Vacuum Factor

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Vacuum Factor

 

(in Russian, vakuumfaktor). (1) The suction coefficient. The ratio of the actual rate of evacuation of a vacuum pump to its theoretical maximum value. (The suction coefficient is often called the Ho coefficient after the Japanese scientist who introduced the concept.)

(2) A rarely used term indicating the ratio of the ion current of a multielectrode electron tube to its electron current, which serves to measure the residual gas pressure in the tube.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.