The Mars Organic Molecule Analyzer (MOMA) investigation is a key astrobiology experiment scheduled to launch on the joint ESA-Roscosmos ExoMars 2018 rover mission. MOMA will examine the chemical composition of geological samples acquired from depths of up to two meters below the martian surface, where fragile organic molecules may be protected from destructive cosmic radiation and/or oxidative chemical reactions. The heart of the MOMA mass spectrometer subsystem (i.e., MOMA-MS) is a miniaturized linear ion trap (LIT) that supports two distinct modes of operation to detect: i) volatile and semi-volatile, low-to-moderate mass organics (≤500 Da) via pyrolysis coupled with gas chromatography mass spectrometry (pyr/GCMS); and, ii) more refractory, moderate-to-high mass compounds (up to 1000 Da) via laser desorption (LDMS) at ambient Mars pressures. Additionally, the LIT mass analyzer enables selective ion trapping via multi-frequency waveform ion excitation (e.g., stored waveform inverse Fourier transform, or SWIFT), and structural characterization of complex molecules using tandem mass spectrometry (MS/MS). A high-fidelity Engineering Test Unit (ETU) of MOMA-MS, including the LIT subassembly, dual-gun electron ionization source, micropirani pressure gauge, solenoid-driven aperture valve, redundant detection chains, and control electronics, has been built and tested at NASA GSFC under relevant operational conditions (pressure, temperature, etc.). Spaceflight qualifications of individual hardware components and integrated subassemblies have been validated through vibration, shock, thermal, lifetime, and performance evaluations. The ETU serves as a pathfinder for the flight model buildup, integration and test, as the ETU meets the form, fit and function of the flight unit that will be delivered to MPS in late 2015. To date, the ETU of MOMA-MS has been shown to meet or exceed all functional requirements, including mass range, resolution, accuracy, instrumental drift, and limit-of-detection specifications, thereby enabling the primary science objectives of the MOMA investigation and ExoMars 2018 mission.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Design and demonstration of the Mars Organic Molecule Analyzer (MOMA) on the ExoMars 2018 rover


    Beteiligte:
    Arevalo, Ricardo (Autor:in) / Brinckerhoff, William (Autor:in) / van Amerom, Friso (Autor:in) / Danell, Ryan (Autor:in) / Pinnick, Veronica (Autor:in) / Xiang Li (Autor:in) / Getty, Stephanie (Autor:in) / Hovmand, Lars (Autor:in) / Grubisic, Andrej (Autor:in) / Mahaffy, Paul (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    01.03.2015


    Format / Umfang :

    2946812 byte




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Mars Organic Molecule Analyzer (MOMA) mass spectrometer for ExoMars 2018 and beyond

    Brinckerhoff, William B. / Pinnick, Veronica T. / van Amerom, Friso H. W. et al. | IEEE | 2013


    Rover Exomars im Test

    Deutsches Zentrum für Luft- und Raumfahrt (DLR) | TIB AV-Portal | 2010

    Freier Zugriff

    EXOMARS Rover Chassis Analysis and Design

    Ellery, A. / Patel, N. / Richter, L. et al. | British Library Conference Proceedings | 2005


    Thermal Design of the ExoMars Rover Module

    Alary, Coralie / Lapensée, Stéphane | AIAA | 2010


    Urlaub mit Bridget. ExoMars Rover

    Hollingham, Richard | Tema Archiv | 2007