The RAE/Culham T4 10cm Electron-Bombardment Mercury Ion Thruster.

Abstract : The RAE/Culham T4 thruster is described with particular reference to its suitability for N-S station-keeping on planned European communication satellites and for many other possible missions. Details are given of the design, construction, testing and performance, including the characteristics and life-test experience of components such as vaporisers, isolators and grids. The accuracy of the physically-based scaling laws used in the design is demonstrated. Special reference is made to the excellent thermal stability and performance of the grid system, to efforts made to minimise grid erosion, and to the flexibility offered by a large throttling range.