1. 1Walker, M. L. "Effects of Facility Backpressure on the Performance and Plume of a Hall Thruster," Ph.D. Dissertation, Aerospace Engineering Dept.Univ. of Michigan, Ann Arbor, MI,Dec. 2005.
2. 2Beal, B. E. "Clustering of Hall Effect Thrusters for High-Power Electric Propulsion," Ph.D. Dissertation, Aerospace Engineering Dept.Univ. of Michigan, Ann Arbor, MI,Oct. 2004.
3. The Air Force Clustered Hall Thruster Program
4. Test facilities for high-power electric propulsion