Kiel 2004 – wissenschaftliches Programm

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P: Plasmaphysik

P 6: Staubige Plasmen I

P 6.3: Fachvortrag

Dienstag, 9. März 2004, 11:30–11:50, H\"orsaal H

Large Area Mass Analyzer — •Mikhail Rashev — Max-Planck institut für Kernphysik Saupfercheckweg 1 69117 Heidelberg

The presentation deals with the time-of-flight spectrometer for the chemical analysis of cosmic dust particles in space. The instrument is based upon impact ionization. This method is a high reliable method for in-situ dust detection and is well established. Those instruments flew on-board Helios, Galileo and are still in operation on-board Ulysses and Cassini-Huygens missions. The new instrument has a large sensitive area of 0.1m² to have significant number of measurements far from dust sources and a mass resolution M/Δ M ≥ 100 which covers the most relevant elements expected in cosmic dust. The instrument has a reflectron configuration which allows to increase the mass resolution. Most of the ions released during the impact are collected to the detector. The ion detector consist of a large area ion-to-electron converter, an electron reflectron and a microchannel plate detector.