Search found 154 matches

by Stoney3K
Tue Jan 04, 2011 6:51 pm
Forum: Theory
Topic: "Time to Fusion", "Ion-Ion Collision Time&quo
Replies: 26
Views: 10409

I wounder if it could be applied to a cylindrical, or by extension, a toroidal geometry? You could always propose the idea at JET or IGNITOR to give it a shot. It would be pretty cool to hear that one of those beat the break-even point before their bigger ITER sister fires first plasma. ;) "Sorry g...
by Stoney3K
Tue Jan 04, 2011 12:49 pm
Forum: Theory
Topic: What IS the current in a superconductor measured as?
Replies: 40
Views: 14429

...most of the issues in the "technical challenges" section seem to stem from the maximum current issue. (e.g. anything mentioning a 100 mile coil) Most of the issues also focus on utility storage of energy, not for movable applications. I hope you can imagine that a 100 mile coil buried undergroun...
by Stoney3K
Mon Jan 03, 2011 2:14 pm
Forum: Theory
Topic: What IS the current in a superconductor measured as?
Replies: 40
Views: 14429

If you trust wikipedia: http://en.wikipedia.org/wiki/SMES They are very efficient, up to 95% energy out/energy in, but also expensive. I guess the main losses (and cost) are being caused by the cryogenic system needed to keep the SC coil at temperature. Get that out of the loop (something not infea...
by Stoney3K
Mon Jan 03, 2011 12:17 pm
Forum: Theory
Topic: What IS the current in a superconductor measured as?
Replies: 40
Views: 14429

the term is layman (from brick layer? not sure of the etymology.) but layman's terms are usually thought to be an oversimplification, and on the contrary that is an excellent analogy! that is _exactly_ how it is, and a much better description than _i_ did! What can I say, I watched a lot of Stargat...
by Stoney3K
Sun Jan 02, 2011 11:27 pm
Forum: Theory
Topic: What IS the current in a superconductor measured as?
Replies: 40
Views: 14429

ah yes, on the point of magnetic fields, inductance and what not tend to work towards opposing changes in the magnetic field. so it would take work to create the field, and the it would take work to destroy it (or you could simply take out out of superconducting mode), and more generally it would t...
by Stoney3K
Sat Dec 11, 2010 3:01 am
Forum: General
Topic: Go Navy!
Replies: 325
Views: 129332

It seems the Navy is pushing some radical new techs on their ships. Not a bad thing, if you look at what's being developed, the new generation of warships is going to be completely electrified. Powered from a Polywell, free electron lasers for missile defense and close range capabilities, and railgu...
by Stoney3K
Wed Dec 01, 2010 4:35 pm
Forum: General
Topic: Speed Limit
Replies: 20
Views: 4643

Stoney, I suggest you study up on relativity theory, and a bit of calculus. gamma = 1/sqrt(1-V^2/C^2) energy = gamma*M0*C^2 momentum = gamma*M0*V at light speed gamma = 1/0 = infinity, which with a little calculus reduction with 0 mass gives a finite non zero energy and momentum. True, that was the...
by Stoney3K
Tue Nov 30, 2010 10:57 am
Forum: General
Topic: Speed Limit
Replies: 20
Views: 4643

[So I guess the next question is to understand why/whether you think those 'maximum speeds' (relative to lab-frame, of course) will be the same for two runs in the same accelerator for two beam currents of different intensity. As far as I understand special relativity, they are not: If a particle b...
by Stoney3K
Sun Nov 28, 2010 6:06 pm
Forum: News
Topic: Room-temperature superconductivity?
Replies: 1893
Views: 370532

I can assure you that to continue to underestimate the Chinese industrial skills shall be the Western world's undoing in the early part of the 21st century. (...) But they learn, boy do those guys learn! They make me think of the US in the 60's - a real 'have a go' spirit, not afraid of making thei...
by Stoney3K
Sun Nov 28, 2010 4:51 pm
Forum: General
Topic: Free Electron laser In The news Again
Replies: 8
Views: 3483

Imagine one of these mounted on board of a ship powered by a Polywell.

If we only had photon torpedoes and a sticker marked 'ENTERPRISE', we'd be in the ballpark. :mrgreen:
by Stoney3K
Wed Nov 10, 2010 12:44 pm
Forum: General
Topic: Black Hole Starships
Replies: 4
Views: 1376

Isn't that one of the major problems we've been having with spaceflight over the last century? Everything is based on heat engines, prime movers, and Newton's Third Law. Chuck something out the back, and you get an equally-sized push forward. Chuck something down a pipe, and the little paddlewheel i...
by Stoney3K
Fri Oct 29, 2010 6:36 pm
Forum: News
Topic: Joe Eck reports superconductivity near 267K (-6C, 21F)
Replies: 8
Views: 3378

Tom Ligon wrote:Superconductors are neat, but if you can't make an electromagnet out of them they're not nearly so useful.
You mean like this?

http://prometheusfusionperfection.com/2 ... t-success/

Yep, that guy should be on these boards somewhere too.
by Stoney3K
Fri Oct 29, 2010 10:52 am
Forum: News
Topic: fusion from porn
Replies: 9
Views: 3001

I like to think that this man has harnessed one of our primal urges and converted into money, and again into progress. And frankly, I don't see anything wrong with that. Don't forget that the adult entertainment industry is huge (especially on the internet), and using such an industry as seed money...
by Stoney3K
Fri Oct 29, 2010 10:39 am
Forum: News
Topic: Joe Eck reports superconductivity near 267K (-6C, 21F)
Replies: 8
Views: 3378

Re: Joe Eck reports superconductivity near 267K (-6C, 21F)

http://www.superconductors.org/265K.htm I hope we can get things like this done reliably. Temperatures down to -18C (255K) can be achieved with standard refrigeration gear, like your home freezer, and need only simple working fluids to transport the coolants to the business end of your SC. Not exac...
by Stoney3K
Wed Oct 27, 2010 11:55 am
Forum: Design
Topic: Time to build an electron injector by myself
Replies: 37
Views: 16684

For illumination the filament needs to be run white HOT. For electron injection I suspect you could run the filament only red hot, for a much longer life. In either case the expected filament life would greatly exceed the run time for an experiment. I worked with ion laser tubes (Spectra-Physics) a...