Stuttgart 2012 – wissenschaftliches Programm
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MS: Fachverband Massenspektrometrie
MS 6: Poster
MS 6.9: Poster
Dienstag, 13. März 2012, 16:30–19:00, Poster.IV
A Detector for 3D Molecular Fragmentation Imaging at the Cryogenic Storage Ring — •Arno Becker1, Klaus Blaum1, Claude Krantz1, Oldřich Novotný2, Andrey Shornikov1, Kaija Spruck3, and Andreas Wolf1 — 1Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg — 2Columbia Astrophysics Laboratory, 550 West 120th Street, New York, NY 10027, USA — 3Institut für Atom- und Molekülphysik, Leihgesterner Weg 217, 35392 Giessen
The electrostatic Cryogenic Storage Ring (CSR), currently under construction at the Max-Planck-Institute for Nuclear Physics in Heidelberg, will enable long time storage of slow molecular ions with energies up to 300 keV and low blackbody radiation corresponding to the ∼10 K temperature of the storage ring enclosure. Under these conditions, polyatomic ions up to high masses can be prepared in or near the rovibrational ground state. Their fragmentation can be studied by fast-beam coincidence fragment momentum imaging. A detection system for 3D imaging of neutral fragments from Dissociative Recombination reactions is being developed. The requirements of the CSR regarding the huge temperature range from operation at ∼10 K to bakeout at ∼520 K as well as an extremly high vacuum of 10−13 mbar place high demands on the detector design. The use of an MCP-based detector with a multi-hit-capable position- and time-resolving delay-line anode is investigated. Simulations of the achievable multi-hit resolution performance for typical fragmentation events to be studied at the CSR and the cryogenic implementation will be presented.