Julian Dossett is a freelance writer living in Santa Fe, New Mexico. He primarily covers the rocket industry and space exploration and, in addition to science writing, contributes travel stories to New Mexico Magazine. In 2022 and 2024, his travel writing earned IRMA Awards. Previously, he worked as a staff writer at CNET.
3D-printed 'hydrogels' could be future space radiation shields for astronaut trips to Mars : Read more I wonder about the weight. These seem like a good idea for protection but when soaked with water will add considerable weight.
Essentially wearing a full body soaked diaper.Reply Shielding of very high energy massive ions requires many tiny collisions to remove the energy. We don't want dangerous secondary radiation. Hydrogen is the best but is difficult to work with, water works very well. The problem with water is leakage. Hydrogel is just as good as water since it has lots of low Z atoms also, plus it won't leak.We use water to absorb nuc particle velocity and transfer that energy for electrical production. Works great. And can respond to load quickly.And I would guess that gel is also temp sensitive. Some of these new metal foams can hold more H than our pressurized vessels can. A metal foam might turn out to be a very good fuel tank, or a fuel tanker. Or fuel station. Is Pluto a planet or not? Who cares! Our love for the King of the Kuiper Belt is stronger than ever 95 years later
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