Regolith effects in planetary X-ray fluorescence spectroscopy: Laboratory studies at 1.7-6.4 keV

Näränen, Jyri; Carpenter, James; Parviainen, Hannu; Muinonen, Karri; Fraser, George; Peura, Marko; Kallonen, Aki
Bibliographical reference

Advances in Space Research, Volume 44, Issue 3, p. 313-322.

Advertised on:
8
2009
Number of authors
7
IAC number of authors
0
Citations
9
Refereed citations
8
Description
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.
Type