Patent ID: 9593996
Date: 2017-03-14
CPC Classifications: G01L,H01J

Claim:
1. An ionization gauge to measure pressure comprising: an extended anode structure comprising a grid extending along a longitudinal axis, the grid defining an ionization volume within the grid in which electrons impact gas molecules and atoms, opposite ends of the grid defining opposite ends of the ionization volume; a hot cathode electron source that emits electrons into the ionization volume, the electron source being positioned at one of the opposite ends of the ionization volume; and an ion collector electrode to collect ions formed by collisions between the electrons, emitted by the hot cathode electron source, and gas molecules and atoms, to provide a gas pressure output, the ion collector electrode extending through the ionization volume within the grid along an ion collector axis substantially parallel to the longitudinal axis of the grid, the ion collector axis extending through the opposite ends of the ionization volume.