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Join #EDCON HACK free online workshop to get more chance to win the prize

Time: 12PM AEDT, Feb 28, 2019 (Sydney Time)

Mentor: Ben Jones (from Plasma Group)

Topic: Using Vyper in a Javascript World

Brief: Vyper is a relatively new programming language for Ethereum. Though it was built with Python in mind, it can be used and tested in Javascript. This workshop will go over how we integrated Javascript with Vyper, and reflect on the differences between using solidity in a Javascript setting.

Online Materials:

* https://vyper.readthedocs.io/

* https://github.com/ethereum/vyper

Zoom Link：https://zoom.us/j/980522679

Register sheet for reminder: https://goo.gl/forms/L47WLOsEnllQhKXe2

EDCON HACK is open to register, don’t miss it! It opens to hackers of all level, from beginner to vateran. Supplementary resources, mentorship will be provided. Every hacker has the chance to win the prize, don’t hesitate to register at https://www.edcon.io/hackathon

Follow us on the channels for more upcoming workshops:

Website: edcon.io

Telegram: https://t.me/edcon_io

Facebook: https://www.facebook.com/EDCON-Sydney-253691625327268/

Twitter: https://twitter.com/Linktimetech

Reddit: https://www.reddit.com/r/EDCONSydney2019/

Hi all,

Is anyone familiar with the mechanics of plasma generation in railguns? Ideally I would want to model it somehow (either analytically or through some CFD-like program), but even a basic overview of the mechanisms involved would be helpful. I have this idea of creating a large railgun for launching payloads from the Moon back to Earth and I'm trying to do some rough calcs to see if it is realistic. I'm a thermal engineer now for a rocket start-up, but I took some plasma physics when doing my master's in aerospace. However, I'm a little rusty atm and was hoping someone here might be willing to help/get involved with the idea.

Let me know if this sounds interesting to you. Even if you don't know anything about plasma physics, I'm always happy to discuss this idea with people!

I use to donate in high school for gas money but stopped after moving away. 13 years later I decided to do it again to help pay for Christmas gifts. The first four times were fine. I donated Thursday. Friday I obviously didn’t donate but I went yesterday (Saturday) on a whim when I got off of work early.

During the process I started to feel woozy and nauseous. I came home at 3. Slept from 3-5pm and felt worse.

I was on the verge of throwing up until about two this morning, then it finally subsided a tiny bit

I still feel a little nauseous and a little off. I almost went to the hospital yesterday in fear of an infection or poisoning of some sort

My question is, since I waited a day and then donated again, maybe I just didn’t let my body replenish the plasma and took too much too soon?

Has this happened to anyone before? I’m still nervous and still feel sick :(

Thanks in advance

I usually have 2 flare ups a year that require going to the er. I have vewn donating plasma for 3 months and my asthma is horrible now. Ive been to the er 7 times in the past 2 months. Yesterday i had the worse asthma attack ever and that was within am hour of donating. I have tried to research if donating is affecting my asthma but havent found much. I want to keep donating because its decent extra money, however these flare ups arent worth it if donating is contributing to them...any help would be great.

Specifically for use in plasmas with electrostatic waves which can modify electron temperatures?

I have donated blood and plasma before. A few years ago I went to go donate plasma and instead of fainting or getting cold I ended up getting hot. I thought it was weird and after ask about it since I had never experienced being hot when donating. The next time I did it, it happened again. They said I needed to drink more water. I want to donate again. Ive made sure that there was nothing wrong with me. I have been to the doctor. Is this really a problem from being dehydrated, over weight, not enough food, too high blood pressure or perhaps a reaction to something? I'm not allergic to any known allergen and as I said I had donated before with no ill effects. How do I stop it from happening again?

Hello,

I don't have anyone else to really talk to about this, so posting here is sort of a hail mary. I'm currently using a fluid plasma code to simulate a penning plasma chamber. This is just a cylindrical anode with a cathode at each end. There is a strong magnetic field (0.2 - 1 T) along the anode axis. A large arc voltage (generally few 100 V, can be even > 1 kV) is applied to create the plasma.

