Plasma Definition and 681 Threads

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

Hello Two temperatures state in non-equilibrium plasma has different vibrational temperature and translational temperature. Vibrational temperature is more than translational temperature usually. Help me to find a book or article for describing thermodynamics of this state.

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, I recently graduated with a B.S. in Mechanical Engineering. I'm currently exploring my academic options as to continuing education. After reading through the UCLA master's program concentrations, I came across the micro electro-mechanical systems - nanotechnology category. I found this...

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: " Hans C. Ohanian " ) and want your opinion about my...

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...

Hi, I'm in my final year at an Australian high school and I plan on completing at Bachelors in Science Majoring in Physics as my undergraduate course. My career aspiration is one day work researching nuclear fusion, though I am happy to work with fission reactors, they're just not my first...

Hi! I have kind of learned that a low density plasma is easier to ignite than a high density plasma. Rearranging the Saha equation gives: n_i^2=2.4*10^{21}n_nT^{3/2}\exp-(\frac{U_i}{kT}) Now, if the neutral particle density, nn is low, temperature needs to be even higher. On the other hand...

Hi! I just wonder what's the actual use for p=nkT≈nE_k[J/m^3] when it comes to plasma physics? What does p help us understand/enable? While Ek is related to particle velocity and thus temperature, this "new" concept of pressure tells me nothing other than particle density will have...

What is the difference between "Gas Phase Ion Chemistry" and "Plasma Chemistry"? If one wants to learn about the ionization and dissociation processes of hydrogen gas are either of theses fields appropriate to study?

Let me give you a glimpse at my research. I uploaded a video of my latest simulation on youtube, . You can see the formation and evolution of vortices in hot plasma such as fusion plasma. The subtlety is that these vortices do not live in the real, everyday-life 3D space, but in an...

Hi, I'm curious, how would I create an electric field to a noble gas in a sealed vacuum and how much energy is needed to create plasma from air? You see, I'm building something, and theorizing. A plasma theory that uses the simple concept of convection, the hot air will make the craft rise...

Homework Statement Let's consider a Tokamak with major radius R=1m and minor radius a=0.3m, magnetic field B=5T with a deuterium plasma with central density 10^{20}m^{-3}, central temperature 1keV and parabolic temperature and density profiles \propto (1-r^2/a^2) a) Find the electronic...

Hi, recently I saw a great video about some scientists levitating small objects in mid air by trapping them in overlapping 180 degrees out of phase sine waveforms. It is easy to see that air is the medium through which sound can travel and sounditself being the vibration of air traps these...

Hello everyone! I am about to finish my freshmen year in college and I have decided that I would eventually like to become a physicist. More recently, I have decided that I would like to study plasma physics and devote my time to work in controlled fusion. However, I have seen some threads on...

Hi everyone, This is my first post here, so go easy on me. :) I am looking towards investigating the properties of plasma antennas, where a plasma is created in a sealed container, and the RF signal is either capacitively or inductively coupled and the transmitted. However, I am wanting...

Hi guys, To celebrate my 29th post (I know!) I wanted to ask an extra-good question, something I've been meaning to ask for a long time... So, following on from my previous post 'Plasma Condensation' (Hm, wonder what I'm studying?) I am going to ask something about something I read in...

what is the feasibility of sustained fusion by employing magnetic confinement of plasma?

Simple question: what's the density distribution of a plasma cloud confined in a magnetic bottle? On the plane perpendicular to the central axis, Is it normally distributed or is it uniformly distributed inside a circle or is it something more complicated?

I'm trying to read as much as I can about the topic. So I've read over wikipedia and watched some videos and such. It seems to me, this method of plasma acceleration would be prime for space thruster applications. Right now VASIMR is using ICH rf coupling to accelerate their plasma. They...

Reading about plasma pyrolysis suggests that a plasma arc ionises an inert gas, the explanation continues to suggest that steam is commonly used as the gas. This sounds nuts to me as H20 isn't formed of noble gases and therefore can't be inert. It seems to me that as steam ionises would produce...

Plasma-fire Unlike a (normal) fire, a plasma-fire combusts at excess 10 billion Kelvins (in general terms, 3.8 billion °F), it is notorious for it's special danger via nuclear scientists to emit ionizing radiation (up to x-rays) if the plasma remains consistent (does not burn out, and...

What is the highest density of man made plasma?

Homework Statement An ionized plasma flows with a velocity v in the z direction, though a rectangular pipe with x, y, z dimensions of w, h, l respectively. The walls at x=\pm w/2 are insulating while the walls at y=\pm h/2 are conducting. Lastly there is a magnetic field B in the x...

Hi guys! So I just need help in one tiny thing. Does anyone know a good book that can thoroughly explain physically and mathematically diamagnetism in plasmas within magnetic fields? I would really appreciate the help guys! Also, I am very much familiar with vector calculus (also tensor calculus...

Homework Statement A plasma is to be used as a shield against a laser in the visible spectrum (400 - 700 nm wavelength light) by attenuating the field amplitudes. (a) What is the minimum electron density that should be used? (b) What thickness of this shield would be needed to reduce the...

Hi there, I was wondering that if you took anything, let's use water as an example, evaporated it into a gas, then heated it until it became a plasma, (I don't know or care whether water molecules can be turned into a plasma, that's not the point,) could it be turned back into a liquid/solid? I...

Recently i have read a paper about another the way of plasma confinement. It is name that a quasi-gasdyanmic plasma confinement regime. How to surpress the MHD instability? Maybe i don't present a clear physics imagine. Wishing somebody can connect me? My major is Ion Source in Accelerator...

Hello, I just got a free application fee waiver from NYU and I was wondering if anyone here knows if they do any plasma physics research there? I might as well apply since its free, but I can't seem to find anywhere on their site someone who does plasma physics. I don't mind what department...

http://i.imgur.com/bLUjP0Q.jpg is something like this even possible in a light bulb? i thought the interior was supposed to be a vacuum.

Does space plasma explain dark matter? I have read about how Voyager 1 showed that there was different density in between our solar system and other galaxies. Doesn't the existence of space plasma then explain that the matter we cannot see is in fact space plasma? I really feel as though I am...

Hi all, I recently read the wiki article on Plasma wakefield acceleration and it states that plasma is "The most efficient transformer known" but does no explain how (or maybe it does electrodynamics and induction are not my strong suit) and when I google it the only things that come up are...

I was taught (In my old thread which was then closed by a mentor) that it is impossible to magnetically confine a plasma ball. But I've since then had an idea how it could be possible: Instead of using a steady magnetic field, use a rapidly rotating magnetic field. The field lines are always...

I understand (I may be wrong) that the highest density material is that of a quark-gluon plasma, such as the interior of a neutron star. Is there an upper limit to this density and is it known?

Hello everybody. I have a question about generation of return current in plasma beam interaction process: we enter an electron beam in a plasma medium, and this electron beam generate a return current in plasma, I want to know how electron current can produce a return current in plasma...

Hi, I am trying to find a detailed explanation of how a plasma globe works but can't find any detailed info on the web. From what I have read it seems to suggest that the electrode at the center creates an alternating voltage which emits high frequency radio waves. These radio waves ionize the...