Plasma Definition and 618 Threads

Recently, Germany broke headlines when they fired up their nuclear fusion reactor. As I'm sure most everyone on this forum knows this, they plan on creating fusion by heating plasma to absurd temperatures while containing it in a magnetic field. What method do they use to heat the gas and...

Hello, I am a new member here at physics forums and find myself unsure of how to go about pursuing my career interest in nuclear fusion research, and if it is even something I should be pursuing at all. My goal is to some day work in fusion research, but everyone I have talked to about this...

I was reading a paper recently about guiding electric arc discharges with lasers. http://loa.ensta-paristech.fr/ilm/uploads/ILM/134_Forestier_discharge_AIPAdvances_2_012151_2012.pdf Since electric arcs are plasmas and they seem to be stabilized by lasers, could the same principle be applied to...

phase diagrams show the change of the state when temperature or pressure are modified. to achieve this, is necessary heat, but my questions is: would plasma state be described in this diagrams? is this figure true? because plasma state can be generated by heating.

What gives it this property?

I have been intrigued by reports over the years from witnesses who claimed (at various sites) that before a particularly severe earthquake, that unusual atmospheric phenomenon that would seem to be best described as various forms of plasma (super heated gas) were seen. Is this something accepted...

So, assume you have a plasma in a vacuum made of an even distribution of 50% electrons and 50% protons all flowing in one direction with low collision frequency. Then you suddenly turn on an external magnetic field and watch what happens. How will the plasma react? Will the magnetic field...

Let's say we have a mol of hellium-3 and we heat it up until it becomes plasma. What happens to the neutrons? Wikipedia does not mention anything about them. It only says that "Plasma is loosely described as an electrically neutral medium of unbound positive and negative particles". Just to make...

Hello all, quick question: When Plasma cools what state does it return to? Is it a liquid or the state it was in before at room temperature? Do the atoms rearrange into what it was like before i.e. the same element or something completely different? Thank you

I am going to presenting on a scientific report and the report that I choose (this can still change) is the following: http://onlinelibrary.wiley.com/doi/10.1029/2001GL013014/pdf In this report, they ask the question of what produces what? Does plasma flow produce an electric field? or Does an...

I am interested in applying plasma physics in nuclear fusion program in France or Germany . Both are good in this field , but where i can get good scholarships and i am from electrical engineering background so where i have better chance of getting admitted.

Hello everyone. I am new in this forum. I am from Turkey and I want to go abroad for Ph.D. but I have concerns and a lot of questions in my mind. My GPA from BS is 2,98/4 (I know it is not good). This year my second year my master. Probably I will graduate with 3.50-4.00 GPA. My master...

Does plasma transport oxygen?

I was wondering , because all I know is that we got solid . Heat it up enough and you get liquid . Heat that up enough too and boom ! There's gas . Plasma is another transformation in this category , in this case , about heating up the gas enough . And I wanted to know , if there is anything...

Hi there i wonder how can i measure the plasma temperature ? and what is magnetic field have the impact to plasma or not? Thank you all.

Hi, I don't know if it's the right place for this question, but- I need to create a satellite model, that after being in space, will come close to the atmosphere, and then go back up again. In its way up it need to use a pulsed thruster. (This needs to happen multiple times...) Does a pulsed...

Hello, as a software engineer I am used to having industry specific trade journals from ACM that discuss Operating systems, genetic algorithms, neural nets, etc. ... Are there any equivalent ones for physics that covers fusion plasma and it's topics such as electromagnetism, superconductivity...

Hello, I have been doing software engineering for over 20 years and I feel like it's time for a change before I get too ancient. I have been following and reading about plasma fusion for a number of years now and I would like to study this and be able to do some research in either a Ph.D...

Why do all wakefield accelerators seem to use either electrons or positrons? Is there any reason you would have difficulty creating a laser driven proton plasma wakefield accelerator? (that is, in comparison to an electron accelerator) Thanks.

my 3inch plasma globe needs 5V 300mA dc supply... Can I use an adapter with 4.5V and 50mA output rating? If can't then what will happen if I still do use it?

The reason I did not place this in the nuclear engineering forum is because I feel that it is closer to an electrical engineering problem than a nuclear engineering problem.Now to the question. I recently got another geiger counter and a plasma globe for my birthday. Being the person I am I...

Hello. I'm studying principle of Langmuir probe and got several questions. 1st, the textbook suddenly tells that ion density within sheath is ni(x) = nis(Vs/V(x))1/2 where nis, Vs are ion density and plasma potential at sheath edge. I found some document which shows that it is obtained by...

Hello, Microwaves are classified as non-ionizing radiation, so my question is, how do microwaves separate atoms into positive ions and electrons? I've heard of multi-photon ionization, is this what happens?

Hello PF, This has been frustrating me for a while: The plasma inside a tokamak is being heated by current induction, which accelerates the ions and electrons in specific directions, thus the velocity of ions increase. These ions collide with each other, eventually randomizing the motion. Now...

Hello I am looking to pursue a master or Ph.D in plasma physics focusing on fusion tokamak reactors. I have an undergrad in Comp Sci and am starting the necessary physics work to apply to grad school. Besides electromagnetics, are there other areas I should focus on? What are the best websites...

Hi, I curoius if there is any way to hold plasma into one spherical ball intead of donut as seen in tokamak using magnetic field? I have came up with a few design but it doesn't seem to do it. Thank you.

