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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Arevalo, R. Brinckerhoff, W. van Amerom, F. Danell, R. Pinnick, V. Xiang Li Getty, S. Hovmand, L. Grubisic, A. Mahaffy, P. Goesmann, F. Steininger, H. |
| Copyright Year | 2015 |
| Description | Author affiliation: Danell Consulting, Inc., Winterville, NC, USA (Danell, R.) || Max Planck Inst. for Solar Syst. Res., Gottingen, Germany (Goesmann, F.; Steininger, H.) || Center for Res. & Exploration in Space Sci. & Technol., Univ. of Maryland Baltimore County, Baltimore, MD, USA (Pinnick, V.; Xiang Li) || CRESST, Univ. of Maryland, College Park, MD, USA (Grubisic, A.) || Linear Labs. LLC, Washington, DC, USA (Hovmand, L.) || Mini-Mass Consulting, Inc., Hyattsville, MD, USA (van Amerom, F.) || NASA Goddard Space Flight Center (GSFC), Greenbelt, MD, USA (Arevalo, R.; Brinckerhoff, W.; Getty, S.; Mahaffy, P.) |
| Abstract | 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. |
| Starting Page | 1 |
| Ending Page | 11 |
| File Size | 2946812 |
| Page Count | 11 |
| File Format | |
| ISBN | 9781479953790 |
| e-ISBN | 9781479953806 |
| DOI | 10.1109/AERO.2015.7119073 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2015-03-07 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Biographies Spectroscopy Ovens Apertures Valves Payloads Chemical lasers |
| Content Type | Text |
| Resource Type | Article |
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