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[Si₂O₆] 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.

水星表面连续暴露于撞击的太阳风离子。为了增进对空间风化和大气层形成的理解，有必要对离子-表面相互作用进行详细研究。富含镁和铁的辉石（Ca，Mg，Fe）₂ [Si ₂ O ₆ ]样品用作汞表面的类似物，并用He ⁺辐照太阳风能为4 keV时产生的离子。在那里观察到几种注入和溅射方式。植入的He的总估计质量与在随后的热脱附光谱测量过程中由于He放气引起的质量下降相吻合。与已建立的建模工作和SDTrimSP模拟的比较表明，必须假定He饱和浓度为10 at。％。通过加热到530 K，可以观察到He的完全去除。在水星表面，预计温度在100 K和700 K之间。因此，该温度将影响He植入和释放到水星系外层中。