This is a customized Hall thruster.
Disclosure: I was involved in that project.
Disclosure: I was involved in that project.
[0] http://erps.spacegrant.org/uploads/images/images/iepc_articl...
There were also several precursor experimental studies funded by ESA, one of which [1] can be found in the same conf. proceeding.
[1] http://erps.spacegrant.org/uploads/images/images/iepc_articl...