Berlin 2018 – scientific programme
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MM: Fachverband Metall- und Materialphysik
MM 47: Poster Session II
MM 47.47: Poster
Wednesday, March 14, 2018, 18:30–19:45, Poster C
Temperaturefield-analysis of the vacuum chamber of the Planetary Emissivity Laboratory — •Maximilian Grove1, Jörn Helbert2, and Alessandro Maturilli3 — 1WWU Münster, Münster, Nordrhein-Westfalen — 2DLR, Berlin, Berlin — 3DLR, Köln, Nordrhein-Westfalen
The institute for planetary research of the german aerospace center [DLR] was commissioned to build the Mercury Radiometer and thermal Infrared Spectrometer [MERTIS] - an instrument for the BepiColombo mission to be launched in 2018 [1]. One task within this project was to measure spectra from heated samples in a vacuum chamber to simulate the high surface temperature and low pressure athmosphere of the Mercury for comparison [2]. The thermal behaviour of the vacuum chamber defines the signal-to-noise ratio. To estimate the influence of ambient radiation COMSOL accompanied with Finite-Element-Method [FEM] was used [3]. The geometry was simplified to a 2D-geometry due to calculation power. With the help of mesh analysis and multiple parameter sweeps an estimation of the model accuracy could be achieved. The results show expected thermal behaviour, high signal-to-noise ratios and can be used to further minimize unwanted radiation effects by changing emissivity values.
References: [1] European Space Agency, ESA - BepiColombo launch rescheduled, 25 November 2016. [2] Dr. Maturilli and Dr.rer.nat. Helbert, DLR, Characterization, testing, calibration, and validation of the Berlin emissivity database, doi: 10.1117/1.JRS.8.084985, 19 May 2014. [3] COMSOL Inc., Heat Transfer Module, 2017.