/r/plasma

Photograph via snooOG

A subreddit for the study and appreciation of the fourth state of matter, which makes up 99% of the visible universe. Discuss plasma astrophysics, fusion energy, and related politics.

A subreddit for the study and appreciation of the fourth state of matter, which makes up 99% of the visible universe. Discuss plasma astrophysics, fusion energy, and related politics.

Related:

/r/physics

/r/plasma

2,705 Subscribers

4

PrecisePower PTS-1 Demo- Plasma and Pulsing Mode

1 Comment
2020/03/11
19:02 UTC

3

Plasma Jet with compressed air question

2 Comments
2020/03/06
13:54 UTC

6

Advice on implementing plasma models

I m interested in studying magnetically confined plasmas. I have no formal training in plasma dynamics. Based on what I read in books and papers, I m planning to code up the two fluid model to computationally study the problem. Is the two fluid model a reasonable model to predict the dynamics of the flow?

6 Comments
2020/02/09
13:26 UTC

1

The relationship between plasma and magnetic fields is not something I know much about, but its crossed over into my field of interest, notably in the form of crop circles.

There is substiantiated evidence that plasma is crucial in some way to the formation of true crop circles, and these same crop circles have a dusting of particulate iron throughout them. Iron is very much so magnetic, and this opens a line of questioning as to how plasma and iron can be interactive to produce a crop circle.

I'll start off at the beginning. Mr. Leavengood was a researcher who was given seeds from a crop circle. The seeds(wheat, assumedly) were shrivveled and dry. It was found that these seeds yield 30% greater product than their non-crop circle counterparts. In this line of study he went on to create a device which exposes seeds to plasma. Through widespread testing, seeds treated in this manner produced 30%-400% greater yields than if they had not been "plasmaed." The seeds tested were of a great range of plant.

This, and other work, has created the Plasma Vortex theory and the like, essentially that plasma gets swirled around and the result is a crop circle.

The missing link is this particulate iron found at the crop circle scenes, and it is my speculation that magnetism is somehow involved, creating a new Iron Plasma Vortex theory. So, here I am, looking for information on exactly how magnetism effects plasma.

5 Comments
2020/01/29
09:35 UTC

3

In search of low pressure miniature plasma devices.

Hello all, I am currently working on a non-invasive diagnostic method for determining plasma density. Currently I am trying to determine the scope of application for different miniature plasma devices.

Some examples are non-equilibrium atmospheric pressure plasma jets (APPJ), microdischarges used for electrosurgery, nanosecond repetitive pulsed discharges in air, and laser-induced plasmas.

However, I was also trying to determine the scope of application for low pressure miniature plasmas. I have been looking into plasma antennas as a device that would benefit from the development of this diagnostic method. If anyone could suggest alternate low pressure miniature plasma devices I would greatly appreciate it.

Thank you.

5 Comments
2019/12/24
01:00 UTC

5

Seeking basic explanation for formation of straitions in lab plasma.

Hello people

I am trying to understand the phenomenon of striation formation in lab plasma but am not getting a clear explanation anywhere. So far from what I have read striations are the result of instability in population equations of electrons and ions or metastable atoms. Somewhat like Turing's treatment of reaction-diffusion equation. Can someone please provide with comprehensive explanation in accordance with recent research on the topic.

4 Comments
2019/12/15
18:42 UTC

5

Difference between magnetic reconnection and exploding double layers?

The title says it all really, I'd love it if any plasma physicists on this thread could explain the difference in the two phenomena, and how one can be told from the other. Thank you!

18 Comments
2019/12/05
16:09 UTC

0

Plasma physics

6 Comments
2019/09/23
13:51 UTC

4

High school interns develop a device that levitates droplets of water

Look, up in the sky! High school interns develop a device that levitates droplets of water

September 12, 2019

Among the many projects that interns worked on this summer at the U.S. Department of Energy’s (DOE) Princeton Plasma Physics Laboratory (PPPL) is an acoustical levitator that causes droplets of water to levitate in mid-air so their interaction with plasma can be examined. Assembled by Remy Plattiers, now a freshman at the University of New Haven, the device suspends droplets with sound waves whose high frequency is hard to hear.

Really fun

“This has really been fun,” said Plattiers, a June graduate of New Brunswick High School who worked with physicist Shurik Yatom of the PPPL Department of Plasma Science and Technology. “It was initially difficult” Plattiers said, “but when we got it to operate it was really fun and when I found out how to shift particles up and down that felt cool too.”

Programming the device was Alex Ni, a gold medalist in martial arts who had previously done summer programming at PPPL and now is a senior at the Hun School in Princeton (see below). The two were among 45 interns who worked at PPPL this summer on a variety of projects. (See story here.)

The levitator uses a programmable circuit board, called an Arduino, that generates ultrasonic-frequency waves that are amplified and sent to 72 transducers that produce a standing wave that traps tiny droplets of water in mid-air. Such a device could be used to levitate liquid droplets and study their interaction with plasma, Yatom said.

The levitator came in a kit that Plattiers put together with soldering help from Nirbhav Chopra, a graduate student in the Program in Plasma Physics at PPPL. “I had the kit for half-a-year in a drawer,” said Yatom, “and when Remy came I gave it to him for his project. He was very hands-on building the device and after he built it Alex stepped in to help with the programming.”

Plattiers plans to study mechatronics, a hybrid of mechanical and electrical engineering, at the university. “This project has given me ideas to test when I pursue engineering in school,” he said. “I am having a blast and will definitely come back and work here if I can.”

