Tungsten-Rhenium Filament Lifetime Variability in Low Pressure Oxygen Environments Earle, G. D. ; Medikonduri, R. ; Rajagopal, N. ; Narayanan, V. ; Roddy, P. A. Abstract Publication: IEEE Transactions on Plasma Science Pub Date: October 2005 DOI: 10.1109/TPS.2005.856413 Bibcode: 2005ITPS...33.1736E