The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper considers the transition from field emission according to the Fowler-Nordheim equation to the space charge limited regime. It extends previous works to the quantum limit and to the relativistic limit. These studies are fundamental to nano-scale emitters and relativistic diodes, key components for high power microwave generation
Summary form only given. A field enhancement factor is often required at the macroscopic scale in order to explain field emission current densities due to geometric features. The local field enhancement factor beta is often introduced in the Fowler-Nordheim equation to represent the geometrical effects at the surface of cathode. Local variation of beta determines the local dependence of injection...
Summary form only given. Fowler-Nordheim law gives the current density extracted from a surface under strong fields, by treating the emission of electrons from a metal-vacuum interface in the presence of an electric field normal to the surface as a quantum mechanical tunneling process. Child's law predicts the maximum transmitted current density by considering the space charge effect. So when the...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.