A novel scheme for the time-of-flight analysis of extended ion packets
A new scheme is proposed for providing enhanced time-of-flight focusing of spatially extended ion packets moving with close to uniform velocity, sufficiently high for reliable ion detection. The arrangement consists of two decelerating regions with homogeneous electric fields similar to the two-stage ion reflector. The decelerating field in the first decelerating stage is created in a pulsed fashion after the ion packet has entered the first region. The effect of fringe fields produced by shielding rings and the microchannel plate detector is discussed. Copyright 1999 John Wiley & Sons, Ltd.
Moskovets
E
Department of Chemistry, The George Washington University, Washington, DC 20052, USA.
Vertes
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