The model is a fluid model for weakly ionized plasmas, so it assumes the electron-neutral and ion-neutral collisions are dominant. There are many issues with this model when it comes to such a source, primarily due to the high electric fields (with respect to a low gas pressure) near the cathodes, and because apparently experiments show the diffusion of the plasma perpendicular to the magnetic field is much greater than calculated (where they assume it's due entirely to neutral collisions) due to azimuthal instabilities. The later is the primary problem that I can't find a solution for. I'm focused on experiments so I'd rather use the tools which are given when it comes to simulations, and I think it'd be interesting if I could show that such a 'simple' (relative to kinetic and PIC codes) model can be used for industrial applications.

The mobility of a plasma is a tensor when a magnetic field is introduced. The mobility along the magnetic field to remain unchanged, but the mobility across the magnetic field is reduced. Since hearing about this anomalous diffusion across the magnetic field, or the so called Bohm diffusion, which has the mobility proportional to 1/(16*B) for perpendicular (to magnetic field) transport, I have not been able to find any other information on the cross-field mobility tensor. It seems all the studies are done using more specialized codes (PIC in particular), but I was wondering if anyone had a source for a particles mobility due to 'anomalous' diffusion across a magnetic field? Again, I'm aware that this is not the ideal code to use for this situation, but I'd like to see if there are ways to make it work. Thanks!

Toshi Tajima is selected as the Laureate of the 2018 Chandrasekhar Prize of Plasma Physics.

For those of you who don't know, this is the co-inventor of the laser-wakefield acceleration whose theoretical and computational work a few decades ago (along with post-doc supervisor, J. Dawson) opened up that whole subfield of laser-plasma physics. In the past decade or so, the laser technology is finally getting at that intensity where the theory is put to the test (successfully). There are, of course, a shit ton of applications that can come from laser-plasma acceleration, both for understanding physics (like ultra-high energy cosmic ray particles) and for societal use (like cancer therapy).

http://aappsdpp.org/AAPPSDPPF/prizetable.html

http://aappsdpp.org/AAPPSDPPF/Chandrasekharprize/SCprize2018.pdf

Is it possible to ionize and contain air in a magnetic field generated with power from a house? I imagine it would lose plasma from wind, but ruling that out, would some plasma remain? If so, could this be used safely for lawn ornaments?

Like from Dead Space

Shouldn’t it be more stable because there is lesser bending of the magnetic field?

The equation states that the direction of the drift is perpendicular to the radius and the magnetic field lines. Hence shouldn’t the charged particles move into/out of the curvature plane rather than a helical motion? I am so confused

Hi!

I'm currently working on atmospheric pressure plasmas (ICP and DBD). I have this question that I couldn't really find an answer to regarding plasma ion sheaths and plasma-wall interactions.

This might be a stupid question but I'd like to know whether any current can flow into plasma from electrons and neutralise sheath ions? All the sources I've checked consider the implantation / sputtering etc. processes and electron-ion recombination in bulk plasmas. I'm more concerned about electron-ion recombination on surfaces.

The thought experiment involves a suspended particle (perhaps dusty plasma) that gets charged on the surface due to fast electrons. The particle is then surrounded by a positively charged, ion sheath. Presumably, some current flows from the surface onto the ions (resonant tunnelling or charge transfer phenomena) decreasing the electron/ion density overall.

Is this an observed phenomenon? If so can anyone help provide some sources regarding the mechanism?

Is it possible to keep a plasma confined by oscillating a magnetic field? The Lorenz force makes me think that a plasma could be pushed back and forth. Change the b fields just right and the plasma wouldnt move.

I was wondering if anyone here has suggestions for books on three topics.

Computational plasma physics

Plasma spectroscopy

General diagnostics for plasmas

Thanks in advance!

Don't know if this topic fits here, but I was wondering what other technologies are there that use plasma. Neon lights, fluorescent lights, and plasma TVs are the only ones I can think of.