To prove this technology, the NIAC is supporting it with a Phase III grant after successfully completing Phase I and Phase II over the past few years. Phase III comes with $2 million in funding for two years to continue the development of the material used on the solar sail, culminating in ground tests that could presage a move to use in deep space.
Deep space is the most likely place for an application such as these diffractive sails. In particular, the researchers think they will be instrumental in heliophysics. Traditional propulsion technologies don’t work well around the sun’s poles, given the magnetic interference in that space. Traditional solar sails wouldn’t work well either, as the incident light falling on them in these locations would either push them farther away from the sun or not push them at all.
Weekly Space Hangout with UT publisher Fraser Cain & Amber Dubill – lead researcher on the diffractive solar sail technology. With a diffractive solar sail, a spacecraft could still orient itself in the right direction while also using the force from light to move effectively. This would allow a craft equipped with one to observe the sun from an angle never before seen. But there’s still a long way to go before any craft is outfitted with one. The funding path past Phase III of NIAC is murky at best for now, and there will still be more development work left to be done after two more years of development.
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