One known way to improve the efficiency of glow discharge sputtering is to use magnetic fields to confine {HEAD ~ electrons} to {TAIL ~ the glow region} in the vicinity of the cathode/target surface 
One known way to improve the efficiency of glow discharge sputtering is to use magnetic fields to confine { HEAD ~ electrons } to { TAIL ~ the glow region } in the vicinity of the cathode / target surface
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH