Simulation of high speed capture of interstellar grains

该项目的总体目标是完成星尘星际初步检查小组内部的合作，将撞击特征转化为粒子的原始物理和化学性质，并利用目前可用的校准材料和碰撞电离质谱仪的实验，为土星系统中由宇宙尘埃分析仪测量的星际尘埃颗粒的化学分析打开一个新的窗口。这项建议包括四项主要任务：)制备和表征用于Van-de-Graaff加速器的宇宙尘埃模拟样品，b)超高速撞击星尘箔类似物和撞击电离靶板，c)研究撞击坑形态，撞击残留物与同步质谱分析，以及d)使用大面积质量分析仪(LAMA)和CDA飞行仪器进行数据分析。碰撞现象将在7公里/S以上的速度下进行研究，在星际尘埃收集运动中发现的速度与土星系统内预测的较高速度(&GT；19公里/S)之间产生重叠。ISPE的工作将与作为ISPE协作成员的其他SPP小组(F.Brenker、Frankfort、P.Hoppe、J.Leitner、MPI-C Mainz)合作进行。该项目处于第三阶段，期限为两年。

The overall goal of this project is to complete the collaboration within the Stardust Interstellar Preliminary Examination team (ISPE) in translating impact features into the particles original physical and chemical properties, and to use the currently available calibration material and experiments with impact ionisation mass spectrometers to open a new window to chemical analyses of interstellar dust grains as measured by the Cosmic Dust Analyser (CDA) in the saturnian system. This proposal contains four major tasks: ) Preparation and characterization of cosmic dust analogue samples for use in a Van-de-Graaff accelerator, b) Hyper-velocity impacts onto Stardust foil analogues and impact ionization target plates, c) Studies of impact crater morphologies, impact residues with simultaneous mass spectral analyses, and d) Data analyses with the Large Area Mass Analyser (LAMA) and with the CDA flight instrument.Impact phenomena will be examined at velocities above 7 km/s, producing an overlap between the velocities found for the Stardust interstellar dust collection campaigns and the higher velocities (>19 km/s) predicted for impacts onto CDA within the saturnian system. The ISPE work will be performed in cooperation with other SPP groups that are members of the ISPE collaboration (F. Brenker, Frankfurt, P. Hoppe, J. Leitner, MPI-C Mainz). The project is in the third phase and has a duration of two years.