High-voltage array ground test for direct-drive solar electric propulsion

Development is underway on a unique high-power solar concentrator array called stretched lens array (SLA) for direct drive electric propulsion. These SLA performance attributes closely match the critical needs of solar electric propulsion (SEP) systems, which may be used for “space tugs” to fuel-efficiently transport cargo from low Earth orbit (LEO) to low lunar orbit (LLO), in support of NASA's robotic and human exploration missions. Later SEP systems may similarly transport cargo from the Earth–Moon neighborhood to the Mars neighborhood.This paper will describe the SLA SEP technology, discuss ground tests already completed, and present plans for future ground tests and future flight tests of SLA SEP systems.