In order to provide the desired isotope separation, {TAIL ~ the deflection section} 14 should provide {HEAD ~ enough displacement} or velocity change to allow physical separation of the excited molecules from the molecules which are unaffected by the laser irradiation with a sufficiently large through put to be useful in the sense of providing a significant volume or quantity of enriched gas output 
In order to provide the desired isotope separation , { TAIL ~ the deflection section } 14 should provide { HEAD ~ enough displacement } or velocity change to allow physical separation of the excited molecules from the molecules which are unaffected by the laser irradiation with a sufficiently large through put to be useful in the sense of providing a significant volume or quantity of enriched gas output
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD 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 OTH OTH OTH OTH OTH OTH