Preferably, the member includes a restrictor having the opening and in {TAIL ~ thermal contact} with the electromagnetically reactive portion and {HEAD ~ the providing means} includes means for producing electromagnetic radiation 
Preferably , the member includes a restrictor having the opening and in { TAIL ~ thermal contact } with the electromagnetically reactive portion and { HEAD ~ the providing means } includes means for producing electromagnetic radiation
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH