Plasma Definition and 681 Threads

I need to find the correct voltage to apply to a wire grid in order to repel a plasma of which I know the density (free electrons per volume) and the particle energy in eV. I see a Debye sheath as being analogous to what I will create with such a charge. The way I see it is that I will have...

what are the differences between plasma and ionized gas? Thanks

I am an electrical engineering student doing my third year. I am interested in doing research in making fusion energy a commercial energy source by doing research in current techniques and also interested in creating new techniques for making fusion process continuous and efficient than...

Impact of magnetic field on a "dirty" plasma. This follows on from an earlier post of mine, which is now closed. I can also now disclose that it refers to my UK Patent Application GB1312183.5, which claims (in essence) that a linear motor can be used as a compressor for a jet engine. That...

(Wasn't sure on the right section for plasma physics, I apologise if this is wrong).I'm reading up right now on a plasma surrounded by a tokamak wall, and the assumption of ideal magnetohydrodynamics - which assumes very little internal electrical resistivity and so the plasma can be assumed as...

So far I've only found some leads into the use of magnetohydrodynamics theory in designing liquid metal cooled reactors. Anyone know of any other topics?

I currently have a 40-in Sharp LCD Aquos (5 years old) and I want to upgrade to a 50-in or 60-in LED or Plasma TV. My 40-in Sharp has a very clear picture when using the HDMI inputs. I am looking at Samsung, Panasonic, LG, and Sony models. Won't the picture (that I am used to on my 40-in screen)...

I'm a Physics student in the UK planning to apply for a PhD in Plasma Physics this autumn, in the area of Magnetic Confinement Fusion (MCF) specifically. The UK has a rather limited MCF university network, with only 3 universities playing a significant part. Two of these, Oxford and Imperial...

I know that fermions and bosons can thermodynamics can be calculated via the Fermi-dirac or Bose_Einstein distributions, However I've been having difficulty finding the EoS (Equation of state) and thermodynamic distribution metrics for the quark-Gluon plasma. So far I have the following...

if we have 3  plasma ball.and they have the same pressure gas ...one have low current power .the scond have  middle current power .the third have strong current power .. ...so which will of them produce ...light ..plasma ...spark..

HEllo all, I'm a student who has got selected to study KTH, Royal Institute of Technology Sweden. I will be studying, space and plasma physics and space technology. I'm a non-eu student. Because of that I have to pay 16500 euros which is totally out of my reach. I applied to Swedish...

What happens when a electron travels through the plasma? Would it be likely that most of the electrons hit a nuclei or not? Would a beam of electrons work like a current through the plasma? Can you send electron beams with different voltage, and would it matter? In a hot plasma it's...

I keep coming across the word apical and basolateral membrane in my study of plasma membranes of cells. I am wondering if the apical membrane is towards the inside of the cell (cytoplasm) or towards the outside ?

Question about plasma membranes... I read this online and am wondering if this is true. It said that - "When you think about a membrane, imagine it is like a big plastic bag with some tiny holes. That bag holds all of the cell pieces and fluids inside the cell and keeps any nasty things...

Hello Physics Forums! I've been educating myself on electrostatics, electronics, and electromagnetics and I have come to the topic of plasmas. I understand that plasmas are essentially charged gases - but their behavior is so disparate from regular gases that they are classified as the fourth...

Guys can you please tell me how fast/slow Alfven waves propogate in High/Low Beta Plasma? I need to derive equation cannot find any clue on that! Please be so kind to help me please!:rolleyes:

Which has the best program/research in plasma physics? I would have said Wisconsin but Alcator CMOD got its funding back this year so maybe MIT? I am talking about either the engineering or physics departments, doesn't matter.

I have been reading a patent by Gene Meeks of a plasma multipactor. Meeks was the right hand man of Philo Farnsworth the "father of television" and worked with him on the 'fusor' - a small nuclear fusion device. Meeks's multipactor appears to be a self sustaining over unity power device...

Hallo Physics Forum i was woundering how to make hydrogen plasma, i think i cloud be done simple by applying voltage though the gas, though i don't know how much voltage i whould need or is there a better way of duing it ?

The way I understand plasma is that is almost a gas except some of the electrons of separated from the nuclei entirely making positively charged. Is there a temperature in which Iron is by definition a gas, and not a plasma? Also, can something like a noble gas become a solid?

hello I need to know about return current formation at beam plasma system, in a simple way. how It is formed?

In some texts about plasmas, the plasma oscillations are discussed at the extreme of no Thermal motion. One example is the one in wikipedia: But I can't accept that approximation.Because it is assuming that we have a kind of motion called thermal motion and other kinds which arise from other...

At what temp does nitrogen becomes plasma? What about oxygen? I am using a spark gap to turn air into plasma, I was wondering what temp is the air that the spark gap is flying through? Does the air in that area keep getting hotter and hotter the longer the spark gap is present?

Most ideal light radiates uniformly in all directions. It means that for each photon, the probability of each direction is the same for a single photon. The specific optical resonator design enables a laser beam to propagate in one definite direction. Could anyone tell me what modifications does...

It says DC in 12volts but I'm not sure how many amps this thing can handle... I don't want to plasma myself so I was looking for helpful answers, thanks guys pic of globe (paid $8 not bad) http://postimg.org/image/462gwlj5v/

Hello all, I've been examining plasma physics and electricity (or at least trying to with a search engine) and have a few questions. 1. Can plasma be polarized? For example, if a magnet is placed with the "north" polarity near a magnet, will it maintain that shape? 2. If a wire carrying an...

