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Impact ionization mass spectra of anorthite cosmic dust analogue particles

Hillier, J. K.; Postberg, F.; Sestak, S.; Srama, R.; Kempf, S.; Trieloff, M.; Sternovsky, Z. and Green, S. F. (2012). Impact ionization mass spectra of anorthite cosmic dust analogue particles. Journal of Geophysical Research, 117 E09002.

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Anorthite, the Ca-rich end-member of plagioclase feldspar, is a dominant mineral component of the Lunar highlands. Plagioclase feldspar is also found in comets, meteorites and stony asteroids. It is therefore expected to contribute to the population of interplanetary (and circumplanetary) dust grains within the solar system. After coating micron- and submicron-sized grains of Anorthite with a conductive layer of Platinum, the mineral was successfully accelerated to hypervelocity speeds in the Max Planck Institut für Kernphysik’s Van de Graaff accelerator. We present impact ionization mass spectra generated following the impacts of anorthite grains with a prototype mass spectrometer (the Large Area Mass Analyser, LAMA) designed for use in space, and discuss the behavior of the spectra with increasing impact energy. Correlation analysis is used to identify the compositions and sources of cations present in the spectra, enabling the identification of several molecular cations (e.g., CaAlO2, CaSiO2, Ca2AlO3/CaAlSi2O2) which identify anorthite as the progenitor bulk grain material.

Item Type: Journal Item
Copyright Holders: 2012 American Geophysical Union
ISSN: 2156-2202
Project Funding Details:
Funded Project NameProject IDFunding Body
Not SetNot SetSTFC (Science & Technology Facilities Council)
Not SetNot SetNASA
Extra Information: 16 pp.
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Related URLs:
Item ID: 34276
Depositing User: Simon Green
Date Deposited: 10 Sep 2012 08:18
Last Modified: 09 Dec 2018 04:15
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