thread for segments files and parameters for simulation runs

Discuss how polywell fusion works; share theoretical questions and answers.

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happyjack27
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Postby happyjack27 » Tue Nov 30, 2010 12:45 pm


BenTC
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Postby BenTC » Tue Nov 30, 2010 12:48 pm

In theory there is no difference between theory and practice, but in practice there is.

happyjack27
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Postby happyjack27 » Tue Nov 30, 2010 2:09 pm

ah, well on that note i'm actually thinking of switching the sim to D-T fusion at 2m, 'cause i can get the theoretical numbers for that from .

esp. in that it has the plasma density, a parameter that i've been looking for. then i have the added benefit of being able to compare theory with sim results. well, considering the sim doesn't model bremmstrag (whatever the spelling) and all that.

rjaypeters
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Postby rjaypeters » Tue Nov 30, 2010 3:48 pm

"Aqaba! By Land!" T. E. Lawrence

R. Peters

happyjack27
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Postby happyjack27 » Tue Nov 30, 2010 4:15 pm


happyjack27
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Postby happyjack27 » Tue Nov 30, 2010 4:47 pm

a few numbers here.

using the numbers on page 8 of . for a d-t fusion reactor scale polywell,

assuming that by "bulk density", they mean ions per cubic meter in the volume in the sphere circumscribed by the magrid.

volume of a sphere of radius r = v(r)=4/3*pi*r^3

volume = v(2 (listed)) = 33.510321638291127876934862754981 m^3
density (listed) = 2*10^20 / m^-3.
charge = 1 proton = 1.602176487*10^-19 coloumbs

volume * density = 6702064327658225575386.9725509963 total ions
volume * density * charge = 1073.7889880135472789027053347321 coloumbs total ion charge.

ion representation ratio = total ions / sim ion particle count(7168) =
934 997 813 568 390 844.780548625976

in other words, using those numbers, one colored dot in the simulation will represent about 934,997,813,568,390,845 particles.

that's a lot. thousand, million, billion, trillion, quadrillion, quintillion. 934 quintillion.

D Tibbets
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Postby D Tibbets » Tue Nov 30, 2010 5:25 pm

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

happyjack27
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Postby happyjack27 » Tue Nov 30, 2010 6:06 pm


icarus
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Postby icarus » Tue Nov 30, 2010 6:27 pm


happyjack27
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Postby happyjack27 » Tue Nov 30, 2010 6:43 pm


happyjack27
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Postby happyjack27 » Tue Nov 30, 2010 6:53 pm


rjaypeters
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Postby rjaypeters » Tue Nov 30, 2010 9:23 pm

We really must get better contractors!

Image Image

The reduction in radius has a large impact on this model. 15 degrees between coil centers wasn't much change from where the coil centers already were at close approach. I made the 15 degrees include the coil casings:

Casing close approach = 0.239m
Coil center close approach = 0.439m

The close approaches are at the ends of the deformation. Maximum separations at the center of the opening:

Casing: 0.278m
Coil: 0.478m

I think this is the model we want.
"Aqaba! By Land!" T. E. Lawrence

R. Peters

icarus
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Postby icarus » Wed Dec 01, 2010 12:56 am


happyjack27
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Postby happyjack27 » Wed Dec 01, 2010 1:53 am


rjaypeters
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Postby rjaypeters » Wed Dec 01, 2010 12:02 pm

Last edited by rjaypeters on Fri Dec 03, 2010 9:57 pm, edited 1 time in total.
"Aqaba! By Land!" T. E. Lawrence

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