The cathodic arc source of the CAVAD system is located at {HEAD ~ one end} of {TAIL ~ the magnetic duct} 
of
The cathodic arc source of the CAVAD system is located at { HEAD ~ one end } of { TAIL ~ the magnetic duct }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL