Over a 3 1/2-year development period, from 1966 to 1970, NASA's Lewis Research Center undertook an effort to
design, fabricate, and qualify a new ion thruster system and the supporting spacecraft
components for the SERT 2 (Space Electric Rocket Test) mission. It was launched in 1970 on
a Thorad-SLV2G Agena-D rocket from
Vandenberg Air Force Base, CA under the management of NASA Lewis. SERT 2 carried two ion
thrusters, one operating for more than five months and the other for nearly three months.
Extended ion thruster restarts from 1973 to 1981 were conducted, in addition to
cross-neutralization tests. Tests of a reflector erosion experiment were continued in 1989
to 1991. The continuing performance of spacecraft subsystems, including the solar arrays,
over the 1970-1991 period was also monitored as well as thruster-spacecraft interactions.
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