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<p>The Surface Dust Analyser (SUDA) is a mass spectrometer onboard the Europa Clipper mission for investigating the surface composition of the Galilean moon Europa. Atmosphereless planetary moons such as the Galilean satellites are wrapped into a ballistic dust exosphere populated by tiny samples from the moon’s surface produced by impacts of fast micrometeoroids. SUDA will measure the composition of such surface ejecta during close flybys of Europa to obtain key chemical signatures for revealing the satellite’s composition such as organic molecules and salts, history, and geological evolution. Because of their ballistic orbits, detected ejecta can be traced back to the surface with a spatial resolution roughly equal to the instantaneous altitude of the spacecraft. SUDA is a Time-Of-Flight (TOF), reflectron-type impact mass spectrometer, optimized for a high mass resolution which only weakly depends on the impact location. The instrument will measure the mass, speed, charge, elemental, molecular, and isotopic composition of impacting grains. The instrument’s small size of <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11214_2025_1134_Article_IEq1.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="179" /> </InlineMediaObject> <EquationSource Format="MATHML"><math> <mn>268</mn> <mspace width="0.3em" /> <mi mathvariant="normal">mm</mi> <mo>×</mo> <mn>250</mn> <mspace width="0.3em" /> <mi mathvariant="normal">mm</mi> <mo>×</mo> <mn>171</mn> </math></EquationSource> <EquationSource Format="TEX">$268 ~\mathrm {mm} \times 250 ~\mathrm {mm} \times 171$</EquationSource> </InlineEquation><InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11214_2025_1134_Article_IEq2.gif" Format="GIF" Height="10" Rendition="HTML" Resolution="72" Type="Linedraw" Width="29" /> </InlineMediaObject> <EquationSource Format="MATHML"><math> <mspace width="0.3em" /> <mi mathvariant="normal">mm</mi> </math></EquationSource> <EquationSource Format="TEX">$~\mathrm {mm}$</EquationSource> </InlineEquation>, radiation-hard design, and rather large sensitive area of 220&#xa0;cm<sup>2</sup> matches well the challenging demands of the Clipper mission.</p>

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SUDA: A SUrface Dust Analyser for Compositional Mapping of the Galilean Moon Europa

  • 期刊论文

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  • 发表日期：

    2025年1月29日

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  • Sascha Kempf,
  • Scott Tucker,
  • Nicolas Altobelli,
  • Christelle Briois,
  • Morgan L. Cable,
  • Eberhard Grün,
  • Murthy S. Gudipati,
  • Bryana L. Henderson,
  • Hsian-Wen Hsu,
  • Kevin Hand,
  • Mihaly Horanyi,
  • Frank Postberg,
  • Jürgen Schmidt,
  • Ralf Srama,
  • Zoltan Sternovsky,
  • Gabriel Tobie,
  • Mikhail Y. Zolotov,
  • Chris Belting,
  • Susan Bortfeldt,
  • Jordy Bouwman,
  • Nat Brennan,
  • Karen Bryant,
  • Timothy Cassidy,
  • David Crotser,
  • Alexandra Curtin,
  • Elz DeVito,
  • Donrich Ebuen,
  • Nat Faber,
  • Melanie Fisher,
  • John Fontanese,
  • Maxwell Fowle,
  • Wendy Frank,
  • Scott Gurst,
  • Sally Haselschwardt,
  • Vaughn Hoxie,
  • Karl Hubbell,
  • David James,
  • Mark Kien,
  • Scott Knappmiller,
  • Rick Kohnert,
  • Alexander Lampe,
  • Mark Lankton,
  • Sean Lev-Tov,
  • Crystal McGinn,
  • Marc Miller,
  • Gregory Newcomb,
  • Samuel Oberg,
  • Leela O’Brien,
  • Kathrine Pilewskie,
  • Shawn Polson,
  • Victoria Scarffe-Barrett,
  • David Summers,
  • Stacy Wade,
  • Alexandria Ware,
  • Alan Yehle,
  • Corinne Wuerthner,
  • Adrian Garcia Arteaga,
  • Bogdan Oaida,
  • Chad Eberl,
  • Polly Fitton,
  • William Goode,
  • Zuni Levin,
  • Gwyneth Lowry,
  • Jared Stanley,
  • Anthony Tracy,
  • Zach Ulibarri,
  • Ethan Williams,
  • Camille Yoke,
  • Ben S. Southworth,
  • Jonathan K. Hillier,
  • Nozair Khawaja,
  • Fabian Klenner,
  • Maryse Napoleoni,
  • Jonas Simolka,
  • Jason Sioeng

摘要

The Surface Dust Analyser (SUDA) is a mass spectrometer onboard the Europa Clipper mission for investigating the surface composition of the Galilean moon Europa. Atmosphereless planetary moons such as the Galilean satellites are wrapped into a ballistic dust exosphere populated by tiny samples from the moon’s surface produced by impacts of fast micrometeoroids. SUDA will measure the composition of such surface ejecta during close flybys of Europa to obtain key chemical signatures for revealing the satellite’s composition such as organic molecules and salts, history, and geological evolution. Because of their ballistic orbits, detected ejecta can be traced back to the surface with a spatial resolution roughly equal to the instantaneous altitude of the spacecraft. SUDA is a Time-Of-Flight (TOF), reflectron-type impact mass spectrometer, optimized for a high mass resolution which only weakly depends on the impact location. The instrument will measure the mass, speed, charge, elemental, molecular, and isotopic composition of impacting grains. The instrument’s small size of 268 mm × 250 mm × 171 $268 ~\mathrm {mm} \times 250 ~\mathrm {mm} \times 171$ mm $~\mathrm {mm}$ , radiation-hard design, and rather large sensitive area of 220 cm2 matches well the challenging demands of the Clipper mission.