Talk-Polywell.org

One thing is that you will still have an infinite electric potential (and field) at the surface of the coil. Doing it the way I described will result in a finite and easily changed (but not quite constant) potential and field at the surface. (That way you could set the (average) potential on the gri...

...but in any case the idea for the surface is i just subtract "r" from the distance, so each line segment becomes, approximately, a cylinder with a hemisphere cap on each end. that gives you an extra sphere of charge at the intersections, though. but if one really wanted they could just put a poin...

So, between conduction and the small differences between charge inside and outside, is there any noticable induction induced charge seperation on the magrid metal surfaces? Dan Tibbets No, I don't think there will be much either, on a real polywell with conducting casings. I was talking about the s...

Perhaps I'm confused, but I don't follow your reasoning... Seems like we're talking past each other. I was just commenting that the charge on the grid looked like it was quite far from a realistic polywell and wondered why it still didn't show any recirculation of the electrons. The simulation I'm ...

total. so divide by 14336 to get per particle. also, i am using SI units, but the magrid charge is in coloumbs per square meter (surface area), or in the case of 0 thickness coils coloumbs per linear meter. and the slider for that one i haven't checked to see if i'm multilying it to the right const...

Your math/ assumptions are not right. Perhaps you are assuming a population of ~ 10^22 electrons/ M^3 in the Wiffleball and the associated coulomb repulsion (which would be huge)... I didn't consider any particle-particle interactions, just the grid. The question was if he was using SI units, i.e. ...

OK, that was what I thought. I've looked trough your recent videos of the "Escape from Coruscant"-sims and I haven't really seen any recirculation, just as you said. Once the electrons are outside they don't seem to be affected much by the grid which makes me wonder: Is this true as you zoom out, ar...

@happyjack27 Are you modelling the chamber as a simple loss radius? Just make sure to remember that the electric potential at the chamber is nonzero (and also different at different positions). I checked the 1m radius dodec - the potential at 2m is about half of that in the center of the grid and at...

from what i can tell from my sims: 1. w/an uncharged grid... I don't exactly remember what you said was the problem with the charge on the wires but I took a look at your static e-field code. The equation you're using seems right but I don't know if you implemented it correctly due to the lateish h...

Lets see if I can answer this for you. The Lorentz force equation is: Lorenz Force = charge*[E field + (velocity x Magnetic field)] I don't know what the other formula would be. It looks somewhat like the E-cross-B drift velocity, v=(E x B)/B^2, which is derived using the Lorentz force and the equat...

I think you forgot to take the inverse square of c - could be important :) My guess is this (using the standard SI units): RC2=1/(3 * 10^8 [m/s])^2 ~ 1.1 * 10^-17 [s^2/m^2] 1/E_TO_C=1/(1.6 * 10^-19 [C=As]) ~ 6.24 * 10^18 [1/As] This gives: ((RC2/E_TO_C)*0.002*0.00000000025) ~ 1.1 * 10^-17 * 6.24 * 1...

Me bad - GL_LINES it will plot each pair of points as separate line segments; GL_LINE_STRIP will plot one line through each point in order, not the other way around :oops: I'll correct it. See for example http://fly.cc.fer.hr/~unreal/theredbook/ One can make the lines fatter with 'glLineWidth(width)...

That sounds better, you'd need the capacitance of a thin finite wire (try wikipedia) or a torus. But you'll get problems if you want a zero radius... By the way: In case you haven't had any hints on how to draw the magrid. I've had a (very brief) introduction to openGL in a course I'm taking. Try in...

Hi everyone. I've been lurking on the forum for quite some time, but this is my first post so please be patient if i say something stupid or make a mess of the formating :) in the meantime, can anyone tell me: given two sense points which tells me the electric charge at those point, in coloumbs -- g...