Search found 794 matches

by Art Carlson
Wed Dec 09, 2009 9:17 pm
Forum: News
Topic: Polywell In Europe Raising Funds
Replies: 143
Views: 18333

Heck yes! Then I would want you to say, "thank God the Polywell isn't a shpherical magnet confinement system for electrons!" The confinement system is the positive grid. The magnets just protect the grid; oh, and improve the grid confinement a thousand(?) fold. :D That may what you'd want me to say...
by Art Carlson
Wed Dec 09, 2009 9:15 pm
Forum: News
Topic: Polywell In Europe Raising Funds
Replies: 143
Views: 18333

A slowly outward moving ion at the edge of the wiffleball sees only a point negative charge at the centre of the well, decelerates and accelerates back towards it. If you had done the homework assignment, you would know that it is not sufficient to consider only the interaction of the ions with the...
by Art Carlson
Wed Dec 09, 2009 9:11 pm
Forum: News
Topic: Polywell In Europe Raising Funds
Replies: 143
Views: 18333

Of course, the problem with an electric field that turns back the electrons is that it would pull out any ions that are there. I haven't seen anyone try to quantify the competing electric forces at the edge of the well (negatively charged plasma ball wants to push electrons out the cusps, electrons...
by Art Carlson
Wed Dec 09, 2009 5:45 pm
Forum: News
Topic: Polywell In Europe Raising Funds
Replies: 143
Views: 18333

calculate how far out an electron escaping through a cusp will travel before it is turned around to reenter another cusp. Judging from the WB7 photo, the corner cusps are essentially closed by the box-corner reflection mechanism that kcdodd's simulation revealed. The electrons leaving the central c...
by Art Carlson
Wed Dec 09, 2009 5:31 pm
Forum: News
Topic: Polywell In Europe Raising Funds
Replies: 143
Views: 18333

By the by, Polywell isn't a spherical magnetic containment system for plasma. So you would be happy if we said "A spherical MAGNET cannot confine electrons without leaks"? Heck yes! Then I would want you to say, "thank God the Polywell isn't a shpherical magnet confinement system for electrons!" Th...
by Art Carlson
Wed Dec 09, 2009 1:09 pm
Forum: News
Topic: Polywell In Europe Raising Funds
Replies: 143
Views: 18333

I thought the point of the polywell was the the leaks would not equal total losses. To the stay with the bucket analogy, you would have a small hose attached to one "hole" and it would lead the losses back into the bucket through another "hole". That is at least what I understand. Homework: Assumin...
by Art Carlson
Wed Dec 09, 2009 9:11 am
Forum: News
Topic: Polywell In Europe Raising Funds
Replies: 143
Views: 18333

Just a note about toroidal/spherical confinement. A sphere cannot confine plasma without leaks. Well, the sun leaks, so I guess you are right, but I suspect you meant that a "spherical MAGNET" can't confine plasma... By the by, Polywell isn't a spherical magnetic containment system for plasma. So y...
by Art Carlson
Mon Dec 07, 2009 5:27 pm
Forum: News
Topic: Handheld Fusion Reactors
Replies: 22
Views: 11172

Even if you can make a 0.5 MeV ion beam, and even if you can make it with 100% energy efficiency, when it slams into a solid target it will unavoidably lose more energy by heating the electrons in the solid than it will produce by fusion. This is true for D-T and it is 1000 times more true for p-B1...
by Art Carlson
Mon Dec 07, 2009 5:13 pm
Forum: Theory
Topic: Probability of gamma-emitting branch of p+11B...
Replies: 12
Views: 4048

...W. Kernbichler, R. Feldbacher, M. Heindler. "Parametric Analysis of p-11B as Advanced Reactor Fuel" Hi Art, theres much mention there of impracticaly low Q values for pB11. Can I ask, what are the theoretical reasons behind this? I haven't looked at this paper for many years. Maybe I'll get a ch...
by Art Carlson
Sun Dec 06, 2009 10:42 pm
Forum: Theory
Topic: Probability of gamma-emitting branch of p+11B...
Replies: 12
Views: 4048

I have previously pondered on this potential myself, but no such reaction appears on NNDC database, which tends to support my doubt that such a reaction occurs/is as common as this. I would presume it is an erroneous wiki-edit by someone that has made a guess at it, until such time as I see a refer...
by Art Carlson
Sun Dec 06, 2009 9:17 pm
Forum: Theory
Topic: Probability of gamma-emitting branch of p+11B...
Replies: 12
Views: 4048

Nuclear physics is not my strong suit, but I believe the first step in the p-B11 fusion process is always the formation of C12*. When it's got several MeV of energy to get rid of, it won't care whether it has a tenth of an MeV more or less from the energy of the reactants. The branching ratio is pro...
by Art Carlson
Sun Dec 06, 2009 2:12 pm
Forum: News
Topic: Handheld Fusion Reactors
Replies: 22
Views: 11172

Pretty high goal then, I guess. It's cobblers. I guess, put enough project proposals in and eventually it gets signed off by someone who doesn't know the basics. Sorry, condescending to be sure, but beam into solid target is nonsense, for fusion power. Imagine if the applicants had put (genuinely) ...
by Art Carlson
Sat Dec 05, 2009 4:17 pm
Forum: News
Topic: Polywell In Europe Raising Funds
Replies: 143
Views: 18333

Assuming that the power density advantage (~60,000) is anywhere close, ... Remind me again where this number comes from. I would have said, given the same fuel, and the same magnetic field strength, the power density scales with beta^2. Taking the beta of a tokamak reactor to be 10% (I think it is ...
by Art Carlson
Sat Dec 05, 2009 2:55 pm
Forum: News
Topic: wired and nextbigfuture Oct 25 and 26
Replies: 63
Views: 26687

I did some digging and I found this: http://trilogynet.net/Thomas_Gold/depth.html Molecules that are composed of four or more atoms may possess chirality, meaning that the same arrangements of the positions of the components of the molecule can be achieved in two different ways, one being the preci...
by Art Carlson
Sat Dec 05, 2009 2:09 pm
Forum: Theory
Topic: The end of the world? Or the end of fossil fuels?
Replies: 15
Views: 5017

Polywell approach: Dig a large hole at the middle of the stadium, drop ping pong balls in there. Sooner or later they'll smash, right? Except it's not in a stadium, it's at the beach. As soon as you dig the hole, the sand starts flowing in again. The ping pong balls have to smash before the hole fi...