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by happyjack27
Fri Jun 15, 2018 11:33 pm
Forum: News
Topic: 1st Superconducting High-beta Device
Replies: 33
Views: 7223

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...
by happyjack27
Mon Jun 11, 2018 2:15 am
Forum: News
Topic: 1st Superconducting High-beta Device
Replies: 33
Views: 7223

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...
by happyjack27
Mon Jun 04, 2018 2:28 am
Forum: Theory
Topic: The Monte Carlo Method in Quantum Field Theory
Replies: 0
Views: 729

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
by happyjack27
Mon Jun 04, 2018 1:44 am
Forum: Design
Topic: some options in plasma simulation
Replies: 1
Views: 1992

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.
by happyjack27
Fri Oct 13, 2017 1:25 am
Forum: News
Topic: EMC2 news
Replies: 331
Views: 65406

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 ...
by happyjack27
Tue Oct 10, 2017 11:50 pm
Forum: News
Topic: EMC2 news
Replies: 331
Views: 65406

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 enti...
by happyjack27
Sat Oct 07, 2017 6:11 am
Forum: News
Topic: EMC2 news
Replies: 331
Views: 65406

Re: EMC2 news

The proverbial elephant in the room is the electromagnetic fields from the moving particles.
by happyjack27
Sat Oct 07, 2017 4:56 am
Forum: News
Topic: EMC2 news
Replies: 331
Views: 65406

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...
by happyjack27
Thu Oct 05, 2017 10:30 pm
Forum: News
Topic: EMC2 news
Replies: 331
Views: 65406

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...
by happyjack27
Wed Oct 04, 2017 10:55 pm
Forum: News
Topic: EMC2 news
Replies: 331
Views: 65406

Re: EMC2 news

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.


Wait, so then it doesn't use floating point numbers?

Hard to imagine a scenario where scaling isn't first.
by happyjack27
Mon Oct 02, 2017 10:40 pm
Forum: News
Topic: EMC2 news
Replies: 331
Views: 65406

Re: EMC2 news

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. "


Ok so you're telling me the algorithm is horribly inefficient.
by happyjack27
Mon Oct 02, 2017 10:36 pm
Forum: News
Topic: EMC2 news
Replies: 331
Views: 65406

Re: EMC2 news

It is First Principles based, and supported by coders and physicists (International even...) I don't think anything I have seen here over the years can compete. The processing power requirements alone exceed anything realistic folks here have access to for any kind of a timely output on a run. This...
by happyjack27
Mon Oct 02, 2017 4:46 pm
Forum: News
Topic: EMC2 news
Replies: 331
Views: 65406

Re: EMC2 news

ladajo wrote:I can share that the coding effort was collaborative between some of the top minds in the field.


Wait, by top minds do you mean top physicists or top coders?

big difference...
by happyjack27
Mon Oct 02, 2017 4:43 pm
Forum: News
Topic: EMC2 news
Replies: 331
Views: 65406

Re: EMC2 news

You will have to wait. Sorry. I can share that the coding effort was collaborative between some of the top minds in the field. There is nothing else like it right now. It is the cutting edge for plasma sims. :) and proprietary. Then I bet it uses my distributed dynamic octree idea for massive scala...
by happyjack27
Mon Oct 02, 2017 2:05 am
Forum: News
Topic: SpaceX News
Replies: 2113
Views: 255756

Re: SpaceX News

Another thing to consider is that a rocket's velocity at a given altitude is optimized for maximum fuel efficiency, considering the air pressure and thus friction. Basically it goes as fast as it can so long as that's below terminal velocity. The available thrust-to-weight ratio can then be taken in...

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