| 摘要 |
FIELD: physics. ^ SUBSTANCE: proposed device comprises ion mobility spectrometre, ion-optical lenses, interface of differential pump-out, time-of-flight analyser and ion detector. Note here that ion mobility spectrometer comprises ion formation chamber, drift tube with aperture element, ion gate, drift zone, gas curtain zone of mass spectrometre, drift gas inlet and power supply. Ion source of mass spectrometre comprises axially symmetric casing with walls accommodating radially-directed sample intake and ionisation device with ionising agents. Point whereat said intake device axes intersect is located opposite the apex of aperture element representing a convex-face wall with hole to intake ion at its top. Time of flight analyser represents a cylindrical condenser accommodating assembly of orthogonal acceleration with ejector electrode and ion detector. ^ EFFECT: higher sensitivity and reduced sizes. ^ 4 cl, 3 dwg |
