Abstract
The emission current from a tungsten tip was measured as a function of O2 pressure (9.4×10-11∼3.9×10-9 Torr) and of tip temperature (1170∼1530°K). Following results have been shown: (1) With the elapse of time, a sequence of a minimum and a maximum appears in the emission current. (2) The minimum and the maximum decrease with increase in O2 pressure. (3) The maximum decreases as the tip temperature is lowered or raised from 1290°K. (4) The time t0 at which the maximum appears decreases as the O2 pressure p increases. Linear relations hold between log p and log t0; the slope of the straight line decreases with increase in the tip temperature. It is shown that a combined consideration of O2 adsorption and build-up of tungsten oxides may account for the results.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
