A laser ion-mobility spectrometer |
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Authors: | G E Kotkovskii I L Martynov V V Novikova and A A Chistyakov |
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Affiliation: | (1) Moscow Engineering-Physics Institute (State University), Kashirskoe sh. 31, Moscow, 115409, Russia;(2) Shubnikov Institute of Crystallography, Russian Academy of Sciences, Leninskii pr. 59, Moscow, 119333, Russia |
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Abstract: | The process of ion-packet broadening in a longitudinal laser spectrometer of ion mobility is studied. The contributions of
the diffusion, Coulomb, and other broadening mechanisms are compared. The resolution of the developed spectrometer was measured
(R ∼ 45) in atmospheres of both purified air and pure nitrogen. The dependence of the spectrometer resolution on the drift voltage
was studied. The recorded spectra of a number of molecules of explosives with an extremely low pressure of saturated vapors
indicate a high sensitivity of the developed spectrometer (no worse than 10−14 g/cm3).
Original Russian Text ? G.E. Kotkovskii, I.L. Martynov, V.V. Novikova, A.A. Chistyakov, 2009, published in Pribory i Tekhnika
Eksperimenta, 2009, No. 2, pp. 110–116. |
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