Plasma Definition and 681 Threads

not sure if this is in the right section but... What exactly causes plasma to reach such high temperatures?

A complete set of lecture notes for a graduate plasma physics course. Topics covered include particle orbit theory, fluid theory, wave theory, MHD theory, and kinetic theory. by: Richard Fitzpatrick (University of Texas)

I am still trying to get a handle on plasma behavior, if I had a gap intended to apply a field for the purpose of compressing a hydrogen ion stream, using the Z-pinch effect could one discharge a current through the ion stream to affect the Z-pinch? I am thinking that it would, that the...

what is the concentration of blood plasma under normal conditions?? how do you even begin to answer this question HELP!

Hi, I'm studying plasma waves now, and we have talked about waves in class that have phase velocities faster than the speed of light. For example, some of the waves from the Appleton-Hartree dispersion relation have this characteristic. I asked my professor about it and he said that is...

I'm having a problem understanding QGP. Hadrons are bound states of quarks which interact by interchanging colour. Now, as I understood we haven't observed free quarks because the force rises by distance and that force is really strong. As I read in QGP quarks and gluons are not bound, you can't...

I'd heard this was a relatively newer discovery -- that a blunt-body object traveling through a gas experiences a reduction in drag if that same gas is turned into plasma. I'm haven't read exactly why this occurs, but I'd presume that a gaseous fluid medium becomes easier to pass through if...

I found a video called "how the sun really works" on youtube. Link: http://www.youtube.com/watch?v=ihVaL-FHUyk" Well. This did not make much sense for me. Is there something to be debunked?

Hey everybody. I heard a physics professor at Berkeley say that normal fire (from a lighter) is plasma. My science teacher at high school says that it isn't. So my question is, is normal fire in state of plasma or not? Thanks.

Hi, Let's consider a plasma of 3 distinct populations : 1 cold proton population of 0.2 density, 1 hot proton population of 0.8 density, and one electron population. I have T_i=T_e and I set the velocity of my cold population to 0. I expected that te energy of my hot proton population to...

The electric universe http://video.google.com/videoplay?docid=4773590301316220374 many claims that challenge main stream cosmology.

I'm not sure where to put this, Its exactly what the title says: this one shows the grape more clearly, starts properly about 1 minute in, and also quite long sustained plasma with a match, Plasma from a grape! any ideas how? or is it fake? also if you watch any of the other similar...

Below is a post to sci.physics. It proposes just storing ionized gas for fuel for ion drive engines rather than using the power on board for ionizing the gas as well as accelerating the ions. My question is what kind of power would you need to contain a fully ionized gas using magnetic or...

I know that confinement and stability are a big issues when it comes to harnessing fusion power in a controlled fashion, but what if we could do away with the stability constraint? (sorry if this is completely unfeasible, I don't really know very much about plasma and discharge physics). My...

hi friends m a student and want to lnow how xrays are emittted from labortary plasma and xray emission dependence on the atomic number of target from which we are creating plasm.explain me with refrence to the shells thanks take care

If plasma is a collection of positive ions and electrons, why don't they recombine together and become neutral?

Recently I read the thread "Giant Solar Laser" in the General Astronomy Forums. The author, Ruslan_Sharipov, writes I was just wondering if someone could explain specifically how a laser will be amplified when passing through plasma. Thank you for your time.

I'm going to buy a new television and I'm torn between two models: Panasonic 42 inch plasma TV 2007 model (TH-42PV70) or the Sony 46 inch Bravia LCD TV (KDL-46S2030) They both are the same price (after 250 EUR rebait from Sony), but the LCD is 4 inches larger. In the store both look...

I was staring at my calculus book when this came to me, so apologies if its a little murky. I've been thinking about Hubble time and noticing something odd, that my astronomy professor really couldn't (or wouldn't) answer. t(u)= 1/H x 10e12 years which didn't quite work because if the...

Does anyone know where I can find measured values for the plasma frequency of bulk silver? I would like them to be for light in the Terahertz range. I have looked in all type of book of optical constants and I have searched many different articles. Just a suggestion of where to look would be...

Hi Guyz, Why the results in the paper I've attached aren't like the results I got in my pdf? Please look at the paper in the last line, the second term doesn't correspond to what I calculated, What i calculated is in the pdf file, is it wrong? Why in my work there is exponential terms...

I used to work with a ICP instrument for a while. There's a phenomenon which I tried to explain but it seems not clear enough. In the instrument, just imagine there are a vacuum chamber and a plasma torch. The vacuum chamber has an inlet with a diameter of about 1mm. If the plasma is off, the...

I've been doing some reading about both hot and cold plasma, when I had stumbled upon on article talking about a plasma window. [ http://en.wikipedia.org/wiki/Plasma_window ] The article goes on to mention a plasma valve. Now, from what I understand - a gas is ionized (turned into plasma) and...

proposed plasma technology...will it work? Plasma-Assisted Cutting (PAC) rounds Hello everybody. I have a conceptual idea for a futuristic plasma-based weapon that may be used by the military in the future, if it can actually function. The idea basically is, that a gun fires a standard...

http://www.teralab.co.uk/Experiments/Plasma/Plasma_Page1.htm" Check this out

I have a question regarding plasma .Suppose i heat a certain amount of dioxygen , O2 , which will first easely break into oxygen and after come to a point where at least 1 electrons gets free of the oxygen atom and hence the substence become plasma according to the definition. Now , if i keep...

