In other words, the condition of intermittent discharge is preferably set so that the high frequency discharge is turned off before {HEAD ~ the DC bias voltage} achieves {TAIL ~ a constant maximum value} 
achieves
In other words , the condition of intermittent discharge is preferably set so that the high frequency discharge is turned off before { HEAD ~ the DC bias voltage } achieves { TAIL ~ a constant maximum value }
OTH 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 HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL