Heidelberg 1999 – scientific programme

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UP: Umweltphysik

UP 11: Poster: Atmosphärenphysik und Physikalische Altersbestimmung

UP 11.19: Poster

Friday, March 19, 1999, 12:45–14:30, KO

Negative chemiions formed in jet fuel combustion — •A. Kiendler, St. Aberle, and F. Arnold — Max-Planck Institut füer Kernphysik, Bereich Atmosphärenphysik, Heidelberg

Measurements were made of mass numbers and composition of negative chemiions produced in jet fuel combustion in the exhaust of a jet engine at the ground and a burner in the laboratory. The measurements made by a novel quadrupole ion trap mass spectrometer apparatus revealed the presence of three major ion families containing HSO₄⁻ "core", an NO₃⁻"core" and "OHC-ions". The latter which contain C- and H-atoms and to some part also O-atoms can be subdivided into two families with even and odd mass numbers. The high mass resolution and the tandem mass spectrometry possibility of the ion trap mass spectrometer led to the detection of many ion species and allowed greatly improved insights into the chemical nature and evolution of negative chemiions.