Erosion of iron-tungsten model films by deuterium ion irradiation: a benchmark for TRI3DYN

Stadlmayr, R.; Szabo, Paul Stefan; Mayer, Daniel; Cupak, C.; Möller, W.; Aumayr, F.

doi:10.1088/1402-4896/ab438f

Cited by 9 publications

(17 citation statements)

References 14 publications

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“…It can also be seen as an analogue to the general pyroxene contributions to bodies such as the Moon or Mercury, where pyroxene minerals (together with plagioclase) make up a significant amount of the respective surfaces (Cremonese et al 2005;Yamashita et al 2012). First results from these experiments can be found in a previous publication (Szabo et al 2018). While kinetic sputtering for H + and Ar + was found to be in good agreement with SDTrimSP simulations, considerable potential sputtering contributions were observed for higher Ar charge states.…”

Section: Introductionsupporting

confidence: 65%

“…He 2+ is much more prominent in the solar wind than heavier ions and will probably play the most important role for potential sputtering (Wurz 2005). Previously we have used data from Ar q+ measurements to estimate the potential sputtering for He 2+ ions to be about five times higher than the kinetic sputtering yield at the He solar wind energy of 4 keV (see Figure 1) (Szabo, et al 2018). This would make He 2+ the most significant source of solar wind sputtering.…”

Section: Introductionmentioning

confidence: 99%

“…For example, N implantation in Be (Oberkofler et al 2015) or chemical effects of C erosion as a result of H irradiation (Rai, Mutzke, & Schneider 2010) have successfully been modeled. Strong focus has recently been put on expanding BCA programs to include effects relevant for sputtering of rough surfaces or nanostructuring (see for example (Stadlmayr et al 2018;Stadlmayr et al 2019) or (Arredondo et al 2019)).…”

Section: Introductionmentioning

confidence: 99%

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Dynamic Potential Sputtering of Lunar Analog Material by Solar Wind Ions

Szabo

Biber

Jäggi

et al. 2020

ApJ

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Pyroxenes ((Ca, Mg, Fe, Mn) 2 Si 2 O 6 ) belong to the most abundant rockforming minerals that make up the surface of rocky planets and moons. Therefore sputtering of pyroxenes by solar wind ions has to be considered as a very important process for modifying the surface of planetary bodies. In order to quantify this effect, sputtering of wollastonite (CaSiO 3 ) by He 2+ ions, which are seen as a very prominent contribution to solar wind potential sputtering, was investigated. Thin films of CaSiO 3 deposited on a quartz crystal microbalance were irradiated allowing precise in-situ real time sputtering yield measurements. Experimental results were compared with simulations with the code SDTrimSP, which were improved by adapting the used surface binding energy.On a freshly prepared surface He 2+ ions show a significant increase in sputtering compared to equally fast He + ions. The yield, however, decreases exponentially with fluence, reaching steady state at considerably lower values after sputtering of the first few monolayers.Experiments using Ar 8+ ions show a similar behavior and are qualitatively explained by a preferential depletion of surface oxygen due to potential sputtering. A corresponding quantitative model is applied, which is able to reproduce the observed potential sputtering behavior of both He and Ar very well. The results of these calculations support the assumption that mainly O atoms are affected by potential sputtering. We conclude that the defect-mediated model of potential sputtering is also well-suited for CaSiO 3 .

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Section: Introductionsupporting

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dynamic Potential Sputtering of Lunar Analog Material by Solar Wind Ions

Szabo

Biber

Jäggi

et al. 2020

ApJ

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“…This ion source is mostly suited for irradiations with singly charged ions, which is sufficient for the present study. Here, mass over charge separation was realized with a Wien velocity filter attached to the ion source [21].…”

Section: Ion Beam Setupmentioning

confidence: 99%

Solar wind Helium ion interaction with Mg and Fe rich pyroxene as Mercury surface analogue

Biber

Szabo

Jäggi

et al. 2020

Nuclear Instruments and Methods in Physics Research Section B:

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The surface of Mercury is continuously exposed to impinging solar wind ions. To improve the understanding of space weathering and exosphere formation, a detailed investigation of the ion-surface interaction is necessary. Magnesium and iron rich pyroxene (Ca,Mg,Fe) 2 [Si 2 O 6 ] samples were used as analogues for Mercury's surface and irradiated with He + ions at solar wind energies of 4 keV. Several regimes of implantation and sputtering were observed there. The total estimated mass of implanted He coincides with the mass decrease due to He outgassing during subsequent Thermal Desorption Spectroscopy measurements. Comparison to established modeling efforts and SDTrimSP simulations show that a He saturation concentration of 10 at.% has to be assumed. A complete removal of He is observed by heating to 530 K. On the surface of Mercury, temperatures between about 100 K and 700 K are expected. This temperature will therefore influence the implantation and release of He into Mercury's exosphere.

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“…Besides that, knowledge of ion-solid interaction is fundamental for many analysis techniques 6,7 and materials studies, e.g. in plasma-wall interaction 8,9 and astrophysical science 10,11 .…”

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confidence: 99%

Peeling graphite layer by layer reveals the charge exchange dynamics of ions inside a solid

et al. 2021

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Over seventy years ago, Niels Bohr described how the charge state of an atomic ion moving through a solid changes dynamically as a result of electron capture and loss processes, eventually resulting in an equilibrium charge state. Although obvious, this process has so far eluded direct experimental observation. By peeling a solid, such as graphite, layer by layer, and studying the transmission of highly charged ions through single-, bi- and trilayer graphene, we can now observe dynamical changes in ion charge states with monolayer precision. In addition we present a first-principles approach based on the virtual photon model for interparticle energy transfer to corroborate our findings. Our model that uses a Gaussian shaped dynamic polarisability rather than a spatial delta function is a major step in providing a self-consistent description for interparticle de-excitation processes at the limit of small separations.

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Erosion of iron-tungsten model films by deuterium ion irradiation: a benchmark for TRI3DYN

Cited by 9 publications

References 14 publications

Dynamic Potential Sputtering of Lunar Analog Material by Solar Wind Ions

Dynamic Potential Sputtering of Lunar Analog Material by Solar Wind Ions

Solar wind Helium ion interaction with Mg and Fe rich pyroxene as Mercury surface analogue

Peeling graphite layer by layer reveals the charge exchange dynamics of ions inside a solid

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