Plasma Definition and 618 Threads

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...

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...

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...

I am attempting to devise an experiment to test exactly how successfully plasma can be manipulated by a natural magnet. Ideally, the gas to be ionized would be isolated in a vacuum tube, where it would be subjected to easily producible electromagnetic waves, either microwaves or ultraviolet...

What would be the outcome and what speeds would be needed to create a reaction?

Nice posting by Bee Hossenfelder on her Blog !.. http://backreaction.blogspot.nl/2013/09/whatever-happened-to-adscft-and-quark.html A decade ago, the AdS/CFT correspondence was celebrated as a possible description of the quark gluon plasma. RHIC measurements of heavy ion collisions at that...

Say I have a volume of hydrogen gas that is raised to a temperature T so that 99.9 percent of the gas is ionized. If now, with the plasma at some pressure P, the volume is compressed a small volume dV such that no energy leaves the volume I'm curious of a total accounting of where the energy PdV...

Need Help Fixing Plasma Tv... Please? Got it for free it a samsung pn50a450p1d. The tv works fine except it screen color is pink with a little haze, can this be fixed?

Hi all, I am an aspriing Fulbrighter looking into universities in Russia and Europe. My intended field in graduate school is in plasma physics and I have already had some research experience in plasma. I was wondering if there are any universities in Russia that have decent plasma physics...

hello, new to site. This is my first post. I just was wondering what any ones thoughts were on using the carbon, nitrogen, oxygen cycle in a dense plasma focus device to produce aneutronic fusion power.

If the sun is producing plasma on a large scale on a regular basis, isn't it then true on a smaller scale that we could use the UV Rays of the sun to produce plasma by smashing two magnified rays and liquid hydrogen together in a high speed chamber? The result would be hot plasma that could be...

Hi, I am into my pst graduation in Physics. And I would like someone to guide me in ho w to master this subject from basic level to the advanced level. What are the main topics one should know very well to start over this subject. It's applications as well. Thank You!

I was wondering which specific physics courses I should take while still in undergrad if I'm interested in experimental plasma physics (and might study it in grad school). I've taken all the intro courses for the major branches (electro theory, mechanics, QM, optics, thermal physics...

Hello everyone, I want to create a plasma chamber, and so far, I have a vacuum bell. I have a couple of questions... excuse if I have the terminology wrong. I would like to create a plasma, and then apply a DC magnetic field, so the electron cloud "separates" somewhat from the gas. I have...

Hello all, I was wondering if it takes less energy to sustain an already ionized gas with an electric arc than it does when you are first trying to ionize the gas. I would think it would be, but I am not sure. Thanks.

I've been given a practice question for an exam and I can't quite get it started. The question is: Intelligent beings on a distant planet try and communicate with Earth by sending powerful radio waves swept in frequency from 10 to 50MHz per minute. The linearly polarized emissions must pass...

Hello all, I was wondering if the temperature of a plasma is relative to how much of it there is, or if it is purely based on how much energy is put into it? Thanks.

http://postimg.org/image/d530nwobf/ those are plasma arcs emitting from the gun no? Ionized air?

now even though I searched the forums for keywords and came up with none exactly matching my case excuse me if this has been asked. Firstly is it possible to have a high pressure but low temperature self sustaining plasma? i do understand that temperature corresponds to the plasma particle...

What are the various methods by which plasma can be prepared? And is there any method by which it can be prepared easily?

Hi. I have a problem. as you know,in a plasma medium(such as cylindrical tube),we have: εr = 1- [ ωp^2 / ω*(ω - jv) ] that : v = collision frequency ωp = plasma frequency but I don't know meaning of " ω " ,exactly. ω is RF feed frequency of plasma or incident wave frequency to plasma...

A possible breakthrough for space travel, yet lacking an explanation in physics, they say. http://ntrs.nasa.gov/search.jsp?R=20140006052...

Hey there, I was looking to buy a plasma globe as a desk ornament at work. Problem is, I deal with circuit cards and other pieces of electronic equipment. None of us wear ESD bracelets, so the components aren't extremely sensitive. I was just wondering if the globe would emit a strong enough...

Life based on carbon needs very especial conditions to thrive, life on Earth is a clear example of that. Lots of time and research have been dedicated trying to find carbon based life elsewhere on the Universe, but that search may be too narrow because that search assumes that life can only be...

Hi everyone, i recently saw some videos were a microwave laser (gaser) was used to create a plasma in midair. So the first part of my question is, if you could handle the ray fast enough, could one print 3dimensional-layered plasmastructures into non-disturbed atmosphere? If no, what did i not...