Investigation of the corona current in a vacuum bulb

18th International Summer School on Vacuum, Electron and Ion Technologies

Chyhin, Vasyl^1

Lviv Academy, 32 Hvardiyska, Lviv, Ukraine^1

关键词: Attachment and detachments;    Corona currents;    Gas molecules;    Gas pressure sensor;    High-speed sensors;    Ion-electron emission;    Negative corona;    Strong heterogeneities;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/514/1/012048/pdf
DOI  :  10.1088/1742-6596/514/1/012048

来源: IOP

【 摘 要 】

The dependence of the negative corona current on the gas pressure was studied experimentally and theoretically in view of designing a gas-pressure sensor to be applied in the production of light bulbs. The gas pressure was varied in the range 1×10-2Torr - 7.4×102Torr. The dependence of the current on the gas pressure is characterized by a strong heterogeneity. This allowed the implementation of a prototype of a high-speed sensor for a wide range of gas pressures. A mathematical model was developed of the negative corona current behavior by taking into account the ionization of the gas molecules, the attachment and detachment of electrons, the charge drift and the surface ion-electron emission. The results of the numerical simulations describe satisfactorily the experimental dependences.