SYMPOSIA PAPER Published: 01 January 1961
STP41240S

Gas Composition During Pumping and in Sealed-off Power Tubes

Source

Gas residues in electron tubes may originate from the tube materials, from gas permeation, and also from vapor picked up from pump environment. A bakeable radiofrequency-type mass spectrometer tube of an ion-gage size was used for measuring the gas composition during the pumping of electron tubes, and also in sealed-off power tubes during their processing and life. It was found that the gas composition in a sealed-off cold tube is extremely different from gas compositions measured during operation of the same tube. These changes are usually reversible. Irreversible changes in the gas environment of the tube may take place during its processing, operation, and also in life. Sudden changes in the gas environment may occur due to changes in operating conditions with respect to filament temperature or electron current of the tube.

Author Information

Váradi, P., F.
The Machlett Laboratories, Inc., Springdale, Conn.
Langer, H., A.
The Machlett Laboratories, Inc., Springdale, Conn.
Saltzman, M., N.
The Machlett Laboratories, Inc., Springdale, Conn.
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Details
Developed by Committee: F01
Pages: 193–203
DOI: 10.1520/STP41240S
ISBN-EB: 978-0-8031-5963-1
ISBN-13: 978-0-8031-6117-7