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ESA – Pinhole propulsion for satellites

December 26, 2023
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ESA – Pinhole propulsion for satellites
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A palm-sized propulsion choice for future house missions: every one in every of these seven emitter arrays etched onto this silicon wafer utilizing micro- and nano-technology possesses greater than 500 pinhole-sized emitters that spray out ions, accelerated by way of an electrostatic subject to maximise thrust.

Inherently scalable, this ‘electrospray’ expertise is being developed as a cost- and mass-effective methodology of propelling CubeSats and different small satellites. For the primary time in Europe, this ionic-liquid primarily based electrospray propulsion system has achieved greater than 400 hours of steady operation.

 “Everybody is aware of that ‘house is difficult’, however we wish to say that ‘propulsion is more durable’,” feedback Daniel Pérez Grande, CEO & Co-founder of IENAI Space in Spain, creating the expertise for ESA. “Growing a brand new expertise, which we’ve got constructed from scratch, has been no straightforward feat, however we’re assured that our propulsion merchandise will stand out out there for his or her unimaginable efficiency and customisation capabilities; and in reality we’ve got already been approached by quite a lot of events within the business.”

Generally known as ATHENA (Adaptable THruster primarily based on Electrospray powered by Nanotechnology), this technique is one in every of three at the moment being developed by ESA to harness electrospray propulsion for house. ATHENA depends on conductive ionic-liquid salts as a gas. This liquid flows via nano-textured conical emitters to be accelerated between an emitter and an extractor working at completely different electrical potentials. The interplay between the floor stress of the liquid and the utilized electrostatic subject types ions which could be sprayed out at very excessive speeds (on the order of 20km/s), creating the pressure to maneuver the satellite tv for pc.

The micro-fabricated ATHENA system has the benefit of extremely customisable thrust, utilizing non-toxic ‘inexperienced’ propellants without having for pressurised tanks. And the thrusters could be clustered collectively freely as wanted – a complete of six would match onto the ten cm face of a single CubeSat unit. These items can then be additional clustered to ship thrust for satellites of as much as 50kg in mass.

The undertaking has now handed its Preliminary Design Evaluation, focusing on a last product by the top of subsequent yr. Improvement has been supported via ESA’s Common Assist Expertise Programme, readying modern services for spaceflight and the open market.

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