The focusing magnet acts essentially like {TAIL ~ a lens} for paramagnetic molecules and has a gradient perpendicular to its axis having {HEAD ~ a magnetic fieldstrength} which is greatest next to the pole pieces and diminishing to zero at the axis 
The focusing magnet acts essentially like { TAIL ~ a lens } for paramagnetic molecules and has a gradient perpendicular to its axis having { HEAD ~ a magnetic fieldstrength } which is greatest next to the pole pieces and diminishing to zero at the axis
OTH OTH OTH OTH OTH OTH 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH