Kempf Sascha, Tucker Scott, Altobelli Nicolas, Briois Christelle, Cable Morgan L, Grün Eberhard, Gudipati Murthy S, Henderson Bryana L, Hsu Hsian-Wen, Hand Kevin, Horanyi Mihaly, Postberg Frank, Schmidt Jürgen, Srama Ralf, Sternovsky Zoltan, Tobie Gabriel, Zolotov Mikhail Y, Belting Chris, Bortfeldt Susan, Bouwman Jordy, Brennan Nat, Bryant Karen, Cassidy Timothy, Crotser David, Curtin Alexandra, DeVito Elz, Ebuen Donrich, Faber Nat, Fisher Melanie, Fontanese John, Fowle Maxwell, Frank Wendy, Gurst Scott, Haselschwardt Sally, Hoxie Vaughn, Hubbell Karl, James David, Kien Mark, Knappmiller Scott, Kohnert Rick, Lampe Alexander, Lankton Mark, Lev-Tov Sean, McGinn Crystal, Miller Marc, Newcomb Gregory, Oberg Samuel, O'Brien Leela, Pilewskie Kathrine, Polson Shawn, Scarffe-Barrett Victoria, Summers David, Wade Stacy, Ware Alexandria, Yehle Alan, Wuerthner Corinne, Garcia Arteaga Adrian, Oaida Bogdan, Eberl Chad, Fitton Polly, Goode William, Levin Zuni, Lowry Gwyneth, Stanley Jared, Tracy Anthony, Ulibarri Zach, Williams Ethan, Yoke Camille, Southworth Ben S, Hillier Jonathan K, Khawaja Nozair, Klenner Fabian, Napoleoni Maryse, Simolka Jonas, Sioeng Jason
LASP, University of Colorado, 1234 Innovation Drive, Boulder, CO 80303 USA.
ESAC, Camino bajo del Castillo, Villanueva de la Cañada, Madrid, Spain.
Space Sci Rev. 2025;221(1):10. doi: 10.1007/s11214-025-01134-0. Epub 2025 Jan 29.
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 , radiation-hard design, and rather large sensitive area of 220 cm matches well the challenging demands of the Clipper mission.
表面尘埃分析仪（SUDA）是木卫二快船任务搭载的一台质谱仪，用于研究木星的伽利略卫星木卫二的表面成分。像伽利略卫星这样没有大气层的行星卫星被包裹在一个弹道尘埃外逸层中，该外逸层由快速微流星体撞击月球表面产生的微小样本组成。SUDA将在木卫二近距离飞越期间测量此类表面喷出物的成分，以获取关键化学特征，从而揭示该卫星的成分，如有机分子和盐类、历史以及地质演化。由于其弹道轨道，检测到的喷出物可以追溯到表面，空间分辨率大致等于航天器的瞬时高度。SUDA是一台飞行时间（TOF）反射式撞击质谱仪，针对高分辨率进行了优化，其分辨率仅微弱依赖于撞击位置。该仪器将测量撞击颗粒的质量、速度、电荷、元素、分子和同位素组成。该仪器体积小、采用抗辐射设计且敏感面积相当大，达220平方厘米，非常符合快船任务的艰巨要求。
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