Deflection control structure has holes through which the beams may pass with a set of x y deflection electrodes associated with {HEAD ~ each} of the holes for x y control of {TAIL ~ the trajectory} of each of the beams 
Deflection control structure has holes through which the beams may pass with a set of x y deflection electrodes associated with { HEAD ~ each } of the holes for x y control of { TAIL ~ the trajectory } of each of the beams
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH