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After Lockheed Martins announcement that they were developing a fusion reactor that might fit on the back of a pickup truck, I got into a conversation with someone about how one would shield such a device.
So I found some tables that described the cross section of protons at different energy levels through different materials. But turning that into a statement such as "you'll loose about half the protons for every 2 inches of Boron-6" involves formulas and conversions that are not presented clearly in any of the sources I ran into.
I'm sure its not as simple as "half the protons every whatever distance", but there should be some way of getting some rough estimate expressed in those terms.
So I found some tables that described the cross section of protons at different energy levels through different materials. But turning that into a statement such as "you'll loose about half the protons for every 2 inches of Boron-6" involves formulas and conversions that are not presented clearly in any of the sources I ran into.
I'm sure its not as simple as "half the protons every whatever distance", but there should be some way of getting some rough estimate expressed in those terms.