Sputtering of ice by low-energy ions

Famá, M.; Shi, J.; Baragiola, R. A.

doi:10.1016/j.susc.2007.10.002

Cited by 100 publications

(188 citation statements)

References 27 publications

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“…, implies an initial sputtering yield Y = σ1 ~ 3 H2O/He, of the same order as the measured sputtering yield for ice (Famá et al 2008). The second cross-section, σ2 = 1.2(±0.4) x 10 -16 cm 2 , is interpreted as desorption of a tightly bound layer that remains adsorbed on the soil after the ice is removed.…”

Section: Sputter Removal Of H2o Deposited On Lunar Soilsupporting

confidence: 61%

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The Role of Solar Wind in the Formation of Hydroxyl on Airless Silicate Bodies in Space

Schaible

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Dedicated to all individuals who work for the betterment of themselves, their world, and their connection with the oneness that binds us all. To all my family and friends that have seen my needs and helped me to the position I am in, thank you. AbstractStudies of the interaction of solar radiation with the surfaces of moons, asteroids and comets can provide fundamental information about the early history of our solar system and help elucidate the ways in which such systems evolve. Airless bodies in space such as the Moon, asteroids and interplanetary dust particles are subject to bombardment from energetic solar wind electrons and ions, ultraviolet photons, micrometeorites and cosmic rays. This process is known as space weathering and the cumulative effect of the radiation modifies the chemical and physical nature of the ices and minerals that make up such surfaces. The work presented here investigates the interaction of solar wind hydrogen and helium with analog minerals and lunar soil using infrared spectroscopy (FTIR), mass spectrometry (SIMS), and optical photometry. Experiments were performed under Ultra High Vacuum (UHV) pressures and over a temperature range of 15 K to 400 K to simulate lunar surface conditions, and radiation was performed using a mass analyzed ion accelerator that allowed samples to be irradiated with specific ions at energies in the range of the solar wind.

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Section: Sputter Removal Of H2o Deposited On Lunar Soilsupporting

confidence: 61%

“…Famá et al, 2008], the lunar regolith is predominantly a fine powder with a median particle size of 40 to 130 μm [Lunar sourcebook]. Shadowing effects due to irregular surfaces and multiple grains have an estimated effect of decreasing desorption yield by a factor of ~3 [Cassidy and Johnson, 2005].…”

Section: Astrophysical Motivationmentioning

confidence: 99%

The Role of Solar Wind in the Formation of Hydroxyl on Airless Silicate Bodies in Space

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“…The composition and distribution of the exogenic dark material dispersed on Dione's trailing hemisphere is discussed in Clark et al (2008) and Stephan et al (2010), while a detailed study of Rhea's properties is done by Stephan et al (2012). Although so far several laboratory studies on the efficiency of the neutral particle release from ice bombarded by energetic particles have been done (see Famà et al 2008 and references therein) the actual conditions in space can be very different from those in the laboratory. In this frame, measurements of the released neutrals above Rhea and Dione and their correlation with the surface composition data obtained by other instruments become very important: they can provide information on the way contaminants affect the exosphere composition and spatial distribution, determining the space weather conditions around the moons.…”

Section: à3mentioning

confidence: 99%

Planetary space weather: scientific aspects and future perspectives

Plainaki

Lilensten

Radioti

et al. 2016

J. Space Weather Space Clim.

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In this paper, we review the scientific aspects of planetary space weather at different regions of our Solar System, performing a comparative planetology analysis that includes a direct reference to the circum-terrestrial case. Through an interdisciplinary analysis of existing results based both on observational data and theoretical models, we review the nature of the interactions between the environment of a Solar System body other than the Earth and the impinging plasma/radiation, and we offer some considerations related to the planning of future space observations. We highlight the importance of such comparative studies for data interpretations in the context of future space missions (e.g. ESA JUICE; ESA/JAXA BEPI COLOMBO). Moreover, we discuss how the study of planetary space weather can provide feedback for better understanding the traditional circumterrestrial space weather. Finally, a strategy for future global investigations related to this thematic is proposed.

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“…In the absence of an atmosphere and when it is not hindered by an intrinsic local magnetic field, this plasma reaches the surface and interacts directly with surface materials. The sputtering of surface materials by incident ions results in a flux of energetic neutral atoms (ENA) leaving the surface ( Shi et al, 1995;Ip et al, 1997;Johnson, 1998;Cooper et al, 2001;Baragiola et al, 2003;Famá et al, 2008 ) that contribute to the formation of extended exospheres ( Wurz et al, 2010 ). The energy distribution of these ENAs is dominated by energies below 10s of eV ( Sigmund, 1969;Betz and Wien, 1994 ) and, in the context of planetary science, has a cutoff at approximately 100 eV ( Wurz and Lammer, 2003;Wurz et al, 2007 ).…”

Section: Introductionmentioning

confidence: 99%

“…Experimental data for the emission of ENAs from ices as found, e.g., on Ganymede's surface ( Showman and Malhotra, 1999 ) when it is bombarded with ions in the keV to 10s of keV energy range, usually focus on the total sputter yield; thus, little data exist regarding the energy spectra of the emitted ENAs ( Shi et al, 1995;Ip et al, 1997;Johnson, 1998;Baragiola et al, 2003;Famá et al, 2008 ). This is due to the difficulty in measuring ENAs in the energy range from 10s of eV up to a few keV.…”

Section: Introductionmentioning

confidence: 99%

Emission of energetic neutral atoms from water ice under Ganymede surface-like conditions

Wieser

Futaana

Barabash

et al. 2016

Icarus

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a b s t r a c tThe co-rotating plasma around Jupiter precipitates on the surfaces of the jovian moons, where it is not hindered by a local magnetic field. Precipitating ions lead to the emission of energetic neutral atoms, which are produced via backscattering and sputtering processes, from the surface. The European Space Agency's JUICE mission to Jupiter carries as part of the Particle Environment Package experiment an imaging energetic neutral atom spectrometer called the jovian Neutrals Analyzer (JNA). When it is in orbit around Ganymede, JNA will measure the energetic neutral atom flux emitted from the surface of Ganymede in the energy range from 10 eV to 3300 eV. The surface of Ganymede consists of a large fraction of water ice. To characterize the expected energetic neutral atom fluxes from water ice due to precipitating jovian plasma, we impacted protons and singly charged oxygen ions with energies up to 33 keV on a salty water ice target kept at Ganymede surface conditions. Emitted energetic atoms were measured energy-and mass-resolved using the JNA prototype instrument. The data show high yields for energetic neutral atoms per incident ion in the JNA energy range. For incident protons, energetic neutral atom yields between 0.28 at 1 keV and ∼40 at 33 keV were observed. For incident singly charged oxygen ions, the observed energetic neutral atom yield ranged from 0.8 for at 3 keV to ∼170 at 23 keV.

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Sputtering of ice by low-energy ions

Cited by 100 publications

References 27 publications

The Role of Solar Wind in the Formation of Hydroxyl on Airless Silicate Bodies in Space

The Role of Solar Wind in the Formation of Hydroxyl on Airless Silicate Bodies in Space

Planetary space weather: scientific aspects and future perspectives

Emission of energetic neutral atoms from water ice under Ganymede surface-like conditions

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