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- W2890176774 abstract "The Mars Organic Molecule Analyzer (MOMA) is a miniature ion trap mass spectrometer designed for the upcoming ExoMars Rover mission <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>1</sup> . The spectrometer uses laser desorption to ionize a Martian soil sample within a clean zone maintained at ambient Martian pressure. A high speed aperture valve transiently opens to allow ionized constituents along with the ambient gas to enter a vacuum cavity containing a linear ion trap mass spectrometer. The ambient clean zone and the vacuum cavity are connected via a few cm long aperture ion guide tube. In this paper, we present results from a recently completed numerical investigation of ion transport from the ion source across the ion guide. Specifically, we focus on collisional coupling between ions and the neutral molecules flowing into the vacuum cavity. The simulation domain contains the ambient region and we consider the variation in ion conductance with ambient pressure. We also analyze the impact of a fixed potential bias applied to the aperture valve. Simulations are performed with a two-dimensional axisymmetric PIC / DSMC code Starfish2. Numerical results are compared to experimental data." @default.
- W2890176774 created "2018-09-27" @default.
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- W2890176774 date "2018-06-24" @default.
- W2890176774 modified "2023-10-18" @default.
- W2890176774 title "Numerical Investigation of Ion Transport in the Moma Ion Mass Spectrometer" @default.
- W2890176774 doi "https://doi.org/10.1109/icops35962.2018.9575736" @default.
- W2890176774 hasPublicationYear "2018" @default.
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