NASA has turned on the electric Hall thrusters of Psyche, a spacecraft that’s now gently motoring toward a metal-rich asteroid embedded in the main asteroid belt beyond Mars. The agency says Psyche is in “full cruise” mode now, six months after launching on October 13th, 2023, on a conventional, SpaceX rocket. On the way, NASA used Psyche to test laser-based deep space communications.
There are lots of different kinds of ion propulsion, including the magnetic Hall thrusters used by Psyche. In 2018, Psyche’s Spacecraft Chief Engineer wrote this detailed explanation of the differences between those and other ion thrusters, as well as other kinds like arc jets and microwave thrusters. NASA first used ion propulsion as a spacecraft’s main propulsion for 1998’s Deep Space 1, a mission specifically conducted to test “various advanced technologies for future interplanetary missions.
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