Cylindrical hot cathode ionisation gauge – The concept and simulations.

A novel design of an ionisation vacuum gauge is presented, aiming to achieve predictable sensitivity and high accuracy in high and the ultra-high vacuum range. The proposed design features a belt-like electron beam emitted from a linear filament, following a circular trajectory between two cylindrical electrodes, resembling a cylindrical analyser. The proposed design offers several key upsides: a precisely defined electron beam trajectory with reduced susceptibility to path variations, effective electron collection in a Faraday cup able to contain secondary emissions and backscattered electrons, and the inclusion of a suppressor grid in front of the ion collector to eliminate ion-induced secondary electron emission. These features are expected to secure high stability of the gauge and the low pressure limit. An in-depth description of the design is presented, along with the discussions on simulations of the key components that provide the improved performance. • Novel ionisation gauge design to achieve high accuracy and long term stability. • Circular electron trajectories with reduced susceptibility to variations. • Faraday cup electrode enhances accuracy with effective capture secondary particles. • Suppressor grid reduces IISEY ensuring ion current measurement stability. • Very good agreement between the simulated and experimental sensitivity. [ABSTRACT FROM AUTHOR]