Hannover 2010 – scientific programme
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MS: Fachverband Massenspektrometrie
MS 2: Speicherringe und neue Entwicklungen
MS 2.3: Talk
Monday, March 8, 2010, 17:30–17:45, F 428
A mass sensitive imaging detector for storage-ring molecular fragmentation studies — •Christian Nordhorn1, Henrik Buhr2,1, Dennis Bing1, Manfred Grieser1, Oded Heber2, Claude Krantz1, Michael Lestinsky1, Mario B. Mendes1, Oldřich Novotný1, Michael L. Rappaport2, Roland Repnow1, Andrey Shornikov1, Julia Stützel1, Dirk Schwalm2,1, Daniel Zajfman2, and Andreas Wolf1 — 1Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg — 2Weizmann Institut of Science, Rehovot, 76100, Israel
In astrophysically relevant plasmas dissociative recombination is considered the principal destruction mechanism for molecular ions. Consequently remote probes of interstellar media require extensive comprehension of essential process characteristics, which are investigated in molecular fragmentation studies.
To enhance these studies an energy-sensitive multi-strip surface-barrier detector (EMU) has been developed, which introduces mass identification of individual recombination products and a simultaneous determination of the fragment positions in the detector plane by coincidence imaging. This enables advanced investigations of the final state branching ratios into the different fragmentation channels, the excitation of the molecular fragments and the dissociation kinematics.
Utilizing the capability of the EMU detector a storage-ring experiment on the dissociative recombination of DCO+ has been performed applying the merged beam technique provided by the Test Storage Ring (TSR) at the Max Planck Institute for Nuclear Physics.