Comparative Vacua Produced by Different Oils in a Diffusion Pump

Abstract

IN our previous communication1 it was noted that the vapour pressure of the pump fluid affects the total vacuum only by a minor fraction, and the pump continues to exhaust air from the chamber to be evacuated to a pressure far below the vapour pressure of the fluid. A picture of the pumping action has also been suggested.

References

  1. 1

    Ray and Sengupta, Nature, 155, 727 (1945).

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  2. 2

    Ray and Sengupta, Science and Culture, 10, 560 (1945).

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RAY, K., SENGUPTA, N. Comparative Vacua Produced by Different Oils in a Diffusion Pump. Nature 156, 636 (1945). https://doi.org/10.1038/156636a0

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