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CIDA Instrument

CIDA Instrument Drawing
CIDA instrument schematic drawing

The CIDA instrument is a mass spectrometer, which separates ions' masses by comparing differences in their flight times. The operating principle of the instrument is the following: when a dust particle hits the target of the instrument, ions are extracted from it by the electrostatic grid. Depending on the polarity of the target positive or negative ions can be extracted. The extracted ions move through the instrument, are reflected in the reflector, and detected in the detector. Heavier ions take more time to travel through the instrument than lighter ones, so the flight times of the ions are then used to calculate their masses.

In the picture below a spectrum measured under laboratory conditions (upper image) and a calibrated mass spectrum (lower image) are shown.

Laboratory Spectra

CIDA Laboratory Spectra