{HEAD ~ Ions} are gated out of the linear trap 30 into {TAIL ~ an electrostatic ion trap} 130 and are detected by a secondary electron multiplier 10 
are gated into
{ HEAD ~ Ions } are gated out of the linear trap 30 into { TAIL ~ an electrostatic ion trap } 130 and are detected by a secondary electron multiplier 10
HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH