propulsion device in the Soviet Union. In the US, scientists focused on developing gridded ion thrusters.

Soviet designs

Two types of Hall thrusters were developed in the Soviet Union:
* thrusters with wide acceleration zone, SPT (; , Stationary Plasma Thruster) at Design Bureau Fakel
* thrusters with narrow acceleration zone, DAS (; , Thruster with Anode Layer), at the Central Research Institute for Machine Building

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