A mass spectrometer 10 comprises {TAIL ~ an ion source} 12 which generates nebulized ions which enter an ion cooler 20 via {HEAD ~ an ion source} block 16 
A mass spectrometer 10 comprises { TAIL ~ an ion source } 12 which generates nebulized ions which enter an ion cooler 20 via { HEAD ~ an ion source } block 16
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH