Sterilization of dielectric containers using a fore-vacuum pressure plasma-cathode electron source

12th International Conference on Gas Discharge Plasmas and Their Applications

Zolotukhin, D.^1 ; Burdovitsini, V.^1 ; Oks, E.^1,2 ; Tyunkov, A.^1 ; Yushkov, Yu^1

Tomsk State University of Control Systems and Radioelectronics, Tomsk

634050, Russia^1

Institute of High Current Electronics SB RAS, Tomsk

634055, Russia^2

关键词: Bacterial suspensions;    Biological objects;    Cylindrical containers;    Electron beam source;    Gas compositions;    Inner surfaces;    Low energy electron beams;    Vacuum pressure;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/652/1/012044/pdf
DOI  :  10.1088/1742-6596/652/1/012044

来源: IOP

【 摘 要 】

We describe our work on sterilization of 10 ml glass and 60 ml plastic cylindrical containers using a fore-vacuum pressure, plasma-cathode, electron beam source. Beam plasma is formed inside the vessel by injection of a low-energy electron beam at 3 - 6 keV energy and current of 50 mA, at a working gas (air) pressure of 8 Pa. The gas composition was tracked by a quadrupole gas analyzer type RGA-100. As a test biological object for sterilization we used E. coli ATCC 25922 bacteria, the inner surface of each vessel was inoculated with a bacterial suspension. We find a smooth dependence of the degree of sterilization on the total energy density injected into the vessel. The efficacy of sterilization of container inner surfaces using a fore-vacuum pressure, plasma-cathode e-beam source of relatively low energy (a few keV) electrons is thus demonstrated.