1. Regolith effects in planetary X-ray fluorescence spectroscopy: Laboratory studies at 1.7–6.4keV
- Author
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James Carpenter, Aki Kallonen, Karri Muinonen, Marko Peura, Hannu Parviainen, George W. Fraser, and Jyri Näränen
- Subjects
Atmospheric Science ,Materials science ,010504 meteorology & atmospheric sciences ,Aerospace Engineering ,X-ray fluorescence ,Surface finish ,01 natural sciences ,Fluorescence spectroscopy ,Optics ,0103 physical sciences ,Surface roughness ,Porosity ,010303 astronomy & astrophysics ,0105 earth and related environmental sciences ,Spectrometer ,business.industry ,Astrophysics::Instrumentation and Methods for Astrophysics ,Astronomy and Astrophysics ,Regolith ,Computational physics ,Geophysics ,13. Climate action ,Space and Planetary Science ,Asteroid ,Physics::Space Physics ,General Earth and Planetary Sciences ,Astrophysics::Earth and Planetary Astrophysics ,business - Abstract
Laboratory measurements are presented to study the effects of the physical properties of regolith on planetary soft X-ray fluorescence spectroscopy. Two laboratory setups are used to independently measure these regolith effects using lunar regolith analog samples with three different particle-size ranges. Discussion is given on the data analysis. Some of the data may be valid only for qualitative conclusions. Analytical modelling is used to separate the effects expected for a plane-parallel and homogeneous medium from those of measured regolith analogs. The surface roughness and porosity of the regolith are observed to induce an enhancement of the higher-energy part of the spectrum as a function of the incidence angle. The enhancement is larger for rougher surfaces. A brief discussion is given on the relevance of this study for future planetary missions carrying soft X-ray spectrometers.
- Published
- 2009