Plasma Definition and 681 Threads

Thank you for opening my first thread. I have just began studying Physics at a university in Hungary and would like to get some information about Network Science and Plasma Phyics/Nuclear Fusion. I am looking for a branche in Physics in which I can do research in the coming years and get a job...

I am not a scientist, but as a hobby I am summarizing different initial condition theories, specifically, eternal inflation, LGC, cyclic, and bounce theories. I need a completion time ATB where all theories produce an identical plasma. The plasma then enters the big bang process of expansion...

Homework Statement The blood that circulates in our body is about 1/12 of our mass. If the kidneys filter 7.5 liter of blood a hour, then how many times does it filter in the kidney the whole blood of a person will mass 60kg? Homework Equations 1/12*60=5 liter blood The Attempt at a Solution...

The blood that circulates in our body is about 1/12 of our mass. If the kidneys filter 7.5 liter of blood a hour, then how many times does it filter in the kidney the whole blood of a person will mass 60kg? Here's what my teacher did: 1/12*60=5 liter blood 0.55*5=2.75 liter plasma of blood. The...

Hello everybody, I was looking for ways to amplify magnetic fields for some project, but I happened to stuble upon articles about plasma thrusters. And seeing how a magnetoplasmadynamic thruster works, I thought: either this is really easy to make or I'm missing something. Now bare with me...

I want to do an experiment for a presentation for a medium amount of people. How can I create plasma to show off to them?

I observe that electric arc forms a curve. I think that this is because electric arc is extremely hot and hot air goes up because it has less density. So if electric arc occur at 0 gravity would it be straight? from wikipedia https://en.wikipedia.org/wiki/Electric_arc Thank you.

Homework Statement Hi! I have trouble with calculating the upward and downward plasma speeds. I have the necessary data and an equation that is useful (I think), but I'm stuck. Homework Equations The shock jump number Zs=3 in this case , and I've calculated the shock wave speed (555 km/s)...

My question is about Force Free fields in the study of plasma stability (in MHD regime): Consider an isolated ideal plasma in an equilibrium state (where the effect of selfgravity is negligible), from the Navier-Stokes equation we get that: $$\vec{\nabla} P = \frac{1}{c} \vec{J} \times...

A magnetic field doesn't penetrate well into a plasma because it produces currents that counters the field, so to speak. But, before those currents are produced, does the whole of the plasma "feel" the magnetic field? For how long; ns, us or ms? S.A.

Hello all, This might sound very optimistic for a project but I want to design a thermonuclear fusion reactor. Does anyone know how I can calculate the required plasma current I need in order to start a thermonuclear fusion process? I am using a mixture of Deuterium-Tritium gas. Thanks!

I'm trying to understand the mechanisms of the anisotropies in the CMB. The general idea is that there are fluctuations in some field (e.g. inflation) and the baryonic and dark matter rush into the space compressing the fluid. The photon energy pushes back on just the baryonic matter while the...

Let's say we have a plasma of protons or deuterons and electrons; how thick is the 'shell' that the nuclei form in momentum space compared to the 'shell' formed by D2 or H2 in a gas, at room temperature? Will the distribution of momentum be more spread out or more compact, so to speak, in a...

this question might be a bit stupid, but if the plasma in the fusion reactor has very high temperature, then how do we make the chamber not melt? i mean, not to join? contact? each other(chamber wall and plasma). do we use magnetic field to make the distance? then how do we do that?

Recently, Germany broke headlines when they fired up their nuclear fusion reactor. As I'm sure most everyone on this forum knows this, they plan on creating fusion by heating plasma to absurd temperatures while containing it in a magnetic field. What method do they use to heat the gas and...

Hello, I am a new member here at physics forums and find myself unsure of how to go about pursuing my career interest in nuclear fusion research, and if it is even something I should be pursuing at all. My goal is to some day work in fusion research, but everyone I have talked to about this...

I was reading a paper recently about guiding electric arc discharges with lasers. http://loa.ensta-paristech.fr/ilm/uploads/ILM/134_Forestier_discharge_AIPAdvances_2_012151_2012.pdf Since electric arcs are plasmas and they seem to be stabilized by lasers, could the same principle be applied to...

phase diagrams show the change of the state when temperature or pressure are modified. to achieve this, is necessary heat, but my questions is: would plasma state be described in this diagrams? is this figure true? because plasma state can be generated by heating.

What gives it this property?

I have been intrigued by reports over the years from witnesses who claimed (at various sites) that before a particularly severe earthquake, that unusual atmospheric phenomenon that would seem to be best described as various forms of plasma (super heated gas) were seen. Is this something accepted...

So, assume you have a plasma in a vacuum made of an even distribution of 50% electrons and 50% protons all flowing in one direction with low collision frequency. Then you suddenly turn on an external magnetic field and watch what happens. How will the plasma react? Will the magnetic field...

Let's say we have a mol of hellium-3 and we heat it up until it becomes plasma. What happens to the neutrons? Wikipedia does not mention anything about them. It only says that "Plasma is loosely described as an electrically neutral medium of unbound positive and negative particles". Just to make...

Hello all, quick question: When Plasma cools what state does it return to? Is it a liquid or the state it was in before at room temperature? Do the atoms rearrange into what it was like before i.e. the same element or something completely different? Thank you

I am going to presenting on a scientific report and the report that I choose (this can still change) is the following: http://onlinelibrary.wiley.com/doi/10.1029/2001GL013014/pdf In this report, they ask the question of what produces what? Does plasma flow produce an electric field? or Does an...

