Mechanical design and testing of the MOMA flight model laser head for the EXOMARS 2020 mission

Ernst, M.; Büttner, A.; Hunnekuhl, M.; Kalms, Roland; Willemsen, L.; Weßels, P.; Kracht, Dietmar; Neumann, Jörg

doi:10.1117/12.2536118

Cited by 2 publications

(3 citation statements)

References 4 publications

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“…All data and experience gained from previous LH models led to the final FM design [22,23]. The FM was realized, extensively characterized, qualified according to a protoflight approach (with respect to environmental test loads) and finally delivered to GSFC in mid-2017.…”

Section: Model Philosophy and Historymentioning

confidence: 99%

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Space-qualified, compact and lightweight pulsed DPSS UV laser for the MOMA instrument of the ExoMars mission

et al. 2022

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A space-qualified pulsed UV laser has been developed as an irradiation source for the Mars Organic Molecule Analyser (MOMA) instrument aboard the “Rosalind Franklin” rover of the ExoMars mission (ESA/Roscosmos). MOMA will search for signatures of extinct and/or extant life on Mars. Its advanced analytical capabilities arise from the combination of a pyrolysis gas chromatograph and an ion trap-based mass spectrometer. With the addition of a compact UV laser system enabling laser desorption/ionization mass spectrometry, MOMA can detect a wide variety of both volatile and non-volatile, organic and inorganic molecules within Martian soil samples of interest. The design of the MOMA Laser Head is based on a longitudinally diode-pumped, passively Q-switched Nd:Cr:YAG oscillator generating millijoule pulses with nanosecond pulse durations at a wavelength of 1064 nm. A subsequent two-stage frequency quadrupling converts the fundamental infrared emission of the oscillator into the deep UV at 266 nm. The Laser Head emits UV pulses with a duration of about 1.5 ns and an energy tunable between 12.5 and 125 µJ for optimum adaptation to varying ionization thresholds of different molecular species. The complex but highly compact opto-mechanical design, enclosed in a hermetically sealed housing, is realized within an envelope of 200 × 56 × 45 mm3 with a total mass of less than 220 g. In this paper, we present a comprehensive summary of our development efforts towards the delivery of the LH Flight Model, which has been integrated to the MOMA instrument and finally incorporated into the ExoMars rover.

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Section: Model Philosophy and Historymentioning

confidence: 99%

“…22. A more detailed description of the environmental test campaign can be found in [23]. In compliance with the protoflight approach followed for the qualification campaign, the FM laser system was tested up to the given environmental requirements.…”

Section: Qualification Integration and Testingmentioning

confidence: 99%

Space-qualified, compact and lightweight pulsed DPSS UV laser for the MOMA instrument of the ExoMars mission

et al. 2022

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“…Only minor changes of these parameters within the requirements were found and the FM LH passed this measurement campaign. Additional details of the qualification campaign can be found in [5].…”

Section: Chania Greece 9 -12 October 2018mentioning

confidence: 99%

UV-DPSS laser flight model for the MOMA instrument of the ExoMars 2020 Mission

Weßels

Büttner

Ernst

et al. 2019

International Conference on Space Optics — ICSO 2018

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the MOMA laser team a,b a Laser Zentrum Hannover e.V., ABSTRACTThe flight model of the laser system for the Mars Organic Molecule Analyzer (MOMA) instrument within the ExoMars 2020 mission for Martian planetary surface exploration has been developed, assembled, tested, and finally integrated to the NASA Goddard Space Flight Center (GSFC) mass spectrometer. The nanosecond laser system consists of a longitudinally pumped, passively Q-switched Nd:YAG based laser oscillator with a two-stage frequency doubling to 266 nm. The laser design was implemented in robust and lightweight models of the laser head (LH) with the pump unit in a separate electronics box.In parallel to the laser head integration and testing, materials and optics qualification and acceptance tests have been performed, e.g. to determine the optical damage threshold or the susceptibility to laser induced contamination processes.Before delivery to the NASA GSFC for integration to the mass spectrometer (MS) flight model (FM), the laser system has been qualified in an environmental test campaign including vibration, shock and thermal-vacuum testing. After delivery to GSFC and integration to the FM MS, the system has been successfully re-tested on the instrument level.

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Mechanical design and testing of the MOMA flight model laser head for the EXOMARS 2020 mission

Cited by 2 publications

References 4 publications

Space-qualified, compact and lightweight pulsed DPSS UV laser for the MOMA instrument of the ExoMars mission

Space-qualified, compact and lightweight pulsed DPSS UV laser for the MOMA instrument of the ExoMars mission

UV-DPSS laser flight model for the MOMA instrument of the ExoMars 2020 Mission

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