Search found 334 matches

by tombo
Tue Mar 09, 2010 10:31 pm
Forum: News
Topic: New Scientist mentions Fusion-Fission hybrids
Replies: 20
Views: 3406

The problem I have with Thorium reactors is that the U232 (?) is fissile bomb material. It can be separated chemically, ie relatively easily. But, it only lasts a few weeks, which is a show stopper for someone sane who only holds these things for deterrence and would like to keep them ready for deca...
by tombo
Tue Mar 09, 2010 12:17 am
Forum: Design
Topic: 2D WB-7 B-filed simulation
Replies: 49
Views: 20212

Slicing my B field in the plane being discussed shows a result much like Indrek's. You are looking at 7 layers of B field vectors. The pink shows the coils. The blue cones are B vectors. The wiffle ball center is in the lower left quadrant. http://i299.photobucket.com/albums/mm317/tombo1234/TrunCube...
by tombo
Mon Mar 08, 2010 6:46 pm
Forum: News
Topic: Thermopower waves
Replies: 4
Views: 1543

With the right absorbing additions a photon of say bremstrahlung or IR could create a pulse like a splash.
It would not be ongoing but could well travel the length of the tube like a soliton.
I'm just speculating here. It says it is not very efficient yet.
by tombo
Sat Mar 06, 2010 10:15 pm
Forum: Design
Topic: 2D WB-7 B-filed simulation
Replies: 49
Views: 20212

I believe the field lines close through the triangular truncated corner of the cube, which is out of the plane of the picture. I see two "stagnation points" where the fields seem to cancel (dark blue). Gyro radius will go very large in those areas. It would be interesting to see how far those region...
by tombo
Mon Mar 01, 2010 6:29 am
Forum: Design
Topic: Different polyhedra require different strength magnets
Replies: 158
Views: 38306

Nubs: I would sure like to know if nubs on the machine at EMC2 are evenly hot all the way around their circumferences or if they have hot spots. (say toward the north and south poles) If most of the heat load is on 2 opposite sides then they could be narrower facing that direction and longer the oth...
by tombo
Mon Mar 01, 2010 6:21 am
Forum: Design
Topic: Different polyhedra require different strength magnets
Replies: 158
Views: 38306

The 8" OD of the coil includes layers of cooling and insulation. The actual SC cross section is more like 3-4" IIRC from a previous discussion of coil sizing. They do not have just one SC wire. They have as many SC wires as you would have turns. It is similar to the MPG. advantages: 1 Feed lines hav...
by tombo
Mon Mar 01, 2010 3:17 am
Forum: Design
Topic: Different polyhedra require different strength magnets
Replies: 158
Views: 38306

http://i299.photobucket.com/albums/mm317/tombo1234/TrunDodec/TrunDodecB.jpg http://i299.photobucket.com/albums/mm317/tombo1234/TrunDodec/TrunDodecA.jpg http://i299.photobucket.com/albums/mm317/tombo1234/TrunDodec/TrunDodecC.jpg http://i299.photobucket.com/albums/mm317/tombo1234/TrunDodec/TrunDodecD...
by tombo
Mon Feb 22, 2010 12:37 am
Forum: Design
Topic: Different polyhedra require different strength magnets
Replies: 158
Views: 38306

All standoffs should have full current so they are magnetically shielded. It is not just Amps that count. It is Amp - Turns. Yes, of course. To be more precise, the standoffs should have enough current to create a high enough B field at their surfaces to magnetically shield them from the (hopefully...
by tombo
Mon Feb 22, 2010 12:22 am
Forum: Design
Topic: Different polyhedra require different strength magnets
Replies: 158
Views: 38306

The funny cusps are a result of the LOCAL current geometry. They reside between conductors with oppositely directed currents where those currents come closest together. Actually, this is the definition of the line-like cusp that the WB6 generates in lieu of the funny cusp of the patented design. I ...
by tombo
Sun Feb 21, 2010 11:27 pm
Forum: Design
Topic: Different polyhedra require different strength magnets
Replies: 158
Views: 38306

Ok, here is what I am thinking: dodecahedron topology 1 m toroid coils run at 10 T (20 - 25 cm coil thickness, 60 - 50 cm bore, which exceeds msimon's minimum bore of 10 radii from alpha radiation cooling point of view). inside dodecahedron diameter about 2 m (assumes 6 -8 radii gap between adjacen...
by tombo
Sun Feb 21, 2010 9:42 pm
Forum: News
Topic: Polywell FOIA
Replies: 475
Views: 109031

... But every mech, and quantifiable numbers reached counts, as long as it is "me" (The FOIA requestor) doing it. ... Do you have to personally do it? (every keystroke? and every mile of carying newspapers?) Can't you hire someone to do some of the work? No one can reach a large audience without hi...
by tombo
Tue Feb 16, 2010 5:12 am
Forum: General
Topic: laser shoots down scud?
Replies: 14
Views: 2050

Actually 100 miles horizontally has a lot more air molecules in the way than 100 miles straight down.
So the range is in the ballpark.
by tombo
Tue Feb 16, 2010 4:47 am
Forum: Design
Topic: Different polyhedra require different strength magnets
Replies: 158
Views: 38306

The funny cusps are a result of the LOCAL current geometry. They reside between conductors with oppositely directed currents where those currents come closest together. Look at the point at the center of the equatorial segment (center of a set of 4 segments actually). Let's call than 45deg West. The...
by tombo
Mon Feb 15, 2010 8:02 pm
Forum: Design
Topic: Different polyhedra require different strength magnets
Replies: 158
Views: 38306

...if it weren't for that equatorial member that cuts right through the center of the three equatorial funny-cusps. I don't think they do. I think they go between pairs of funny cusps. Look at the current directions and field directions. They have to be there to separate the areas of alternating B ...
by tombo
Mon Feb 15, 2010 8:36 am
Forum: Design
Topic: Different polyhedra require different strength magnets
Replies: 158
Views: 38306

I drew something similar in a very long winded post on May 30 2008: http://www.talk-polywell.org/bb/viewtopic.php?t=289&postdays=0&postorder=asc&highlight=magrid+config&start=60 It is based on an octahedron. http://i299.photobucket.com/albums/mm317/tombo1234/PolywellC-8x4-hedron4Circuit-1.jpg Here i...