Polywell transportation: how small?

If polywell fusion is developed, in what ways will the world change for better or worse? Discuss.

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DeltaV
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Postby DeltaV » Sat Jan 30, 2010 9:04 pm


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Postby Heath_h49008 » Sat Jan 30, 2010 9:26 pm


93143
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Postby 93143 » Sat Jan 30, 2010 10:28 pm


Stoney3K
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Postby Stoney3K » Sun Jan 31, 2010 12:42 pm

Because we can.

93143
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Postby 93143 » Sun Jan 31, 2010 9:44 pm


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Postby IntLibber » Fri Mar 19, 2010 3:42 am


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Postby MSimon » Fri Mar 19, 2010 3:59 am


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Postby tombo » Sun Mar 21, 2010 10:23 pm

-Tom Boydston-
"If we knew what we were doing, it wouldn’t be called research, would it?" ~Albert Einstein

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Postby kunkmiester » Mon Mar 22, 2010 3:39 am

Evil is evil, no matter how small

tombo
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Postby tombo » Mon Mar 22, 2010 6:05 am

-Tom Boydston-

"If we knew what we were doing, it wouldn’t be called research, would it?" ~Albert Einstein

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Postby Skipjack » Mon Mar 22, 2010 10:15 am


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Postby D Tibbets » Mon Mar 22, 2010 4:16 pm

To error is human... and I'm very human.

93143
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Postby 93143 » Tue Mar 23, 2010 2:43 am

I don't recall if I've admitted this before, but I've been using to get X-ray and gamma attenuation lengths in lead.

The primary shielding worry is the gamma rays from the main fusion reaction (4, 12, and 16 MeV; take a look at the chart to see why that's bad). If it turns out that the one source that claims p-¹¹B can emit gamma rays is wrong about either the possibility or the intensity, or that the intensity changes with the plasma energy distribution, then the gamma shielding requirement might be reduced or eliminated.

There's still bremsstrahlung, and a pittance of 0.5 MeV neutron absorption gammas, but I can't see the lead shield needing to be even half as thick without the reaction gammas even in the worst-case scenario (high-voltage operating point with thermal bremsstrahlung, more intense than predicted)...

DeltaV
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Postby DeltaV » Tue Mar 23, 2010 6:12 am


93143
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Postby 93143 » Tue Mar 23, 2010 7:00 am



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