Lockheed Martin news

Point out news stories, on the net or in mainstream media, related to polywell fusion.

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happyjack27
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Re: Lockheed Martin news

Postby happyjack27 » Thu Dec 15, 2016 12:55 am

I erred when I said "constant force". The force is the arithmetic difference in voltage per distance. Whereas the voltage drops off geometrically. Nonetheless, it would still "oscillate/orbit" since all you need for that is a central force dependant only on absolute distance from the center.

The recirculation will certainly interferes with the beam, quite possibly a lot given the number of recirculations. However, the forces, at least, are additive. So an improved focused is still an improved focus, regardless of intervening factors.

I don't suspect much difference between face vs corner, except that faces would be more stable, as a single spin about the axis on a corner exposes you to more extreme forces.

I'm reminded of "Shannon entropy" being maximized when the probability distribution is "flat". I suspect the same applies here (except minimized) - a circular cusp of a given radius provides less destabilization than a square one with the same average radius, all else being equal.

happyjack27
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Re: Lockheed Martin news

Postby happyjack27 » Thu Dec 15, 2016 1:16 am

This is all premises on the idea that - in terms of KE, at least - you can collimate ions better than electrons.

If this is false, it might not be worth it

D Tibbets
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Re: Lockheed Martin news

Postby D Tibbets » Thu Dec 15, 2016 2:13 am

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

happyjack27
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Re: Lockheed Martin news

Postby happyjack27 » Thu Dec 15, 2016 2:24 am

Last edited by happyjack27 on Thu Dec 15, 2016 2:30 am, edited 3 times in total.

mvanwink5
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Re: Lockheed Martin news

Postby mvanwink5 » Thu Dec 15, 2016 2:25 am

I don't know how high energy neutral beams are being made, but clearly, the method has been proven and Tri Alpha is planning to pump in megawatts of power into their plasma in C2U with these beams. Why reinvent the wheel? Why debate it? Find out how it is being done is my suggestion.
Near term, cheap, dark horse fusion hits the air waves, GF - TED, LM - Announcement. The race is on.

happyjack27
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Re: Lockheed Martin news

Postby happyjack27 » Thu Dec 15, 2016 2:43 am


D Tibbets
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Re: Lockheed Martin news

Postby D Tibbets » Sat Dec 17, 2016 1:17 am

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

happyjack27
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Re: Lockheed Martin news

Postby happyjack27 » Sat Dec 17, 2016 2:09 am


Skipjack
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Re: Lockheed Martin news

Postby Skipjack » Wed Mar 15, 2017 5:54 am

I have not seen this posted yet, but might have simply missed it. It is an analysis of the Lockheed Martin reactor concept. I am honestly a bit at a loss:

NotAPhysicist
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Re: Lockheed Martin news

Postby NotAPhysicist » Wed Mar 15, 2017 12:36 pm

That's a great find, thank you :)
Certainly sounds positive at Lockheed and would also seem to highlight how unfortunate it is that the Polywell concept hasn't been better funded.
Getting there I suppose.

crowberry
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Re: Lockheed Martin news

Postby crowberry » Wed Mar 15, 2017 3:34 pm


Skipjack
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Re: Lockheed Martin news

Postby Skipjack » Wed Mar 15, 2017 6:58 pm

Oh Ok, I don't look into those forums as often.

hanelyp
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Re: Lockheed Martin news

Postby hanelyp » Wed Mar 15, 2017 7:03 pm

The daylight is uncomfortably bright for eyes so long in the dark.

Skipjack
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Re: Lockheed Martin news

Postby Skipjack » Wed Mar 15, 2017 7:31 pm


D Tibbets
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Re: Lockheed Martin news

Postby D Tibbets » Thu Mar 16, 2017 12:52 am

5 milliseconds or more may be very significant, or not. For a Polywell operating at a density of 10^22 /M^3 it is impressive. But, I don't know at what density the Tri Alpha current efforts are working at. It is that old triple product consideration. Low Beta Tokamaks may manage 100s of seconds, but because of the lower density, the triple product is still a challenging goal.

I understand reverse field configurations may reach densities similar to Polywell goals, but I don't know how this relates to their current research, nor how confident they are of scaling projections for either density or temperature .9the other two legs of the triple product).

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


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