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  3. 3. in ion mobility spectrometer, the ions are acce

3. In ion mobility spectrometer, the ions are accelerated under a constant electric field in a...

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Physics

3. In ion mobility spectrometer, the ions are accelerated undera constant electric field in a cylindrical tube and the time offlight of the ions in this tube is measured. The ions are detectedby using a sensor at the end of the tube. a) What type of sensorcan be used to detect the ions? b) The experiment is performed athigh frequencies to be able to decrease the effect of the noise.What type of noises can be present in this experiment?c) During theexperiment, many devices are used together. What type of groundingcan be used for this experimental setup to be able to preventfloating grounds and crosstalks? d)

t(s) x 10^-6? (cm^2 x V^-1 x s^-1 )
8.51100.0
7.01350.0
5.01600.0
3.51850.0
2.02100.0

The mobility of the ions is given as ? = ? ? 1 ? , where l, Eand t are the length of the tube, the electric field strength andthe time of flight, respectively. The data given in the tablebelongs to a specific type of spectrometer. By plotting this data,find the required length of the tube for an electric field strengthof 10^4 V/cm.

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