{TAIL ~ a magnetic circuit} for establishing a magnetic field necessary for magnetizing electrons and preventing them from straight motion from {HEAD ~ a cathode neutralizer} to anode 
{ TAIL ~ a magnetic circuit } for establishing a magnetic field necessary for magnetizing electrons and preventing them from straight motion from { HEAD ~ a cathode neutralizer } to anode
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH