{HEAD ~ The desired residence time} within {TAIL ~ the cracking chamber}, which is the time available for photolysis should be in the range of a few milliseconds to several hundred milliseconds 
{ HEAD ~ The desired residence time } within { TAIL ~ the cracking chamber } , which is the time available for photolysis should be in the range of a few milliseconds to several hundred milliseconds
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL 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