[Ground-station] Need some nuclear science help

[Bruce Perens]

http://mstl.atl.calpoly.edu/~bklofas/Presentations/DevelopersWorkshop2014/
Thomsen_Shields-1.pdf
https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=3248&context=smallsat




On Sat, Jun 2, 2018 at 10:13 AM, Bruce Perens <bruce at perens.com> wrote:

> We've recently heard proposals and seen some research regarding the use of
> radiation shielding to make it possible to use consumer or industrial grade
> parts rather than rad-hard ones. A cubesat called ShieldSat 1 flew to test
> some of this. My mostly-innumerate grasp of atomic science tells me that
> this can only go so far, and that when high-energy particles hit shielding,
> you get a particle shower that is sometimes more harmful than the original
> particle. But I don't have numbers.
>
> The proposal is to use the outer layer of structural aluminum, and an
> inner laminate of tantalum, titanium, and other dense materials with
> different atomic numbers from each other. Using titanium directly as the
> structural material, rather than aluminum, is possible; but it takes a more
> sophisticated (and expensive) laser cutter, and it has to be heated to be
> bent without cracking.
>
> What I'd like to hear would be numbers for reasonable thicknesses of these
> materials, and the degree to which they can, for example, make a
> van-Allen-crossing orbit look like LEO.
>
>     Thanks
>
>     Bruce
> --
> Bruce Perens K6BP - CEO, Legal Engineering
> Standards committee chair, license review committee member, co-founder,
> Open Source Initiative
> President, Open Research Institute; Board Member, Fashion Freedom
> Initiative.
>



-- 
Bruce Perens K6BP - CEO, Legal Engineering
Standards committee chair, license review committee member, co-founder,
Open Source Initiative
President, Open Research Institute; Board Member, Fashion Freedom
Initiative.
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