{TAIL ~ Plasma} is generated within the space to cause dissociation of {HEAD ~ the hydrogen} containing gas and promote a reaction between the material and hydrogen containing gas 
{ TAIL ~ Plasma } is generated within the space to cause dissociation of { HEAD ~ the hydrogen } containing gas and promote a reaction between the material and hydrogen containing gas
TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH