CubeSat thrusters are actually really exciting
Friday, July 12, 2013
I've found a Kickstarter campaign I think I'll be donating to - a drive for $200,000 to develop a thruster for interplanetary CubeSats, not by any mean organization but the University of Michigan:
The specs are as follows:
CAT engine specs:
Up to 2 mN thrust for 10W (20mN for 100W pulsed)
Up to 20,000 m/s plasma exhaust velocity
Up to 10 Watts continuous (100W pulsed for 10min)
92% efficient solid-state DC to RF converter
Expected engine lifetime, >20,000 hrs of operation
Expected propellant: Iodine or Water
Expected propellant mass: <2 .5="" br="" kg="">
3U CubeSat (30 cm x 10 cm x 10 cm)
2.5 kg dry mass (5 kg total mass)
20 W of power produced from deployable solar panels
Passive magnetic attitude stabilization from nozzle magnets interacting with Earth's magnetic field
Anticipated lifetime in LEO: 5 yrs (radiation limit for onboard chips)
Anticipated lifetime beyond Earth: 10 yrs (battery lifetime)2>
A 30 cm length and 2.5 kg dry mass means that the CubeSat can simply hitch a ride along with a much larger satellite, wait for it to enter its orbit and then quietly begin its own trip to its destination.
The CAT engine is being developed at the University of Michigan’s Plasmadynamics and Electric Propulsion Laboratory (PEPL).It's exciting because CubeSats are incredibly cheap, about a thousand times cheaper than your average probe, and having a thruster of this type would make missions such as flybys to a huge number of small asteroids possible. With a real thruster, a flyby (or even orbit?) of my favourite asteroid 24 Themis is doable as well. What has prevented us so far from exploring these bodies has been cost: a mission in the hundreds of millions of dollars will always need a high-priority target, such as a major planet (Venus, Mars, Jupiter) or multiple destinations (Vesta + Ceres), or a demonstration of new technology along with some science return, in which case a less well-known destination is possible.
The specs are as follows:
CAT engine specs:
Up to 2 mN thrust for 10W (20mN for 100W pulsed)
Up to 20,000 m/s plasma exhaust velocity
Up to 10 Watts continuous (100W pulsed for 10min)
92% efficient solid-state DC to RF converter
Expected engine lifetime, >20,000 hrs of operation
Expected propellant: Iodine or Water
Expected propellant mass: <2 .5="" br="" kg="">
3U CubeSat (30 cm x 10 cm x 10 cm)
2.5 kg dry mass (5 kg total mass)
20 W of power produced from deployable solar panels
Passive magnetic attitude stabilization from nozzle magnets interacting with Earth's magnetic field
Anticipated lifetime in LEO: 5 yrs (radiation limit for onboard chips)
Anticipated lifetime beyond Earth: 10 yrs (battery lifetime)2>
A 30 cm length and 2.5 kg dry mass means that the CubeSat can simply hitch a ride along with a much larger satellite, wait for it to enter its orbit and then quietly begin its own trip to its destination.
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