论文标题
飞行质谱时间，直接提取铀等离子体
Time of Flight Mass Spectrometry with Direct Extraction of a Uranium Plasma
论文作者
论文摘要
我们证明了修改飞行质谱仪的Wiley-McClaren时间，以允许从激光诱导的血浆中直接提取离子。与许多其他利用质谱法研究激光诱导的等离子体的方法不同，在加速前不需要碰撞冷却或进一步的等离子体电离，从而可以直接获得血浆离子组成的测量。此外，我们显示了使用gadolinium的激光消融为例，我们能够直接获得血浆的翻译能量分布，并推断有关等离子体羽流不同区域内离子相对组成的信息。然后，将该方法应用于铀样品的激光消融，作为在与核火球有关的核法医应用相关条件下探测化学的一步。
We demonstrate a Wiley-McClaren Time of Flight Mass Spectrometer modified to allow direct extraction of ions from a laser-induced plasma. Unlike many other methods that utilize mass spectrometry to investigate laser-induced plasmas, no collisional cooling or further ionization of the plasma is required prior to acceleration, allowing measurements of the plasma ion composition to be obtained directly. Furthermore, we show using the laser ablation of gadolinium as an example that we are able to obtain the translational energy distribution of the plasma directly and infer information about the relative composition of ions within different regions of the plasma plume. The approach is then applied to laser ablation of a uranium sample as a step toward probing the chemistry under conditions relevant to a nuclear fireball for nuclear forensics applications.
