论文标题
近气压速度图成像
Near-Ambient Pressure Velocity Map Imaging
论文作者
论文摘要
我们提出了一种新的速度图成像仪器，用于在近气压（NAP-VMI）环境中研究分子束表面散射。该仪器提供了研究化学反应动力学和动力学的可能性，在这种动力学和动力学中，需要更高的压力或不可避免的压力。 NAP-VMI条件是由两组离子光学元件创建的，该离子光学器件可以通过孔指导离子并绘制其速度。孔径将高压电离区域分开，并保持检测器区域的必要真空。 NAP-VMI的性能得到了N $ _2 $ o光解离的结果和n $ _2 $从PD（110）表面散射的结果，这些表面是在真空和接近气压下（$ 1 \ times10^{ - 3} $ MBAR）进行比较的。 NAP-VMI具有应用于更广泛的实验，包括光电子光谱和液体微型散射的范围。
We present a new velocity map imaging instrument for studying molecular beam surface scattering in a near-ambient pressure (NAP-VMI) environment. The instrument offers the possibility to study chemical reaction dynamics and kinetics where higher pressures are either desired or unavoidable. NAP-VMI conditions are created by two sets of ion optics that guide ions through an aperture and map their velocities. The aperture separates the high pressure ionization region and maintains the necessary vacuum in the detector region. The performance of the NAP-VMI is demonstrated with results from N$_2$O photodissociation and N$_2$ scattering from Pd(110) surface, which are compared under vacuum and at near-ambient pressure ($ 1\times10^{-3} $ mbar). NAP-VMI has the potential to be a applied to, and useful for, a broader range of experiments including photoelectron spectroscopy and scattering with liquid microjets.
