Since beam 142 is collimated, {TAIL ~ the ideal form} for {HEAD ~ the injected beam} is also collimated 
Since beam 142 is collimated , { TAIL ~ the ideal form } for { HEAD ~ the injected beam } is also collimated
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH