Andromede is a new instrument for mass spectrometry analysis of nanodomains and nano-objects present on a surface. The molecular sample information (mass and structure) is obtained from time-of-flight spectra of secondary ions emitted under the impact of nanoparticles (NPs), as A u n q + with n/q up to 200 accelerated by a 4 MV single stage electrostatic Pelletron® accelerator. Such projectiles, providing huge emission rates per impact, permit the topographic analysis of complex samples. The energy deposition of these massive gold NPs induces surprisingly large holes of about 100 nm diameter in very thin graphene foils and average sputtered volume per impact of about 106 nm3 in a thick polymer material. The use of such massive clusters associated with multianode detectors, allowing the simultaneous detection of several ions of a given mass, permits correlation studies between the emitted ions within a single impact, shedding additional light on the chemical composition and structure of the analysed sample as illustrated here for various samples from metallic surfaces to biologic molecules deposits.

中文翻译：

---

使用仙女座设施提供的 MeV 金纳米粒子束提高溅射和二次离子产率

Andromede 是一种用于对表面上的纳米域和纳米物体进行质谱分析的新仪器。分子样品信息（质量和结构）是从在纳米粒子 (NPs) 撞击下发射的二次离子的飞行时间光谱获得的，作为 A unq +，n/q 高达 200，由 4 MV 单级静电加速Pelletron® 加速器。这种射弹每次撞击提供巨大的发射率，允许对复杂样品进行地形分析。这些巨大的金 NP 的能量沉积在非常薄的石墨烯箔中产生了令人惊讶的约 100 nm 直径的大孔，并且在厚聚合物材料中每次撞击的平均溅射体积约为 106 nm3。使用与多阳极检测器相关的这种大质量簇，允许同时检测给定质量的多个离子，