Search found 825 matches

by drmike
Fri May 06, 2011 12:55 pm
Forum: News
Topic: 10KW LENR Demonstrator?
Replies: 3678
Views: 468943

I posted the following question on his blog two days back. It appears to have been rejected by the moderator. [...] Chris Bradley Your comment is awaiting moderation. May 4th, 2011 at 6:00 PM Why do you not run a ‘null’ test before your demonstrations – for example, i) why do you not heat the syste...
by drmike
Thu May 05, 2011 7:39 pm
Forum: News
Topic: 10KW LENR Demonstrator?
Replies: 3678
Views: 468943

It's most likely not real. I've been following via friends in Italy and there are too many holes. Here's a good site which lists many of the possible scams: http://lenr.qumbu.com/ Many are still possible. The key here is the physics is not patentable. If they have new physics, there is no reason to ...
by drmike
Sat Sep 12, 2009 5:33 pm
Forum: News
Topic: EMC2 Gets $8 million
Replies: 98
Views: 22586

Congrats to Rick and team! Good luck getting all the work in the proposal done on time. Should be a fun project.
by drmike
Fri Sep 11, 2009 10:05 pm
Forum: Theory
Topic: HPC modeling
Replies: 2
Views: 1347

HPC modeling

I ran across this by accident today: arxiv.org/pdf/0908.4362 "The performance results show that CUDA is an attractive parallel computing environment for MHD simulations." This is similar to the theory we need to model for Polywell, and can be taken as proof of principle. I also priced a 4 ...
by drmike
Fri Jul 24, 2009 3:26 am
Forum: News
Topic: Amateur fusioneers.
Replies: 12
Views: 3215

Early bombs were called fission-fusion-fission bombs, because they worked that way. The U-238 wasn't transmuted, it was directly fissioned by the different kind of neutron put out by the fusion reaction--I can't remember how exactly all that worked. modern "clean" weapons place a greater ...
by drmike
Sun Jun 28, 2009 1:29 pm
Forum: Theory
Topic: Virtual Polywell
Replies: 468
Views: 79983

I'll have to get that from work - at home I don't have xcell. If it's direct numerical integration, should be fine. The problem with blowing things up is that it takes time to replace the parts. :D I mostly have to deal with life this summer, so it will be a long time before I can really have some f...
by drmike
Tue Jun 23, 2009 11:47 pm
Forum: Theory
Topic: Virtual Polywell
Replies: 468
Views: 79983

A little over a year ago Tombo asked about a straight wire configuration, and I posted some math that figured out the field for it. I had the opportunity to actually use that in my day job, and what I found was that my starting point was slightly wrong, so that while I got the units right, I had don...
by drmike
Sat Jun 06, 2009 2:30 pm
Forum: Theory
Topic: Do Thermal Neutrons Irradiate Their Shielding Water?
Replies: 16
Views: 4456

On a submarine you use one heat exchanger to prevent radiation from getting into your turbines, on a normal plant you use two heat exchangers for safety. You can go direct and gain efficiency, but you lose big on the radiation damage to your turbines. The impurities in the water absorb the neutrons ...
by drmike
Mon May 18, 2009 12:58 pm
Forum: Design
Topic: Numerical Simulation of a Polywell
Replies: 41
Views: 13441

To accurately simulate is really difficult. Every model that does not follow 1e23 particles with 1e-12 second precision must have approximations - right now 1e15 flops is pretty darn good. We need 1e34 to simulate perfection, and that isn't going to happen in the next 20 years. There are many good m...
by drmike
Tue Feb 10, 2009 4:33 am
Forum: Theory
Topic: Recirculation revisited
Replies: 37
Views: 10822

Another view is to look at back emf. Every time you try to push current against a field, the field pushes back on the current. In a plasma, you can do that to the point where all the current is on the surface and all the field is on the surface too. The plasma inside doesn't see any external field b...
by drmike
Fri Jan 30, 2009 1:23 am
Forum: Awareness
Topic: Polywell@home?
Replies: 2
Views: 2982

Yes, we discussed that a while back. It's a great idea, but we first need to know which model to use. The Vlasov solver is a choice, but it is not the only one. In a sense it is a chicken and egg problem - without some real data, we don't know which model makes the most sense, and without a bunch of...
by drmike
Fri Jan 30, 2009 1:13 am
Forum: Theory
Topic: Vlasov Solver [work in progress]
Replies: 86
Views: 19790

And if you really want to go nuts, check out the Journal of Geometry and Physics.

Clifford Algebras and Manifolds are also good things to look into. N dimensional spaces seem complicated, but they tie a lot of complexity together for better understanding overall.
by drmike
Sun Jan 25, 2009 11:59 pm
Forum: Theory
Topic: Vlasov Solver [work in progress]
Replies: 86
Views: 19790

Thanks for the pointer to the quaternian paper. There's a typo in equation 14. The + in front of the v/c^2 should be a - (and that is consistent with the rest of that section). The end of section 3 is kind of dubious to me. The authors use the same vector potential to represent two different things,...
by drmike
Sun Jan 25, 2009 11:30 pm
Forum: News
Topic: Open Science Journals - Physics
Replies: 2
Views: 1800

Thanks! I don't have much time these days to play with my own toys, but in a few weeks
I hope that lets up and I can dive into this stuff again. That's a great find!
by drmike
Sat Jan 10, 2009 2:02 pm
Forum: General
Topic: Media "Control" of the Elections?
Replies: 328
Views: 35491

Speaking of communism and psychology - I always think of "red" as "communist". So when I see republicans in red I just assume they are
communists!! It's really dumb because obviously they are fascists.
:wink:

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