Engineering topics
Publications and source records attributed to Polk, J..
A major component in validating ion propulsion for use on future deep space and earth orbital missions is demonstrating that the engines have sufficient service life capability.
Lithium Lorenza Force Accelerators (LFA's) are capable of processing very high power levels and are therefore applicable to a wide range of challenging missions.
More than 30 years after its inception, ion propulsion is finally being considered for practical applications.
Described is a Particle-in-Cell with Monte Carlo Collision code developed to perform detailed three-dimensional ion thruster simulations. To capture the full kinetic behavior of ion thruster plumes, both the electrons and ions are treated as test particles. Simulation results are given of the NSTAR ion thruster under ground test and in space conditions. Numerical results are compared.
This paper describes the results of a preliminary evaluation of a 1.35 kW anode layer thruster. Data on performance and plume characteristics will be presented. Data on thruster characteristics such as thrust, plume current densities, discharge voltage, discharge current, and mass flow rate along with the results of a 500-hour endurance test wear will be presented.