The formation of BeD⁺ in collisions of deuterium molecular ions with a beryllium surface at hyperthermal energies is investigated, using a purpose-built tandem mass spectrometer setup, “SurfTOF”. In the manifold of products, hydrogen-containing molecules are of special interest in fusion devices. Our experiments show, that they can be formed in nearly all conditions comparable to plasma and wall temperature, with two mechanisms involved: First, BeD⁺ is formed directly in a reaction of the D₂⁺ projectiles with the Be surface, which is the main aspect of this work. There was no evidence found, that this particular mechanism relies on D implanted in the bulk Be. BeD₂⁺ was not detected. The second reaction pathway produces BeH⁺. It is efficiently formed when H₂O molecules are adsorbed on the surface, much less abundant for hydrocarbon adsorbates. The yield of Be⁺, BeH⁺ and BeD⁺ products, is measured as a function of several parameters: Scanning the impact energy from 20 to 426 eV reveals that the molecular BeD⁺ is preferably produced at low energies. At 20 eV, its abundance is three times higher than that of pure Be⁺. When the surface temperature is raised from 298 to 673 K, sputtering yields increase two orders of magnitude for both, Be⁺ and BeD⁺.

使用专用的串联质谱仪“ SurfTOF”，研究了氘分子离子与铍表面在高温下的碰撞中BeD ⁺的形成。在多种产品中，含氢分子在聚变设备中特别受关注。我们的实验表明，它们几乎可以在与等离子体和壁温相当的所有条件下形成，其涉及两个机理：首先，BeD ⁺是直接在D ₂ ⁺弹丸与Be表面的反应中形成的，这是主要的原因。这项工作的方面。没有证据表明，这种特殊的机制依赖于植入在Be中的D。BeD ₂ ⁺未检测到。第二反应途径产生BeH ⁺。当H ₂ O分子吸附在表面上时有效形成，而碳氢化合物的吸附量要少得多。测量Be ⁺，BeH ⁺和BeD ⁺产物的收率是几个参数的函数：从20 eV到426 eV的冲击能扫描表明，分子BeD ⁺优选在低能量下产生。在20 eV时，其丰度是纯Be ^+的丰度的三倍。当表面温度从298 K升高到673 K时，Be ⁺和BeD ^+的溅射产率都增加了两个数量级。