A COMPARISON OF THE THERMIONIC AND PHOTOELECTRIC WORK FUNCTIONS FOR CLEAN TUNGSTEN By A. H. WARNBR
نویسنده
چکیده
منابع مشابه
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...
متن کاملDark current analysis of Si homojunction interfacial work function internal photoemission far-infrared detectors
A detailed theoretical investigation of dark current mechanisms is performed for a novel Si n-i homojunction interfacial work function internal photoemission ~HIWIP! far-infrared ~FIR! detector. Thermionic emission, thermionic field emission and field emission currents, including the image force effect, are calculated and compared as functions of bias voltage and temperature. The bias and tempe...
متن کاملPhoto- and thermionic emission from potassium-intercalated carbon nanotube arrays
Carbon nanotubes CNTs are promising candidates to create new thermionicand photoemission materials. Intercalation of CNTs with alkali metals, such as potassium, greatly reduces their work functions, and the low electron scattering rates of small-diameter CNTs offer the possibility of efficient photoemission. This work uses a Nd:YAG YAG denotes yttrium aluminum garnet laser to irradiate singlean...
متن کاملThermally assisted photoemission effect on CeB6 and LaB6 for application as photocathodes
The thermally assisted photoemission (TAPE) effect was investigated for the hexaboride thermionic cathodes (LaB6 and CeB6). It was found that the quantum efficiency of these cathodes can be increased by raising the cathode temperature along with the thermionic emission. In addition both materials can emit a measurable photoemission current by being irradiated with a laser having a photon energy...
متن کاملLinac-Beam Characterizations at 600 MeV Using Optical Transition Radiation Diagnostics
Selected optical diagnostics stations were upgraded in anticipation of low-emittance, bright electron beams from a thermionic rf gun or a photoelectric rf gun on the Advanced Photon Source (APS) injector linac. The upgrades include the installation of optical transition radiation (OTR) screens, transport lines, and cameras for use in transverse beam size measurements and longitudinal profile me...
متن کامل