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.
A novel CNT-cathode ionization gauge was developed in this work, and its vacuum metrological characteristics in different gases were studied systematically. A good measurement linearity between normalized ion current and gas pressure is achieved from 10−8 to 10−4 Pa in N2, H2, O2 and air, respectively, and the linear response region for He only lies in the range from 10−7 to 10−4 Pa. The lowest measureable...
Vertically aligned carbon nanotube (CNT) arrays were fabricated by chemical vapor deposition (CVD) technique on different substrates. Microstructures and field emission characteristics of the as-grown CNT arrays were investigated systematically, and its application in ionization gauge was also evaluated preliminarily. The results indicate that the as-grown CNT arrays are vertically well-aligned relating...
This paper presents an investigation of carbon nanotube (CNT) emitter-based ionization gauge. The metrological performances of this CNT emitter-based ionization gauge were investigated and studied by numerical and experimental methods. The electron source was constructed with multi-wall nanotubes (MWNT), which were grown on stainless steel substrate using thermal chemical vapor deposition (CVD) technique...
In this work, carbon nanotubes (CNTs) cathodes were directly prepared on catalytic hastelloy substrates by chemical vapor deposition technique (CVD). The field emission properties of the CNTs cathode were estimated under an ultrahigh vacuum system with a diode structure. The results showed that the present cathode has excellent emission stability with a high current density. Subsequently, this cathode...
The ionization gauge with carbon nanotube (CNT) cathode has many advantages such as low power consumption, fast response, small volume and free of thermal and light radiation etc, which are favorable for the measurement of extremely high vacuum. In this work, the CNT cathodes were grown on silicon substrate by thermal chemical vapor deposition (CVD), and the metrological characteristics of spherical...
Study of the ionization gauge with carbon nanotube cathode for carbon nanotube (CNT) field emission cathode, a high gate electrode voltage, as high as several hundred volts, is required to generate high emission field current. However, high gate potentials could affect the electric field distribution in the ionization space significantly, and the electron energies endowed by gate potential are relatively...
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.