Plasma Definition and 681 Threads

I was wondering if we could create some gaseous matter whose ionization energy is very low, so it can be fully ionized under room temperature, thus converted in plasma. I know that plasma loses energy quickly by radiation, if we could harness this radiated energy, won't this violate the...

Homework Statement Attached as pdf. Homework Equations Attached as pdf. The Attempt at a Solution I know that refractive index is given by n=\sqrt{\varepsilon} normally. But is it still the case when asked for n( \omega) ? If so, I've tried rearranging equation 3 for...

Greetings, I have shifted much of the focus of my research from thin film specifics to the plasma chamber we are using, as I was unfamiliar with the intricacies of plasma and found that a lot of the parameters we are counting on frankly could not be counted upon. I'm still green, but it's...

When I touch the surface on plasma ball, do I receieve free electron from plasma ball? or do plasma ball take free electron from my finger? Does anyone have any suggestions? Thanks in advance for any suggestions

Calculation of plasma frequency and static dielectric constant (urgent) Hello: Can anyone tell me how to measure the plasa frequency of a metal and wherher energy band gap of a metal is equal to the plasma energy of that material which is equal to (plank constant * plasma angular...

Hello: I want to calculate the plasma frequency of Au, Ag, Cu and Al. But wondering what is the most precise way to calculate the plasma frequency.If anyone can help me with that it will be really appreciated. I know that Plasma Energy = √(n*e^2/(m*ε°)) = plank constant * ωp Here...

Homework Statement Find out whether particle or heat diffusion determines the width of the SOL, and whether the ions or electrons are the determining factor. (just compare all of those). Give an expression to estimate the thickness of the SOL and evaluate the expression for Te = 10 and 100...

Homework Statement An analysis of proteins in plasma membranes would reveal that: they are all enzymes. they are immobile in the bilayer. they are entirely non-polar molecules. they are formed from nitrogenous bases linked together by peptide bonds. they are built by the same...

I've been wanting to make a plasma cutter that can melt metal fairly fast. I was just wondering how to! Also I was wondering if plasma is attracted to magnets, because I want to make a sort of force field but won't go into details. I want to do this for a science project and info would help...

Hi everybody, nice to meet you all I'm studing Physics in Catania University, Italy, and I'll get the master degree in Physics next summer. My thesis will be on plasma focus and I will spend a period in Bologna, DIENCA laboratories to work on it. I would like to know if there will be any...

I don't know if this is the right topic to put it under. But I am looking for some information about plasma electrolysis. Does anybody know anything about this - or perhaps know where I can read about it? Google doesn't give the best links.

Homework Statement Consider a positive point charge +q, immersed in plasma. Show that the net charge in the Debye shielding cloud exactly cancels the test charge. Assume the ions are fixed and that e*phi <<< kTe. Homework Equations f(u) = A exp [-(1/2*m*u^2 + q*phi)/k_b*T_e] u is the...

Hi, I've got conflicting impressions on the motion of particles in tokamak reactors. Wikipedia says that they generally follow the poloidal field lines due to the Lorentz force, whilst another site claimed that the promising results were due to the random motion of the particles within the...

Theoretically, if scientists could find a way to contain quark-gluon plasma, could they use it as an energy source like one would use a small star, or are they totally different things?

Can you guide me the research topic of electromagnetics in plasma..is it related to physics more tha nengineering..how abt the career opportunities.

I'm sure most of you on this board know what the VASIMR plasma rocket engine that is being prepared to be tested on the ISS. I read that high-powered radio waves are used to heat the argon gas to the plasma state of matter and then the superconducting magnets eject the superheated gas out of the...

Hi, there have been a number of recent papers with regards to radiation from hypervelocity meteor impact, where the authors propose that the radiation originates from self-consistent electron oscillations at the plasma frequency. Some examples: 1) Close et al - Journal of Geophysical...

Firstly, I want to do this for a science fair project. I want to create a magnetic force field with plasma also. Second, I would like to know how dangerous it is to make and handle. Third, is it illegal in Canada? Fourth how do you make plasma cheaply? What parts do I need, ect...

What I am imagining is a thruster in space igniting a fuel to create an explosion to push a spaceship and phonons (mechanical waves) pushing the spent fuel to the sides of the thruster where vents vacuum it back into the spaceship for recycling. What do you think of this?

A plasma is a gas (or, I guess a liquid, at high enough pressure or.. cause of other properties..?) witch has its electrons separated from the rest of the atom, witch is now a ion. So it is a mixture of free electrons and ions. Is blood plasma really this? I cannot find any information on this...

Suppose I had some plasma in box with walls that allowed nothing thru, photons, plasma, energy. Now heat the plasma and maintain some temperature T (ignore the difficulty in heating the plasma with the above walls, just assume you can). An approximation to this might be some small region of the...

I came upon this question in plasma physics

I am trying to understand the Grad Shafranov equation, and in particular its inputs and outputs. I understand that the equation determines the conditions under which plasma may be in equilibrium. In particular, the MHD equations of equilibrium state: \nabla p = J \times B and the...

A plasma is when electrons become unbound by their atoms. So does that mean that you can get a different plasma for all different types of atoms (like gold plasma and helium plasma)? Also the electrons are not free as they are bound to the plasma (but not individual neuclei) by the magentic...

