Bipolar Chemical Ionisation Mass Spectrometer for trace gas analysis onan aircraft

The Centre for Atmospheric Science has purchased a fast switching bipolar chemical ionisation mass spectrometer to facilitate trace gas analysis on the British Atmospheric Research Aircraft(ARA) operated by the Faculty for Airborne Atmospheric Measurements(FAAM). To allow a wide range of measurements, this instrument must facilitate the operation of multiple reagent ions (up to 6 simultaneously)that can be flexibly interchanged on the aircraft and provide complete measurement cycles at time resolution sufficient to allow useful measurements on the aircraft. The instrument must be of a sufficiently small size and weight tobe certified on this research aircraft.