Plasma Definition and 618 Threads

Hi, I've seen a video of the US navy test firing a rail gun and in the video there is a plasma plume that follows the projectile. I am unsure of what exactly is causing the plasma plume... specifically: Is it the electrical energy passing through the rails that ignites the air and...

Greetings: I am currently in the research phase of a project. I would like to get some feedback, opinions, and supporting data/information concerning the feasibility of a small volume (less than 1 cubic meter) plasma container device that would ideally be used to store energy up to 100...

I read the book Physics of The Impossible by Michio Kaku. It was there I first heard of plasma windows and I was like "hey that's like Halo and Mass Effect". The problem with plasma windows is that too much energy is needed to make it and that it would vapor your spaceship or soldier if you used...

I have been working on a circuit (similar to car ionizer circuit) for a pulsed plasma thruster, which is able to charged up a capacitor to voltage as high as 1.8kV. I have a diode which is able to block reverse voltage up to 2kV interfaced between the charging circuit and the discharged...

Hey does anyone know where I can access some of these either for free or if my school has a subscription then I can access them on their network. I will be joining a research group soon on the simulation of heat transfer in a tokamak and would like to be up to date with the literature.

Could thermite be used to bring certain types of matter to a plasma state? If so what materials would be easiest to render into a plasma? Inspired by the german experimental shockwave cannon from WWII... I got to wondering. If a 3 layered charge were used in such a weapon, one layer a...

Hello! Electric force is inversely proportional to the dielectric constant. In a textbook, this is said to be forty-fold greater for water than the phospholipid membrane. As such, ions are unlikely to cross the plasmamembrane. I assume this has something to do with preferring to stay in...

I am surprised by the result when I estimate the specific heat of the plasma produced by heavy ion collisions in the LHC: C(plasma) ~= 2e5 J/(g-K) (Details below.) This is ~1e6 times greater than C(lead)=0.13 J/(g-K) (1). Did I make a mistake? If not, can the physics experts who read this...

I'm using comsol 4 for plasma modeling but I've read that this module is just for low temperature plasma, does anybody knows the temperature limitation of the plasma in this module? I mean how much is the upper limitation of plasma temperature?

Where can I find a list/chart of the temperatures at which elements reach the 4th state of matter known as plasma?

How exactly is plasma generated when space vehicles reenter Earth's atmosphere? How do the ions show up? I get how the air drag creates the initial heat, but from there I do not know. Have been searching the net for about 30min and came up with nada.

I have a question about plasma and its temperature: Which plasmas are hot plasma and which are cold plasmas.For example ionosphere ,Lightning,polar aurorae etc.

Hi, I need a book about laser plasma interactions for my thesis. I'm reading P. Gibbon book "Short Pulse Laser Interaction with Matter" and further reading the autor suggests to use Kruer book "The physics of laser plasma interaction". This book is not available in my university and before...

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

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...

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.

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.

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...

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...

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

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?

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

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 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