Year-end Sale % OFF 
Abstract
A model of low-current (Townsend) gas discharge in the presence of a thin insulating film on the surface of a cathode is formulated. It takes into account, along with ion-induced secondary-electron emission from the cathode, also the field emission of electrons from the cathode metal substrate into the film under a strong electric field, which is generated in the insulator when the current flows in the discharge. The emission efficiency of the film and the discharge characteristics are calculated as functions of its thickness. It is shown that the experimentally observed nonmonotonic dependences of the effective secondary-electron emission yield of the cathode and discharge ignition voltage on the film thickness can be explained by the nonuniformity of the electric-field distribution across the film.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
