The Planetary Science Journal (Jan 2024)

The Peregrine Ion Trap Mass Spectrometer (PITMS) Investigation Development and Preflight Planning

  • Barbara A. Cohen,
  • Simeon J. Barber,
  • Phillip A. Driggers,
  • David Heather,
  • Christopher Howe,
  • Peter Landsberg,
  • Thomas Morse,
  • Roland Trautner,
  • Feargus Abernethy,
  • Emma-May Butroid,
  • Natalie M. Curran,
  • Christophe Delepaut,
  • Ellis Elliott,
  • Javier Fernandez Salgado,
  • Joseph A. Generie,
  • Philipp Hager,
  • Sophie Hall,
  • Fiona Hillier,
  • Max Hodgkins,
  • Sara Iacobellis,
  • Alicja Kasjanowicz,
  • Ewout Koekkoek,
  • Mark Leese,
  • Karin Lundmark,
  • Jeremy Mayers,
  • Andrew Morse,
  • James Mortimer,
  • Hume L. Peabody,
  • Patrick Reast,
  • Simon Sheridan,
  • Richard Stamper,
  • Peter J. Steigner,
  • Harald Stier,
  • Lauren Summers,
  • Orenthal J. Tucker,
  • Martin Whalley,
  • Simon Woodward

DOI
https://doi.org/10.3847/PSJ/ad6e7b
Journal volume & issue
Vol. 5, no. 9
p. 212

Abstract

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The Peregrine Ion Trap Mass Spectrometer (PITMS) is a mass spectrometer instrument that operated during the Astrobotic Peregrine Mission-1 as part of the NASA Commercial Lunar Payload Services initiative. This paper describes the instrument and investigation design, development, and planning conducted by the PITMS team, consisting of a successful partnership between NASA Goddard Space Flight Center (GSFC), The Open University, NASA, and ESA. PITMS was designed to measure the abundance and temporal variability of volatile species in the near-surface lunar exosphere from a landed platform on the lunar surface. The PITMS instrument consisted of a European Space Agency–provided Exospheric Mass Spectrometer (including sensor, electronics, controller, and power supply boards) and a GSFC wrapper that provided structural elements, thermal control, and a deployable dust cover. PITMS was designed to operate as a passive sampler, where ambient gases would enter PITMS through an aperture, diffuse around the mass analyzer cavity, become ionized by electron impact and trapped in an RF field, and then sequentially be released to a detector to build a mass spectrum. PITMS was capable of measuring species with a mass-to-charge ratio ( m / z ) from 10 to 150 Da, with a mass resolution of approximately 0.5 amu. The PITMS science investigation was planned to be operated by GSFC with an international team of scientists. Though the mission did not achieve its lunar landing, information about the PITMS instrument and planning is provided to be able to understand and effectively use data that will be forthcoming from the investigation.

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