On the accuracy of thermionic electron emission models. I. Electron detachment from SF6−

On the accuracy of thermionic electron emission models. I. Electron detachment from SF6(-).

Detailed statistical rate calculations combined with electron capture theory and kinetic modeling for the electron attachment to SF(6) and detachment from SF(6)(-) [Troe et al., J. Chem. Phys. 127, 244303 (2007)] are used to test thermionic electron emission models. A new method to calculate the specific detachment rate constants k(det)(E) and the electron energy distributions f(E,epsilon) as f...

Thermionic electron emission microscopy of metal-oxide multilayers on tungsten

Introduction Thermionic cathodes are used in many industrial vacuum electronic applications. Vacuum tubes for high-frequency or high-power applications are one example (e.g., see [1]). The emission properties of thermionic electron sources in vacuum devices are often Bimproved[ by the addition of oxide coatings on the metal cathode surface [2, 3]. The explanation of the improvement is usually b...

Shedding New Light on Thermionic Electron Emission of Fullerenes

Thermionic and Photo-Excited Electron Emission for Energy-Conversion Processes

*Correspondence: Timothy S. Fisher , Birck Nanotechnology Center, 1205 West State Street, West Lafayette, IN 47907, USA e-mail: [email protected] This article describes advances in thermionic and photo-emission materials and applications dating back to the work on thermionic emission by Guthrie (1873) and the photoelectric effect by Hertz (1893). Thermionic emission has been employed for elec...

Low Emittance Thermionic Electron Guns*