Citation
Abstract
This article describes the use of a turbo-molecular pump as an alternative to the getter-ion pumping systems normally used with the hydrogen maser; the preliminary results were excellent. The time required for pumpdown is about onethird that of the ion pump system. Argon, which is normally ion-pumped at a speed of about 5% of that of air, is removed at the same speed as air with the turbo-molecular pump. The amount of maintenance required for a turbo-molecular is less than for anion pump; ion pump elements have to be replaced once a year which means turning off the maser, installing new elements, and disturbing the maser, a process which requires several days. Turbo-molecular pump manufacturers claim 5 years or more without servicing.
Details
- Volume
- XVI
- Published
- August 15, 1973
- Pages
- 69–71
- File Size
- 957.3 KB