AVS 49th International Symposium
    Vacuum Technology Wednesday Sessions
       Session VT-WeA

Paper VT-WeA3
The Effect of Ambient Temperature on the Sensitivity of Hot-Cathode Ionization Gauges

Wednesday, November 6, 2002, 2:40 pm, Room C-104

Session: Vacuum Measurements, Components, and Control
Presenter: P. Abbott, National Institute of Standards and Technology
Authors: P. Abbott, National Institute of Standards and Technology
P. Mohan, National Physical Laboratory, India
Correspondent: Click to Email
A recent comparison of the high vacuum standards of several National Metrology Institutes (NMIs) was performed over the range of 10@super -6@ to 10@super -3@ Pa using hot-cathode and spinning rotor gauges as transfer standards. Among the participants, their laboratory ambient temperatures varied by as much as five degrees Celsius. It is necessary to know how laboratory temperature affects the sensitivity of the hot-cathode transfer standards (spinning rotor gauges explicitly account for the gas temperature) so that individual laboratory results can be corrected accordingly. The results are presented for an experiment in which the sensitivities of several hot-cathode ionization gauges were measured for ambient laboratory temperatures between 23 and 31 degrees Celsius. It was found that all of the ionization gauges exhibited very similar behavior, and that the sensitivity dependence on temperature could be adequately modeled with a linear fit over the investigated temperature range.