I know Blood=plasma+blood corpuscles blood corpuscles=WBC +RBC+Platelets plasma=serum+clotting factors But I am not sure about lymph is lymph equal to plasma+WBC i.e lymph=plasma +WBC

Hello, this is my first post, i only have what we call an O Level Physics here in the UK, but i have a strong layperson's interest in the subject, so I'm looking forward to picking the brains of the more educated people here. My friend's professor showed him something very interesting, all to...

Hi there, I have some questions about plasma I wonder is it possible to use another gas (not inert gases) ?. and where i can find more information of plasma jet ? because it's almost have a copyright. Thank you.

http://www.news.com.au/technology/science/aussie-student-proves-existence-of-plasma-tubes-floating-above-earth/story-fnjwlcze-1227379756018

I've been reading some about the ITER project, tokamaks, and other approaches to plasma containment. Why can't ion trapping approaches such as an orbitrap be used for fusion plasma containment?

hello I was good in physics and chemistry at school and I have relatively good pre-university knowledge but I never read about plasma which book is complete enough starting from the beginning and mentioning plasma? none of my physics or chemistry books mentioned plasma and it's really...

I just cannot confirm which one exist in my process. how can you differentiate between plume behavior and its interaction with laser from the ones with plasma? Thanks in adnvance

Hi there, So I have two questions really. My first question is, I'm having a bit of trouble finding which books I should get to teach myself plasma physics. My school doesn't offer a course on the subject, sadly, so I asked my professors, who do nuclear research, and they didn't know which...

I am interested in adding simultaneously O2 and H2 in a magnetron sputtering discharge ignited in Ar at a pressure of 3*10-2 mbar. The discharge is driven by a RF generator (13.56 MHz, 60 - 120W). The target is W. Can anyone told me if I can expect at any explsion to apear due to simultanoously...

I was curious about why the plasma inside a modern fusion reactor (ITER, DIII-D) is modeled with a D-shaped cross section. From what I've read, it is more stable that way, but WHY is it more stable than a similar plasma flow with a circular cross-section? Thanks in advance (and sorry if I...

I think that this goes in this category... Do you know if anyone is doing current work on plasma railguns? The most recent stuff that I've seen about it is still some years old.

I am currently doing my undergrad in electrical engineering and hope to specialize in power at the end of it. In short I am fascinated with energy and confronting the problem of the global energy crisis Is it possible to switch from ece into r and d of fusion technology? I would love to get a...

HI, Some things I want to confirm, somethings I need to be reminded of: So what I remember is that Magnetostatics - stationary charges Electrostatics - constant or slow moving charges And that an accelerating charge makes a magnetic field, but you need a time varying field to move charges. So...

Homework Statement Pulsars are stars that have suffered gravitational collapse. They rotate rapidly and emit a narrow beam of radiation. The pulse lengths, at the earth, are ∼1ms and the periods are ∼1s. Within a few months of the discovery of pulsars distance estimates were obtained by...

Right, I know that plasma has a very high charge because of electrons doing stuff and that the plasma can be contained and controlled using an electromagnet, but can it be put the other way round? Say I have a chamber with plasma in it, generated by whatever, and I put an inductor outside the...

Hello, I need to know the average temperatures of electrons and ions in a field-reversed configuration (FRC) plasma, particularly p-11B or D-D. However I couldn't find anything on the internet. I appreciate any piece of information. Thank you.

Hi there, I'd like to know if a small plasma cutter setup could be used for etching and sputtering... for example, finding a way to make a little plasma arc flow in air like a sputtering and etching beam. I doubt i can use an arc directly without burning up and destroying what I am trying to...

Homework Statement I need to calculate the drift speed, drift orbital period and current density for 1eV protons and 10eV electrons. The density is 5 cm^-3 The assumption is that it is only a grad-B drift Homework Equations <V> = [6*E/(qBo*L*Re)](0,35 + 0.15sin(a)) The Attempt at a Solution...

I know that fusion experiments are difficult due to the fact the plasma seldom stays stable for long, but what exactly causes this plasma instability and are they any formulas to possibly predict the destabilisation of the plasma?

hi every one i'm alireza from sampad high school (iran) first, excuse me for my bad english i want to have a research about plasma jet ... i know nothing about plasma and plasma jet but my subject is about it ! i bought a book (name: " [FONT=Arial]Hans C. Ohanian " ) and want your opinion...

Hi guys. I had a question concerning a pure proton plasma with a given temperature and its loss of energy due to the Stefan-Boltzmann law. From my understanding, the Stefan-Boltzmann law applies to objects that contain electrons. I don't think that's true but I would like to know if it is. If...

Hello All, In this recent Navy publication, a team of researchers said they have discovered cusp confinement. This could be a major step towards fusion power. I am working on a write up of this publication. I am trying to understand their inferometry data. As far as I can tell, the...

Reposting from another section... Can anyone explain to me how an excimer is formed? Like structure wise? Considering Xenon. I've gathered that an excited state Xe*, ground state Xe, and a 3rd body M react resulting in an Xe* excimer + M(carrying away excess energy). I'm struggling to find...

Good day , while reading about DC DC converters I stumbled upon some papers discussing a DC DC plasma transformer , the science behind it being similar to tokamak current drive or so they say , I tried to search various links for some information to get a clue about how it works but I couldn't...