Author: Francis F. Chen Title: Introduction to Plasma Physics and Controlled Fusion Amazon Link: https://www.amazon.com/dp/1441932011/?tag=pfamazon01-20 Prerequisities: Introductory physics, modern physics, calculus through PDEs, E&M Contents: Undergraduate, upper level; Graduate...

Hey all, I'm looking for a good introductory book (I've had Physics 1 and 2, some thermo and modern) on plasmas because I will be doing research this summer in plasma physics. I have heard Francis Chen's "Introduction to Plasma Physics" is a good start. Any reviews on this book?

Homework Statement Use the continuity and momentum conservation equations for a single species to construct the following "convective derivative" equation for the fluid velocity: \frac{\partial\vec{v}}{\partial t}+\vec{v}\cdot\nabla\vec{v}=\vec{g}-\frac{1}{\rho}\nabla p...

I'm looking to create a plasma actuator. I have a 1/16" thick aluminum oxide ceramic plate that will function as my dielectric, as well as two copper electrodes that I'll be sending the electricity through. Does anyone know how much power I will need to send to the electrodes to create the...

Is here some people who knows something about dense plasma focus fusion technology? I`m interested to know how main problems of the technology are supposed to be solved. For example: 1) if it is assumed that pinching device supposed to be surrounded with ambient deuterium gas,then how heating...

Hello. I didn't count examples about plasma at school. Never yet. I'm trying it study on my own. I do not know what to do with a few examples. I do not know which formula to use. I give here one of them. Calculate the resistivity of hydrogen plasma at 1 keV. How can I do it?

I have a question. In an electric arc, the electric current going through the air makes a visible plasma arc as so: http://upload.wikimedia.org/wikipedia/commons/7/7a/Electric_arc.jpg My question is this: Could a high power laser create a visible plasma channel through its path. I ask...

The context of this question is looking at straggling in plasma. I was told there was a simple differential geometry relationship between the following entities: dE/dx, dE/dy and dE/dt, where x,y are distance in perpendicular directions (axes on a plane), t is time and I'm using E to...

I just randomly thought of this topic one day and was curious since. Is it possible to use a plasma jet and make a "plasma jet" with the plasma from a neon tube? Please explain why and maybe how?

Is there such thing as plasma fusion if so how does it work?

Hi everyone, my question is: what information can someone get by just looking at the colour of a plasma? I the elements inside the chambers, together with some(few) common impurities. Using the common spontaneous emission formula i can guess what transition emitted light with a particular...

What problem arises or may potentially arise if drug molecules bind to plasma cells?

Abstract The proposing Method unlike to using now others comprises in usage for plasma creation and its further ignition the created in-situ halo-layer of high-energetic particles to the puffed gas. For realization of Method the following procedures should be performed consistently and...

The consensus among a number of my (undergrad) peers is that the field of plasma physics is relatively dead and that nothing ground breaking has been done a long while. I would have liked to go to grad school for this but not as much if this is true.

Hi there are two frequency of plasma. the first one is electron plasma and the second one is ion frequency. I want to know in freeman or bernas ion sources are using which one of these frequency to collision the gas and provide plasma and waht is the reason of that.Any help would be appreciated.

I was watching some well know professor giving speech at "CERN" about plasmas and he said like quote: "Plasma frequency , which is a characteristic frequency of the electrostatic oscillations in the plasma , depends on the square root of the plasma density" So by that could I assume that the...

Hi, I am an EE studying some plasma physics. I am doing alright with it, but this question cropped up in my head a few days ago, and I've come to find out that most text-books don't devote a lot of time to it. I am interested in microfabrication, and plasma reactors are central to a lot...

Solar Winds, Space-Aged Propulsion & Plasma Beams? Hi there I'm educated the field of electrical systems & radio frequency, and I love reading about things like ion drives, hall effect thrusters and VASIMR. One thing I find quite fascinating is how the solar winds accelerate away from the sun...

I frequent this website occasionally, but most of the projects on it aren't nearly as outreaching as this one appears to be. http://www.kickstarter.com/projects/2027072188/plasma-jet-electric-thrusters-for- spacecraft ?ref=category It's basically a group of 3 scientists trying to raise...

I'm currently in my final year of an aircraft propulsion PhD and have become passionate about plasma physics, due to its fluid like similarities. I find engineering too-well-defined for my liking and would like to research in a less well defined field, i.e. physics. I am considering taking a...

Quark-gluon "plasma" I understand that recently an estimated temperature of 5.5 trillion K was achieved at CERN. The phase state is described as a frictionless liquid. Is it still a plasma since the term continues to be used? Also, up to what temperature is QCD considered valid...

I'm only a sophomore physics major, but I'm beginning to consider what I may want to study in graduate school, and hope to find some REU's that will complement these interests. I'd like to hear from others who are in the broad field of plasma physics. I'm back and forth between geophysics and...

Hello all I've been reading about the quantum vacuum plasma thruster. On the surface it sounds great. My question is, well, is it legitimate? I don't have the expertise to give it a yea or nea. Could someone who knows what they are talking about give me an answer. It seems like a miracle...

How much energy does it take to make plasma?