Search found 722 matches
- Sun Jul 13, 2008 8:14 pm
- Forum: Theory
- Topic: Electron Temperature
- Replies: 5
- Views: 4233
The boltzmann distribution determines the spread of energy of particles at a single temperature. Even though you have one temperature in a system at thermal equilibrium, the individual particles have a statistical spread of energy. This is bad when the thing keeping all the electrons in the chamber ...
- Sun Jul 13, 2008 7:23 am
- Forum: Design
- Topic: Undergrad polywell research?
- Replies: 7
- Views: 4415
Actually, at low beta I think its just the opposite. The face point cusps are at low field values, so most of the loss would be there. The line and corner cusps have high field strength because they are very close together. I am not saying you will be able to beat the open core design but for an und...
- Sat Jul 12, 2008 6:41 pm
- Forum: Theory
- Topic: Vlasov Solver [work in progress]
- Replies: 86
- Views: 51800
Well,my biggest problems I think are coming from the fact that I don't know 6 dimensional geometry and I can't even really "see" what it's doing. I'm a very visual person I've just tried to piece together what I think it should/is doing. I have thought about rewriting the program work in lower numbe...
- Sat Jul 12, 2008 8:05 am
- Forum: Theory
- Topic: The Successor to Polywell - Solving Poincaré the Right Way
- Replies: 24
- Views: 15879
- Sat Jul 12, 2008 4:35 am
- Forum: Theory
- Topic: Vlasov Solver [work in progress]
- Replies: 86
- Views: 51800
- Fri Jul 11, 2008 6:02 pm
- Forum: Theory
- Topic: Vlasov Solver [work in progress]
- Replies: 86
- Views: 51800
Well, I am having lots of problems. I'm sorry I can't post more positive thing, heh. My discretization algorithm seems to hang up at certain configurations, and the integration of density from phase space to position space doesn't seem to be working correctly. In this picture the density is supposed...
- Fri Jul 11, 2008 5:29 pm
- Forum: Theory
- Topic: Making Electricity with the p-B Polywell
- Replies: 134
- Views: 68849
TheRadicalModerate, you have it right. The alphas must be neutralized to get net current, and they must do it at high potential to get net energy, and so that means the collector has to be at high potential. If they are neutralized at low potential then no energy will be extracted electrostaticaly. ...
- Fri Jul 11, 2008 3:27 am
- Forum: Design
- Topic: Undergrad polywell research?
- Replies: 7
- Views: 4415
I think I have a way to build a polywel on a budget. Get one of those 6 port uhv crosses. And wrap each arm with magnet wire to the desired size. On the inside you fashion an electrode around the centre where the 6 pipes come in, making sure it has a low profile to allow electron flow through the ce...
- Fri Jul 11, 2008 2:16 am
- Forum: Theory
- Topic: Making Electricity with the p-B Polywell
- Replies: 134
- Views: 68849
Yes. In steady state the electric field between the decelerator and collector is unchanging, and the net charge an both grids remains constant. That's pretty much the definition of steady state. If the field around the decelerator grid is unchanging and no charge is actually being put there, then th...
- Thu Jul 10, 2008 5:21 am
- Forum: Theory
- Topic: Question about Polywell assembly in space
- Replies: 10
- Views: 6743
- Thu Jul 10, 2008 2:56 am
- Forum: Theory
- Topic: All that can go wrong with recirculation
- Replies: 112
- Views: 60133
I assume that is for the electron beam since it's outside. And I am assuming you are counting the length along parallel to the electron beam. If so doesn't that seem to say that all the reflection has to occur within 7cm of the magrid? On your earlier comment, its easy to make the confinement time s...
- Wed Jul 09, 2008 5:14 pm
- Forum: Theory
- Topic: Making Electricity with the p-B Polywell
- Replies: 134
- Views: 68849
- Wed Jul 09, 2008 3:23 pm
- Forum: Theory
- Topic: Making Electricity with the p-B Polywell
- Replies: 134
- Views: 68849
- Wed Jul 09, 2008 3:02 pm
- Forum: Theory
- Topic: Making Electricity with the p-B Polywell
- Replies: 134
- Views: 68849
MSimon, dude, for real. This is not "big bath". KE + PE = E, and PE = 2*e*V for alpha. alpha starts at 0V with 2MeV: 2MeV + 2*e*0V = 2MeV. we are assuming that there are no other collisions with particles before it is collected, so total energy of the alpha is conserved dE/dt = 0. to find the KE at ...
- Wed Jul 09, 2008 2:45 am
- Forum: Theory
- Topic: Making Electricity with the p-B Polywell
- Replies: 134
- Views: 68849
MSimon, why are you making the collector at 0v, that makes no sense if the alpha starts off at 0v. An alpha is not going to "drift" from 1MV to 0V, it will accelerate. Not only will the alphas have the same energy they started out with, you would never extract any useful energy. Even a billion amps ...