Search found 722 matches
- Tue Jun 24, 2008 5:46 am
- Forum: Theory
- Topic: What's Electron "pushback?"
- Replies: 13
- Views: 7453
One way of thinking about it is that even though you can ignore the paths where there is uniform density, when there is a gradient in density (ie the density changes along some direction) you have an imbalance of paths, so you can no longer ignore them. There is an effective overall current there wh...
- Mon Jun 23, 2008 7:16 pm
- Forum: Theory
- Topic: Vlasov Solver [work in progress]
- Replies: 86
- Views: 53376
- Mon Jun 23, 2008 2:44 am
- Forum: Theory
- Topic: What's Electron "pushback?"
- Replies: 13
- Views: 7453
A moving electron can be viewed as a tiny current element, just as if it were traveling in a wire. And of course currents produce magnetic fields. The path of an electron in an external magnetic field becomes curved, and the curvature of the path is always such that the magnetic field produced by th...
- Mon Jun 23, 2008 12:35 am
- Forum: Theory
- Topic: Vlasov Solver [work in progress]
- Replies: 86
- Views: 53376
As an update I have been doing debugging and continued making memory and speed optimization and I think its starting to get into a workable range. I need to come up with a file format to get the geometry and configuration into the simulation, and then output the results. I'm thinking of using vtk fo...
- Fri Jun 20, 2008 6:31 pm
- Forum: Theory
- Topic: Vlasov Solver [work in progress]
- Replies: 86
- Views: 53376
I'm not using matlab for this one. I'm doing it in c++ for more control in general. But I just dont want to worry about distribution and networking and all that, at least for now anyway. It may be possible to do it but that will wait till after I know if what I'm doing will even give good results. I...
- Thu Jun 19, 2008 10:41 pm
- Forum: Theory
- Topic: Vlasov Solver [work in progress]
- Replies: 86
- Views: 53376
- Thu Jun 19, 2008 8:56 pm
- Forum: Theory
- Topic: Vlasov Solver [work in progress]
- Replies: 86
- Views: 53376
I'm running win2k with 1gb memory and 2ghz processor. its a few years old computer, lol. I've already made some changes, I think one thing is there was some memory fragmentation going on but I think I fixed that. Its currently using like 150mb of memory for every 100k simplices, which would be like ...
- Thu Jun 19, 2008 7:43 am
- Forum: Theory
- Topic: Vlasov Solver [work in progress]
- Replies: 86
- Views: 53376
Vlasov Solver [work in progress]
I just thought I would post an update on the solver I am working on. Even with adaptive mesh it is being difficult to get the memory usage into a workable range. The actual solver code has been done since I posted my introduction in the general forum, but that was apparently the easy part :(. I'm ha...
- Thu Jun 19, 2008 6:07 am
- Forum: Theory
- Topic: Carlson and Nebel
- Replies: 108
- Views: 82397
I think the introduction of heavy elements would just knock all the light ones out of the reaction area. The velocity of a iron atom would not change much compared to hydrogen, or even boron. And considering it would be at several times the energy I would think the lighter elements would gain so muc...
- Mon Jun 16, 2008 7:15 pm
- Forum: Theory
- Topic: Of Line Cusps
- Replies: 39
- Views: 21602
- Mon Jun 16, 2008 5:02 am
- Forum: Theory
- Topic: Ion Trajectories Through the Wiffle-Field
- Replies: 18
- Views: 10155
The idea is to have ions trapped in well created by the electrons which means injecting them inside coil structure. You are right, if you inject them outside then their KE is greater then the well and they'll just fly right through the machine out the other side. edit: I'm sorry, I think I know what...
- Mon Jun 16, 2008 3:48 am
- Forum: Theory
- Topic: Of Line Cusps
- Replies: 39
- Views: 21602
- Sun Jun 15, 2008 10:09 pm
- Forum: Theory
- Topic: Of Line Cusps
- Replies: 39
- Views: 21602
I am curious how he came to the 2x the gyro-radius figure, and I'm a bit confused about what he means exactly. Because if the electrons are on an escape trajectory they must be traveling at nearly parallel to the B-field, which means their gyro-radius is basically zero, no matter what the energy or ...
- Fri Jun 13, 2008 8:53 pm
- Forum: Theory
- Topic: Of Line Cusps
- Replies: 39
- Views: 21602
My understanding of the wiffleball effect is it does not "close" any cusp at all. The very center of the device without any electrons in it has zero magnetic components since all the faces cancel each other. However, it is just a point in the center where this happens. Any movement off the zero poin...
- Mon Jun 09, 2008 4:58 pm
- Forum: General
- Topic: The Military Sucks
- Replies: 40
- Views: 19316
Don't I remember a history channel episode where the air force already built a nuclear powered jet back in the cold war? I think they piped liquid sodium coolant directly to the jet engines which ran off the heat of the reactor. Of course they had to have a lead lined cockpit and irradiated the air ...