Hey all. This is somewhat off topic, and so if it needs to be moved, just let me know where to. Recently while toying with my plasma globe I noticed something I'd never seen with it before. For those with plasma globes, check it out. The procedure is as follows. Take your finger, and very...

My teacher said nothing but I don't believe that. Since heating has no limit, and the more you heat, the higher the energy level rises, the bonds break, if you keep increasing the temperature, something is bound to happen.

i have pre-master degree in plasma physics my grade on BSC was Excellent i hope anyone help me to get agrant to have my MSc I'm in Egypt graduated from alazhar university please ! how to get these grants thanks for all! :!) :!) :!) :!)

A gas has some pressure due to simply its heat. However, if the some or all of the molecules are ionized it will also have some additional pressure due to the Coulomb repulsion of the molecules at the same charge. How do you calculate the total pressure depending on the proportion of ionized...

This is definitely the field I'm most interested in. Does the outlook look good for the field? I would think that with much of the country more than open for energy alternatives, this field would be one with a bright future, but I don't hear much about fusion research in mainstream.

I'm interested in the general topic of the luminosity of plasmas. I would expect that this topic would come up most often in astrophysics, so that's where I'm posting the question as to get the best shot at getting an answer. I'm interested in applying the information in a rather unusual...

I was wondering if it would be fair to say that the frequency at which x-rays start to penetrate a metal would be the plasma frequency associated with the electron density of the metal, i.e. the frequency given by http://scienceworld.wolfram.com/physics/PlasmaFrequency.html or whether some...

from wikipedia: "a plasma is typically an ionized gas, and is usually considered to be a distinct phase of matter. "Ionized" in this case means that at least one electron has been dissociated from a proportion of the atoms or molecules." 1. Since electrons has been dissociated only but not...

Can a monochromatic plane EM wave exists in a plasma when \omega is less than \omega_p (the plasma frequency)? If so, is it attenuated? I read in a text that a wave incident on a plasma with \omega < \omega_p is completely reflected, but does this mean such a wave can't exist in a plasma? If...

Wikipedia - http://en.wikipedia.org/wiki/Plasma_Physics And other references - A nice introduction, including history, to Plasma Physics http://farside.ph.utexas.edu/teaching/plasma/lectures/lectures.html and more sites on Plamsa Physics, which include applications in...

Hi all, I'm currently taking a course in introductory cosmology, last quarter I had an introductory course in plasma physics. Something that's been bothering me through the course of my cosmo class is the fact that plasma effects are entirely ignored even though it's acknowledged that, for...

If we have two Plasmas, One Positive and one Negative. Both Plasmas are Hydrogen based, One Electricaly Charged (Neg) and the other stripped of it's Electrons (Pos). The Positive Plasma is contained in an ideal insulated Box #1. The Negative Plasma is also contained in an ideal insulated Box...

What is Stark-broadening theory? Does it have something to do with mean free time or mean free path? How does this effect spectroscopy? How does plasma polarization shift based on the quantum-mechanical impact theory work?

I've recently found my old plasma ball, so decided to waste a couple of hours becoming entranced with it. I noticed that if I touched it with anything other than my hand, the streams didn't seem to be attracted to it. I did a bit of reading on it and found that it has to be something which will...

I've got an understanding problem. It's about the behaviour of charged particles in plasma inside of a tokamak. It says that a particle in the non-homogeneous magnetic field (toroidal field), moving on the spiral trajectory all along the magnetic field lines, tends to drift downward (for...

HI and Hello, i would like to simulate a plasma discharge (z-Pinch discharge) with the Femlab Software 3.1i. The resulsts should be the density of the plasma or the temperautre after a compression. As input parameter serves the measured time dependent current. I have tried the...

In yuor opinion what is most likely to be the most used type of weapons in 50 to 100 years. Projectile, laser, plasma, etc.

i am curious to know, what is the difference (if there is) between plasma TV technology and LCD? my friend asked me this, and i said they are probably the same. are they?

Is anyone familiar with modelling plasmas around here? I'm doing some homework and shopping around about what kinds of simulation models there are. Apparently there's a vast variety but I can sort of see there're 3 types: 1. particle-in-cell models 2. hard core Boltzmann solvers 3. "run...

ive been bored so i was lookin for experiments to do for summer break and i came across one on making making and containing plasma... looks fun... but my question is, will i die or something? and what are some of the dangers besides the heat from thee stuff in the microwave... heres a link to...

Has anyone taken a an undergraduate course in plasma physics? If so, what text did you use and how did you like it? I need a text for plasma physics because: 1) I'm taking the course next semester and the professor doesn't use a textbook and he's also apparently a horrible teacher, so I'm...

I need a text for plasma physics (undergrad level) for two reasons: 1) I'm taking the course next semester and the professor doesn't use a textbook, but I learn best from books so I'm buying one anyway. 2) I need a good plasma text to learn/refer from for my job this summer. I was hoping...

Say that you are continuously creating plasma with some sort of sparking device. How strong of an electrical field is required to keep this air in its ionized state, compared to the field needed to ionize it initially?

Can someone explain to me what this is? All we were told in my Physics of Stars module was that for a plasma, L \gg \lambda_{D}, where \lambda_{D} is the Debye length. We were also told that it's an "e-folding distance" for a potential, but that doesn't help to understand it. I'm not...