抄録
Construction of an ion cyclotron mass spectrometer is reported. The apparatus has been built with electromagnet and analyzer cell Varian Associates and is similar to that described by Beauchamp, Anders and Baldeschwieler. Details of the spectrometer are described. The theory of ionci motion in the analyzer cell is presented in order to compare with performance of the spectrometer. The instrument is sensitive to as few as ten ions in the analyzer cell and a resolution has been found to be about 1, 100 at m/e 84 with the resonance frequency of 153 kHz. Half-width at half maximun of the collision-broadened absorptin line of N2+ in their parent gas has been measured as a function of pressure and the collision cross section and ion mobility of N2+ have been calculated as 210±30Å 2 and 1.83±0.30 cm2/V·sec, respectively.
