Abstract Surface ablation of tungsten, known as a plasma-facing material in fusion devices, was investigated mass-spectrometrically in ion beam-type experiments by exposing a tungsten surface in the presence of H2/D2 to fast atomic and molecular projectile ions with high electron-recombination energies (Ar+, He+ and N2+). The sputtered product ions were monitored by high resolution mass spectrometry, in the case of Ar+, at various beam energies, surface temperatures and partial pressures of D2 at beam and product-ion angles of 45°. Bare monatomic and diatomic tungsten ions were seen to be sputtered, more so at elevated ion impact energies and increasing surface temperatures. The relative yield of deuterated WD+ ions was enhanced at higher impact energies and increased partial pressures of D2, but diminished with increasing tungsten temperature. Overall, the observations under our experimental conditions suggest the occurrence of Physical Sputtering (PS) of bare tungsten ions, W+ and W2+, as well as Chemically Assisted Physical Sputtering (CAPS) of WD+ with concomitant dissociation of D2.

中文翻译：

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在 D2 存在下与 Ar+、He+ 和 N2+ 阳离子弹丸碰撞时钨表面的烧蚀

摘要 钨的表面烧蚀被称为聚变装置中面向等离子体的材料，在离子束型实验中通过将钨表面在 H2/D2 存在下暴露于具有高电子的快速原子和分子射弹离子进行质谱研究。 -复合能（Ar+、He+ 和 N2+）。溅射的产物离子通过高分辨率质谱法监测，在 Ar+ 的情况下，在不同的束能量、表面温度和 D2 分压下，束和产物离子角度为 45°。可以看到裸单原子和双原子钨离子被溅射，在离子冲击能量升高和表面温度升高时更是如此。氘代 WD+ 离子的相对产率在更高的冲击能量和 D2 分压增加时增加，但随着钨温度的增加而减少。