Engineering topics

Mackie, W. A.

Publications and source records attributed to Mackie, W. A..

2 records

NASA NTRS2002

Field emission array cathode material selection for compatibility with electric propulsion applications

In the investigation discussed in this paper, the response of FEA cathodes and FEA material candidates to simulated electric propulsion system environments are presented.

field emission cathodes electric propulsion↗

NASA NTRS1971

Work function measurements by the field emission retarding potential method

Using the field emission retarding potential method true work functions have been measured for the following monocrystalline substrates: W(110), W(111), W(100), Nb(100), Ni(100), Cu(100), Ir(110) and Ir(111). The electron elastic and inelastic reflection coefficients from several of these surfaces have also been examined near zero primary beam energy.

Swanson, L. W.↗