{HEAD ~ The diameter} of {TAIL ~ channel} 34 of magnet 36 should increase with length, as shown in FIG 1, so as to have the radius of the poles always equal to the off axis displacement of the outermost molecules to be focused 
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{ HEAD ~ The diameter } of { TAIL ~ channel } 34 of magnet 36 should increase with length , as shown in FIG 1 , so as to have the radius of the poles always equal to the off axis displacement of the outermost molecules to be focused
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH