Different parts of a reflectron type time of flight mass spectrometer for a qualitative analysis of cometary gases were built by using the hard, laser and high temperature brazing techniques. The technical requirements for the ion body were ultra-high vacuum capability, high voltage capability and gold plated electrodes at a maximum body size of 30 mm x 45 mm. In order to achieve these requirements, alumina ceramic, molybdenum and niobium were jointed. The metals were jointed with the laser brazing technique using titanium as brazing filler material. Metal-alumina joints were relized with an indium-copper-silver alloy. By using a modified brazing device, geometrical and shape tolerances of less than 0,02 mm were obtained throughout the ion body.
Präzisionsfügen durch Hart-, Hochtemperatur- und Laserlöten, am Beispiel von ionenoptischen Komponenten von Massenspektrometern für eine wissenschaftliche Weltraummission (Rosetta Rosina Mission der ESA)
Precision joining by brazing, high temperature and laser brazing on example of ion optics components of mass spectrometers for a scientific space mission (Rosetta Rosina for the ESA mission)
2001
4 Seiten, 7 Bilder, 4 Quellen
Aufsatz (Konferenz)
Deutsch
Rosetta orbiter spectrometer for ion and neutral analysis-Rosina
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