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Erlangen 2022 – scientific programme

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MO: Fachverband Molekülphysik

MO 8: Poster 1

MO 8.18: Poster

Tuesday, March 15, 2022, 16:30–18:30, P

Laboratory simulations of solar wind ion irradiation on the surface of MercuryCaixia Bu1, Benjamin C. Bostick2, Steve N. Chillrud2, Deborah L. Domingue3, Denton S. Ebel4, George E. Harlow4, Rosemary M. Killen5, •Daniel Schury1, Kyle P. Bowen1, Pierre-Michel Hillenbrand1, Xavier Urbain6, Ruitian Zhang1, Dmitry Ivanov1, and Daniel W. Savin11Columbia Astrophysics Laboratory, Columbia University, New York — 2Lamont-Doherty Earth Observatory, Columbia University, Palisades — 3Planetary Science Institute, Tucson — 4American Museum of Natural History, New York — 5NASA-Goddard Space Flight Center, Greenbelt — 6Université Catholique de Louvain, Louvain-la- Neuve

Mercury possesses a Na exosphere that is thought to be in part formed by solar wind ion sputtering of the planet's regolith surface. However, reliable sputtering data are lacking to confirm this hypothesis. Observations of the planet from satellites such as MESSENGER provide spectral and photometric data of the surface, which is affected by solar wind ion irradiation.

We have developed a novel apparatus to perform solar wind-like ion irradiation of loose regolith-like powders and to measure angular sputter yields and spectral changes. Spectra spanning 350-2500 nm will be collected in-vacuo and in-situ as a function of ion fluence. We will present the experimental setup and provide first results.

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