I am interested in applying plasma physics in nuclear fusion program in France or Germany . Both are good in this field , but where i can get good scholarships and i am from electrical engineering background so where i have better chance of getting admitted.

Thank you for opening my first thread. I have just began studying Physics at a university in Hungary and would like to get some information about Physics of Complex Systems and Plasma Phyics/Nuclear Fusion. In my life, finding a goal have always helped me work harder and focus on my studies...

Hello everyone. I am new in this forum. I am from Turkey and I want to go abroad for Ph.D. but I have concerns and a lot of questions in my mind. My GPA from BS is 2,98/4 (I know it is not good). This year my second year my master. Probably I will graduate with 3.50-4.00 GPA. My master...

Does plasma transport oxygen?

I was wondering , because all I know is that we got solid . Heat it up enough and you get liquid . Heat that up enough too and boom ! There's gas . Plasma is another transformation in this category , in this case , about heating up the gas enough . And I wanted to know , if there is anything...

Hi there i wonder how can i measure the plasma temperature ? and what is magnetic field have the impact to plasma or not? Thank you all.

I am developing a math model to describe laser ablation process considering the plasma. My supervisor want to know the exactly difference between the laser induced breakdown and laser induced plasma. After a lot search, I personally think that the 'breakdown' is the first step of plasma...

Hi, I don't know if it's the right place for this question, but- I need to create a satellite model, that after being in space, will come close to the atmosphere, and then go back up again. In its way up it need to use a pulsed thruster. (This needs to happen multiple times...) Does a pulsed...

Hello, as a software engineer I am used to having industry specific trade journals from ACM that discuss Operating systems, genetic algorithms, neural nets, etc. ... Are there any equivalent ones for physics that covers fusion plasma and it's topics such as electromagnetism, superconductivity...

Hello, I have been doing software engineering for over 20 years and I feel like it's time for a change before I get too ancient. I have been following and reading about plasma fusion for a number of years now and I would like to study this and be able to do some research in either a Ph.D...

Why do all wakefield accelerators seem to use either electrons or positrons? Is there any reason you would have difficulty creating a laser driven proton plasma wakefield accelerator? (that is, in comparison to an electron accelerator) Thanks.

my 3inch plasma globe needs 5V 300mA dc supply... Can I use an adapter with 4.5V and 50mA output rating? If can't then what will happen if I still do use it?

The reason I did not place this in the nuclear engineering forum is because I feel that it is closer to an electrical engineering problem than a nuclear engineering problem.Now to the question. I recently got another geiger counter and a plasma globe for my birthday. Being the person I am I...

Hello. I'm studying principle of Langmuir probe and got several questions. 1st, the textbook suddenly tells that ion density within sheath is ni(x) = nis(Vs/V(x))1/2 where nis, Vs are ion density and plasma potential at sheath edge. I found some document which shows that it is obtained by...

Hello, Microwaves are classified as non-ionizing radiation, so my question is, how do microwaves separate atoms into positive ions and electrons? I've heard of multi-photon ionization, is this what happens?

Hello PF, This has been frustrating me for a while: The plasma inside a tokamak is being heated by current induction, which accelerates the ions and electrons in specific directions, thus the velocity of ions increase. These ions collide with each other, eventually randomizing the motion. Now...

Hello I am looking to pursue a master or Ph.D in plasma physics focusing on fusion tokamak reactors. I have an undergrad in Comp Sci and am starting the necessary physics work to apply to grad school. Besides electromagnetics, are there other areas I should focus on? What are the best websites...

Hi, I curoius if there is any way to hold plasma into one spherical ball intead of donut as seen in tokamak using magnetic field? I have came up with a few design but it doesn't seem to do it. Thank you.

I know Blood=plasma+blood corpuscles blood corpuscles=WBC +RBC+Platelets plasma=serum+clotting factors But I am not sure about lymph is lymph equal to plasma+WBC i.e lymph=plasma +WBC

Hello, this is my first post, i only have what we call an O Level Physics here in the UK, but i have a strong layperson's interest in the subject, so I'm looking forward to picking the brains of the more educated people here. My friend's professor showed him something very interesting, all to...

Hi there, I have some questions about plasma I wonder is it possible to use another gas (not inert gases) ?. and where i can find more information of plasma jet ? because it's almost have a copyright. Thank you.

http://www.news.com.au/technology/science/aussie-student-proves-existence-of-plasma-tubes-floating-above-earth/story-fnjwlcze-1227379756018

I've been reading some about the ITER project, tokamaks, and other approaches to plasma containment. Why can't ion trapping approaches such as an orbitrap be used for fusion plasma containment?

Homework Statement In a so called z-pinch the plasma is determined by:B =B0r/a θ^ where a is the pinch radius Calculate the drift velocity due a inhomogenous magnetic field and a bended magnetic field in ions with charge q and mass M in the pinch. Assume that that the ions in the plasma has...

hello I was good in physics and chemistry at school and I have relatively good pre-university knowledge but I never read about plasma which book is complete enough starting from the beginning and mentioning plasma? none of my physics or chemistry books mentioned plasma and it's really...

Hi guys, having a hard time figuring out where to start on a plasma physics related problem. Homework Statement An infinitely long metallic cylinder with a radius of ##r_0## is immersed in a Maxwellian plasma. An electric potential, ##\phi_0##, is applied to the cylinder. Assuming that the...