{HEAD ~ A voltage divider} is connected between the negative side or cathode and {TAIL ~ ground} and an intermediate point on the divider is connected to a focusing electrode in the x ray tube for providing a focusing bias voltage 
is connected between
{ HEAD ~ A voltage divider } is connected between the negative side or cathode and { TAIL ~ ground } and an intermediate point on the divider is connected to a focusing electrode in the x ray tube for providing a focusing bias voltage
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL OTH OTH OTH OTH OTH OTH 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