I have a question about the diamagnetic current caused by plasma pressure gradients. Various plasma physics / MHD texts state that the current due to a plasma pressure gradient in a magnetic field is given by \mathbf{J} = \frac{\mathbf{B} \times \nabla p}{B^2} where p = nkT My question is, if...

Is there plasma that doesn't radiate visible light? I think the electrons falling back to the nucleus radiate visible photons. But what if the plasma only has particles that are not atoms?

Homework Statement hi everybody i want to make report in cold plasma and what is the difference between cold plasma and the plasma in the sun .

If we model the electrons in a metal as free, we can get nice expressions for the relative permittivity and hence reflectance. Above the plasma frequency (usually UV), the reflectance falls from about 100% and metals become transparent. We can also develop expressions for relative...

Homework Statement I have done a lab consisting of measuring the ion density in a flame plasma (super-hot flame). A "biasing voltage" was applied directly to the flame (via the burner), and I was wondering what is the difference between a non-voltage-biased flame plasma, and a voltage-biased...

Where does the heat come from? What pushes the atoms together?

I'm looking to find an expression for the Faraday rotation of a wave in a magnetized plasma, propagating parallel to a magnetic field. It's more math help than physics help I need here though. I know that I'll have to start with the dispersion relations for a right and left circularly polarized...

Why is the plasma frequency and the relaxation frequency expressed in eV instead of Hz? eV is a measurement of energy, not frequency. What is the plasma frequency, relaxation requency and Debe length, and how are they all related? Thanks, Ninja

I'm exploring an idea for a MHD generator. This may well have been done before but I can't find that much about the subject online so I would appreciate input from PF people. Assume that a plasma 'ball' is flowing along the axis of a tube, which is surrounded by electromagnet coils. The...

Just curious what topics you would consider essential to understanding plasma physics. E&M seems obvious, but what else would you call prereqs?

Hello everybody. Im starting a project on the basic processed undergoing in the edge plasma region. ( I mean, near the walls of a plasma confining device, like a tokamak or so.) I was wondering if you could name some ''things'' I should be aware of in order to make a small PIC code or...

So is it? I had a long discussion about it in school and the internet gave very mixed answers. Because we are wondering if fire is ionised and this magnetic?

What is the lowest temperature plasma we can make? What substance is it.. what is the temperature it becomes a plasma (ions brake loose (?)) ? And what is the theoretical minimum - or even is there a limit? From what I know it depends on how strong the bounds are and how well the electrons are...

Okay so here is my question. I want to work on ion based propulsion in particular plasma propulsion. I'm currently finishing off a degree in Space Systems Eng. and I'm wondering where I should go from there. I would think that a second degree in physics, chemistry or electrical engineering...

Hi to every one I want to simulate Rf lab plasma and DC glow discharge plasma But let me make clear one thing Consider me as a starter to both plasma physics and simulation So is there anyone who can help me in this respect to guide me from zero Regards

Hello, I didn't got an answer in the thread I posted this, so here I go with my own thread..:) I got informed and read that the ionization of the air highly depends on the different wavelengths of the beam. About the short wavelengths was said that they are 'ionizing' and about the long...

It's an intro plasma physics course, and already starting to get to me... I'm asked to derive an expression for the drift velocity of a particle in a constant uniform E-field, and a slowly time-varying B-field. I've looked at a few books to see if I can even find the final result, so I...

So I friend of mine got into this interesting discussion about different kinds of plasmas in particular the various colors andhttp://en.wikipedia.org/wiki/Plasma_parameters" of various ions (*mainly magnitude of frequency and velocity equation). One interesting question we both had was about...

Hi everyone. I am interested in studying plasma physics, but not so much in studying nuclear fusion. Is there a market for plasma physics research that is not geared toward nuclear fusion technology? Thanks

Most of the plasma we see in everyday life is more or less blue (lightning, plasma lamps, static discharges through air etc etc). But if I understand correctly, plasma can be in many colors. Like the plasma atmosphere of the sun, which as far as I know, is not blue. What makes the usual plasma...

I'm after any information, figures, etc. relating to resistive and reactive loads in ICP plasma systems. Particularily in the pressure range of 10 to 100 millitorr (or thereabouts), for various gases/mixtures. Information relating to CCP plasmas will also be welcomed. I've received...

I want to keep all the species and radiation from plasma but not UV. Is there a way to design plasma source in a way that there will be no UV coming out?

Ive been wonder how big a laser would have to be to make plasma. So, how big? if its not possible is there a variation that would produce plasma? Thanks, Kalrag

Hi, Suppose there are two plasma cases, conditions are the same, except for the gases present: a-Oxygen b-Nitrogen Since the dissociation energy of nitrogen is higher than oxygen, what could be concluded from it? Could it be more energetic nitrogen ions than oxygen ions (because initially...

is it possible to make a cold (room temp) charged gas? would be nifty to use in a heat pump. instead of using compressors you could use fields to compress and decompress the gas

I'm trying to study concepts of fusion...please help in any means possible...Currently I'm studying freidberg's plasma physics but want to know more...