Search found 1439 matches
- Wed Oct 13, 2010 6:57 pm
- Forum: Theory
- Topic: Could Polywell research enable Farnsworth-Hirsch fusors?
- Replies: 22
- Views: 12168
Well, all I can say is that both plasma electrodes, needle electrodes and single loop electrodes have all been tried by amateurs, and they are all much of a muchness. If the grid made that much difference, then wouldn't you think you'd see differences in such experiments?... no. i wouldn't. you sti...
- Wed Oct 13, 2010 6:38 pm
- Forum: Theory
- Topic: Could Polywell research enable Farnsworth-Hirsch fusors?
- Replies: 22
- Views: 12168
i agree that loss to thermalization is big. but i think there's a calculus nuance one must consider in charged particle loss to grid. the rate (dx) of loss to grid is going to be proportional to the density of particles around the grid (x). something like dx = Cx (that's a _partial_ derivative, of c...
- Wed Oct 13, 2010 5:53 pm
- Forum: Theory
- Topic: Could Polywell research enable Farnsworth-Hirsch fusors?
- Replies: 22
- Views: 12168
in a way, a polywell IS a fusor with a magnetically shielded cathode. the magrid is the cathode. it has a bias voltage with reference to the plasma and the outside walls, and it's electromagnetically shielded. the only way to have a fully magnetically shielded cathode is to use electromagnetics (cau...
- Mon Oct 11, 2010 10:37 pm
- Forum: Theory
- Topic: magrid configuration brainstorming
- Replies: 632
- Views: 269092
here's an interesting configuration. probably leaky as all hell, though. i filled in the plane of the magnet so you can see the orientation and relations better, and i drew a line coming out showing north. there are actually two topologically distinct configurations. flip the poles of any pair of op...
- Mon Oct 11, 2010 8:10 pm
- Forum: Theory
- Topic: magrid configuration brainstorming
- Replies: 632
- Views: 269092
- Mon Oct 11, 2010 6:29 pm
- Forum: Theory
- Topic: Near Spherical Magrid
- Replies: 217
- Views: 85609
Why do you need vacuum to test various magrid configurations? The magnetic permeability of air is so close to vacuum, that one would think if all you're going to do is test configs, and not run fusion experiments (or is this required to "test configurations"), that you could do without all the pain...
- Mon Oct 11, 2010 5:48 pm
- Forum: Theory
- Topic: magrid configuration brainstorming
- Replies: 632
- Views: 269092
looks like tombo beat me to the punch on the single-coil symmetric designs. (page 5) regard plugging the cusps, i'm not sure you undertand what i meant. you can plug the cusps without prohibiting recirculation. i mean by using coils orientated like in hanelyp's design on page 1. i.e. where the plane...
- Mon Oct 11, 2010 5:09 pm
- Forum: News
- Topic: Small update from Lawrenceville Plasma Physics
- Replies: 131
- Views: 57307
- Mon Oct 11, 2010 5:00 pm
- Forum: Theory
- Topic: magrid configuration brainstorming
- Replies: 632
- Views: 269092
- Mon Oct 11, 2010 12:22 am
- Forum: Theory
- Topic: magrid configuration brainstorming
- Replies: 632
- Views: 269092
i've been kicking this idea around in my head for a while, i suppose i might as well make it explicit: why don't you just plug up the cusps with another magnetic field? e.g. just put another coil outside the cusp, tangent to the 2nd normal of the escaping field line(s). it might not plug it up exact...
- Sun Oct 10, 2010 2:11 pm
- Forum: Theory
- Topic: POPS iec fusion
- Replies: 25
- Views: 12110
The problem with modulating the magnetic fields , if it did work on the time scales needed is that this would defeat at least some of the purpose of the superconductor - has to be constant if you want to minimize input magnet drive power. A supplemental copper wire magnet might get the job done. Bu...
- Fri Oct 08, 2010 8:29 pm
- Forum: Theory
- Topic: magrid configuration brainstorming
- Replies: 632
- Views: 269092
problem w/the embedded baseball seam design is that the implied polyhedral geometry is that of a cubed, which has an odd number of faces at each vertex. starting w/ the octohedron configuration, w/out (or in) facing magnets removed (i.e. 4 real coils), connecting adjacent pairs of coils so you have ...
- Fri Oct 08, 2010 5:09 pm
- Forum: Theory
- Topic: magrid configuration brainstorming
- Replies: 632
- Views: 269092
possibly by adding terms to the equations shown here: http://www.darenscotwilson.com/spec/bbseam/bbseam.html or put 3 baseball seem curved coils inside each, rotated so that their line cusps are orthogonal to each other. it would certainly be interesting to see what these magnetic fields look line. ...
- Fri Oct 08, 2010 4:37 pm
- Forum: Theory
- Topic: magrid configuration brainstorming
- Replies: 632
- Views: 269092
- Thu Oct 07, 2010 1:58 pm
- Forum: General
- Topic: Are we taking supercomputing code seriously?
- Replies: 27
- Views: 7643