## page was renamed from Experiments/ITCIMS #acl All:read #format wiki #language en Instrument:: ITMS Partner:: IPA DLR PI:: Schlager email:: hans.schlager@dlr.de tel:: 08153-28-2510 DesignOrganisation:: FX DesiredPosition:: ApT-11 DesiredCabinPosition:: 12 (35 kg) + 13 (pump, 185 kg) ModificationNumber:: AdditionalRequirements:: Modification:: PAN-MS Weight:: 220 Type:: insitu Status:: 1 Summary:: The Ion Trap Chemical Ionization Mass Spectrometer ITCIMS will be operated with CO3-reagent ions that react selectively with the trace gas molecules of interest in a flow reactor. The abundance of the trace gases to be measured is determined by the detected ratio of reagent and product ions by the ion trap mass spectrometer. For CIRRUS-RS we will concentrate on the measurements of HNO3, SO2 and PAN with a temporal resolution of 2s. We will use a subisokinetic forward-facing inlet in order to be able to measure particle-phase HNO3 in cirrus.