Applied Physics Technologies Expertise

• Long history of thermionic and field emission research
• Surface physics and work function analysis as applied to field emission and thermionic emission cathodes
• Field emission and thermionic emission cathode fabrication
• Structured field emitter array cathode deposition
• Field emission and thermionic cathode testing in UHV, Ar, O2, or other atmospheres
• Coating FE and FEA cathodes with thin films for performance enhancement
• Supplier of oriented single crystals of refractory metals, carbides, and borides

R&D Capabilities

• Work function measuring systems (photoelectron, FERP and absolute)
• Custom film deposition system (up to 6" wafer) with multi-component deposition control and monitoring. Film materials include; Mo, Nb, Pt, Hf, Ni, Ni-Nb, Au, Y, Mg, Ti, Si, C, ZrC, HfC, NbC, TiC, LaB6, SnO, and others
• Field emitter array deposition including liftoff layer and multi-part emitter options
• Auger surface analysis
• Thermionic emission measurements and surface analysis
• Field emission measurements over large range of currents and operating atmospheres
• Custom electron or ion optical modeling
• Custom electron or ion gun production including focusing and deflection

APTech's Key R&D Staff

• Dr. William A. Mackie
• Dr. Bud Magera
• Kevin Kagarice
• Gary Cabe
• Dr. Paul R. Davis
• Dr. Tianbao Xie
• Dr. Francis Charbonnier
• Paul H. McClelland