Sophisticated programming

Meanwhile, Alex Ni has performed and is learning sophisticated programming at the laboratory. He initially reprogrammed the laser interlock, a safety feature that automatically shuts lasers in the PPPL Laboratory for Plasma Nanosynthesis, and has been learning the computer language MatLab to facilitate easier analysis of spectral emission from plasma. “We immediately recognized that he is a very bright kid,” said physicist Yevgeny Raitses, who heads PPPL research activities that include the nanosynthesis laboratory.

Ni’s work on the interlock called for reprogramming the logic pattern of a larger and more powerful Arduino and fixing and modifying some wiring in the interlock circuits. The logic enables the lasers to know when curtains held together by magnets in the nanosynthesis lab are open or closed, and to shut down when the curtains are open.

Ni enjoyed Jackie Chan martial arts movies as a child and became interested in Kung Fu while a first-grader. He practices martial arts up to five hours a day during breaks from school and will compete in Shanghai, China, this October in the World Wushu Championship, a type of martial arts. As with Plattiers, Ni’s summer internship has heightened his interest in science and technology and he looks forward to increasing his knowledge throughout his career.

posted on : https://alertarticles.info/look-up-in-the-sky-high-school-interns-develop-a-device-that-levitates-droplets-of-water/

0 Comments
2019/09/13
05:14 UTC

8

Plasma Ball Metallic Smell

I've always been fascinated by plasma balls so I recently got one. I was playing around with it but I noticed every time I touch it, it leaves a weird metallic smell on my fingers. It also seems to leave this smell on other objects. Is this normal?

8 Comments
2019/08/02
08:26 UTC

1

what do I need to know before doing plasma diagnostics using a single langmuir probe?

please provide references as well, if possible.

0 Comments
2019/08/01
23:12 UTC

3

Any info on recently acquired ashing/etching chamber?

Hi, not sure if this is the right place for this but the company I intern for recently acquired a plasma ashing/etching chamber and unfortunately, we don’t have any manual or operations guide to teach us how to use it. I’ve attached a picture of the system to this post, and if anyone has seen something like this or has any helpful info about this system I would appreciate it! (The paper shown in the picture is just instructions for turning on the screen).

0 Comments
2019/07/09
16:06 UTC

4

Problem while constructing langmuir probe for DC glow discharges.

I am working on DC glow discharges and want to construct a langmuir probe. Circuit I am using is as shown in the picture. Also, I am applying ~1KV across cathode and anode. Problem I am facing is that I am getting discharge btw probe and cathode. Which isn't unexpected, but destroys the purpose of probe, but then how to construct langmuir probe for DC glow discharges? What should be the appropriate circuit?

https://preview.redd.it/4g8ej9mik9631.png?width=351&format=png&auto=webp&s=a78154ad00233a5b42a85ed39fc96a4935b53286

7 Comments
2019/06/24
08:15 UTC

4

Question about Analyzing Particle Flux with Probes

Hey Everyone,

I'm a fourth year undergrad interested in transport in magnetic fusion devices and I'm working on a research project where I'm processing Swept and Mach probe data taken off of shots from UCLA's LAPD to analyze turbulence. I already have average electron density and temperature from the Swept probe. I am right now writing up a code to process the Mach probe data to get average radial velocity. I was wondering if anyone in the community has any good tips/resources on a few places I'm stuck on.

So, I understand the theory behind Mach probes, but I am a bit stuck on the actually analysis particularly on the perpendicular flow. This is because the resources I was given by my collaborator at UCLA are contradictory on this. I've read a bunch of papers (particularly those by Hutchinson) and they don't seem to spell out what to do as clearly as any resource on Swept probes. I'd be appreciative if anyone has a good resource on this they'd be willing to share.

I've also been looking for a good resource that details how to get the fluctuations so that I can go and calculate particle flux. I have a bunch of papers that detail the math well, but they all assume you already have out the fluctuations. Intuitively, I have an idea of what needs to get done, but I'm not sure about the actually method used. Again, I'd really appreciate some kind of 'How to' from those more experienced in this than myself.

It's fine if this gets buried as I'm going to have a Zoom meeting with my IP and collaborator on Monday so I'll be able to get a lot of clarification then. I just prefer to come to meetings with some preparation to not dwell on the boring minutiae since these people are obviously a lot more busy then me. I'm also just kinda jumping the gun as I'm finally starting to get into the cross-phases and coherency and all those other fun buzz words that I often hear from MCF transport guys. Thank you for any help!

2 Comments
2019/05/30
17:30 UTC

2

Question about plasma cannon

I'm 14 and new to this but I found out about these plasma cannons on YouTube and I'm trying to make one that I can wear on my arm like iron man but also more powerful than the regular bottle trick. My question is how can I make a compact plasma cannon that has more power

2 Comments
2019/05/18
20:20 UTC

0

Question about Hho generator

If I were to create a hho generator and attach a torch at the end of the pipe that releases the hho to fuel the torch would it work or would blow up? If it works can I use it for a plasma cannon?

2 Comments
2019/05/17
19:50 UTC

0

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

https://preview.redd.it/spvekms61oi21.png?width=1456&format=png&auto=webp&s=22199b2f8b815a75045df48e9568e50c04c2be8b

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/

1 Comment
2019/02/25
08:38 UTC

11

Railgun plasma generation

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!

2 Comments
2018/12/30
19:28 UTC

3

Donated plasma lots and lots, yesterday I got super sick

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

2 Comments
2018/12/09
13:28 UTC

0

Plasma and asthma

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.

4 Comments
2018/12/05
13:25 UTC

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