Search found 1439 matches
- Wed May 18, 2022 3:47 pm
- Forum: Theory
- Topic: Stellarators with Permanent Magnets
- Replies: 21
- Views: 87027
Re: Stellarators with Permanent Magnets
Superconducting magnets effectively ARE permanent magnets; once you ramp up the current in the coils, you turn off the power and the current in the coils maintains itself indefinitely. You don't continuously supply them with power like you would a normal electromagnet. The only effective differences...
- Wed Nov 11, 2020 3:34 pm
- Forum: Theory
- Topic: thread for segments files and parameters for simulation runs
- Replies: 370
- Views: 335783
Re:
Another concideration for these sims. I assume that the grids are lines in these sims rather than real electromagnets with finite crossections. the magnetic and electric fields are calculated from lines at the center, of the coils, but if i recall correctly, they do have a minor radius, and an part...
- Wed Nov 11, 2020 3:28 pm
- Forum: Theory
- Topic: thread for segments files and parameters for simulation runs
- Replies: 370
- Views: 335783
- Wed Nov 11, 2020 3:20 pm
- Forum: News
- Topic: NASA reports on something called lattice confinement fusion
- Replies: 9
- Views: 15378
Re: NASA reports on something called lattice confinement fusion
sounds like pons-fleishmann cold fusion.
...which btw i feel should be renamed to something like "solid state fusion", or "condensed matter fusion".
...which btw i feel should be renamed to something like "solid state fusion", or "condensed matter fusion".
- Fri Jun 15, 2018 11:33 pm
- Forum: News
- Topic: 1st Superconducting High-beta Device
- Replies: 45
- Views: 89361
Re: 1st Superconducting High-beta Device
What do you mean by 2D configuration? The video and pictures you see are of the spindle or biconic cusp configuration. ... cylindrical (2-d) quasi-symmetry as opposed to spherical (3-d) quasi-symmetry. presumably the confinement is considerably worse, which suggests the device is used for researchi...
- Mon Jun 11, 2018 2:15 am
- Forum: News
- Topic: 1st Superconducting High-beta Device
- Replies: 45
- Views: 89361
Re: 1st Superconducting High-beta Device
* the earlier picture shows the plasma I glow mode. I assume that's just so we can see it, and that vacuum pressure is actually much higher. * I'm seeing largely a layered 2D configuration. So it makes me wonder: ** what is the theory of confinement? Expected confinement time? ** what kind of data a...
- Mon Jun 04, 2018 2:28 am
- Forum: Theory
- Topic: The Monte Carlo Method in Quantum Field Theory
- Replies: 0
- Views: 38897
The Monte Carlo Method in Quantum Field Theory
can quantum plasma dynamics be simulated in a reasonable time to a reasonable approximation using monte carlo methods with importance sampling?
https://www.jlab.org/hugs/archive/Sched ... r-Lec1.pdf
https://arxiv.org/abs/hep-lat/0702020
https://www.jlab.org/hugs/archive/Sched ... r-Lec1.pdf
https://arxiv.org/abs/hep-lat/0702020
- Mon Jun 04, 2018 1:44 am
- Forum: Design
- Topic: some options in plasma simulation
- Replies: 1
- Views: 35137
Re: some options in plasma simulation
Something based on this would be very cool:
https://arxiv.org/abs/hep-lat/0702020
Using Monte Carlo methods to reduce the time complexity of simulating quantumn field theory models.
https://arxiv.org/abs/hep-lat/0702020
Using Monte Carlo methods to reduce the time complexity of simulating quantumn field theory models.
Re: EMC2 news
The intent is to test machine scaling. And that is why it runs on thousands of cores on a supercomputer. Wait, so it _was_ run on a thousand cores, or it soon will be? Sounds like maybe scalability has already been tested or at least started to? Speculating here... Sounds like the problem has been ...
Re: EMC2 news
If all the optimistic comments are true then scalability is a non-issue. So then why was it said that scalability is "next"? Maybe what was really meant is that next is that simulation parameters will be varied to test -machine- scalability as opposed to -algorithm- scalability?!? Two entirely diffe...
Re: EMC2 news
The proverbial elephant in the room is the electromagnetic fields from the moving particles.
Re: EMC2 news
You can't do scaling until you have the first principles model figured out. There are some physics going on that were not understood, or to a degree even known. It is a very complex system. You can't have the reprentation of first principles figured out until you have the data structures planned ou...
Re: EMC2 news
You can't do scaling until you have the first principles model figured out. There are some physics going on that were not understood, or to a degree even known. It is a very complex system. You can't have the reprentation of first principles figured out until you have the data structures planned ou...
Re: EMC2 news
Wait, so then it doesn't use floating point numbers?ladajo wrote:No, not yet. Scaling is next.
I can share that it runs on 1000+ cells when it runs.
I would not say it is horribly inefficient, I would say it is high fidelity and very defendable.
Hard to imagine a scenario where scaling isn't first.
Re: EMC2 news
Ok so you're telling me the algorithm is horribly inefficient.ladajo wrote:It is First Principles based, and supported by coders and The processing power requirements alone exceed anything realistic folks here have access to for any kind of a timely output on a run. "