Patent ID: 9552970
Date: 2017-01-24
CPC Classifications: G01N,H01J

Claim:
1. A method of analysing ions comprising: (i) separating ions according to a physico-chemical property in a separator; (ii) transmitting ions which emerge from said separator through a transfer device with a first transit time t1, energising a pusher electrode or orthogonal acceleration electrode and obtaining first data; (iii) transmitting ions which subsequently emerge from said separator through said transfer device with a second greater transit time t2, energising said pusher electrode or orthogonal acceleration electrode and obtaining second data; and (iv) repeating steps (ii) and (iii) one or more times; wherein said method further comprises: energising said pusher electrode or orthogonal acceleration electrode with a period t3, wherein t2-t1 is arranged to equal t3/n and wherein n=2; and combining said first and second data to form a composite data set.