TY - GEN AU - Lev,Dan AU - Alon,Gal AU - Appel,Leonid TI - Low current heaterless hollow cathode neutralizer for plasma propulsion-Development overview SN - 1089-7623 PY - 2019///1202 N1 - Publication Type: Journal Article UR - https://doi.org/10.1063/1.5097599 ER -