ---- | ||
+ | |||
+ | **References: |