Plasma physics Definition and 169 Threads

Hi Guys! I'm a student studying undergrad Sophomore, pursuing Honors B.S. in Physics and Applied Math. I have been looking up Princeton Program in Plasma Physics (PPPL) and got very interested in their research in nuclear fusion. Any advice on how to get good/prepared enough to have high odds of...

When studying a particle in slowly time varying, uniform electric field E, and in a constant, uniform magnetic field \textbf{B}, I found many texts where I can't understand the derivation of the "polarization drift" \textbf{v}_p, in particular I quote as reference this book I found online ([1]...

I am trying to calculate the spitzer resistivity of an arc discharge plasma and I have not been able to figure out how to calculate electron temperature (Te). What is the formula / method of getting this value? How does electron temperature vary in relation to current and voltage moving through...

I know that Spitzer derived the conductivity of plasma in his famous 1952 paper. I just wonder if this result can be derived by Rosenblith potentials because they both encouner solving Boltzman equation and carefullt treating the collisional term.

I am currently working on the determining the viability of muon-catalyzed fusion in a dense but tepid plasma and the first question pertains to the formation of muonic atoms once muons are injected into the plasma. Suppose the plasma is sufficiently dense such that pressure ionization ensures...

First, assuming, ##v \alpha e^{i(k{\pm}z - \omega t)}## I worked with the equation of motion to get: ##-i\omega v_x = -\frac{e}{m}E_x - \omega_c v_y## and ##-i\omega v_y = -\frac{e}{m}E_y + \omega_c v_x## Solving this system of equations, I end up with: ##v_x = \frac{-e}{m(\omega^2 -...

I have Optical Emission Spectroscopy data on nitrogen's second positive system and first negative system. I would like to calculate the electron temperature using the line-ratio method, which is given as: $$k_b T_e = (E_2 - E_1) * ( ln( \frac{I_1 \lambda_1 g_2 A_2}{I_2 \lambda_2 g_1 A_1} )...

Hi. I am starting to do a gas mixture simulation. I learn the fundamentals from a paper. (doi: 10.1088/0022-3727/43/2/022001) For a gas mixture (Fe vapor in Argon), the mole fraction of Fe vapor is calculated by, and the diffusion flux JFe is given by, x_ar is the mole fraction of Argon; T is...

It was after listening to podcasts on Freeman Dyson two or three years ago that I was convinced that our best bet at Earth-Moon navigating was somewhere along the lines of a nuclear-chemical pulsed transmission. And I guess the subject matter leads itself into plasma physics somehow. (Funny...

Hi! everyone. I'm looking to plot potential of quasi-neutral plasma as a function of length. I know that plasma potential will drop at front of the wall from particle acceleration by electric field. I assume plasma is an electrostatic and cold (less collision). However, I'm trying to plot plasma...

Is it possible to keep the plasma ionized almost indefinitely. No additional heating is required.

I am currently a sophomore in HS, and I have a science fair project next year. I want to do something interesting- I don't want to put in barely any effort and do something that everyone has done, like 'growing plants in different light levels'. I would ideally like to do something with...

Ion sources are devices that allow creating ion beams (e.g. argon ions) and to project them outside the device, for example to be further processed by a particle accelerator, or to irradiate materials or biological tissues etc. The ions are usually created by a plasma inside a cavity filled...

It is usual, in plasma physics, to combine the kinetic description for electron fluid and the hydrodynamic description for ion fluid, when studying the plasma properties or the dynamics of the electrostatic waves. I am wondering what are the physical meaning and limits of such an approach. Thanks.

Summary:: I am learning particle-in-cell (PIC) python 3X code. PIC currently represents one of the most important plasma simulation tools. It is particularly suited to the study of kinetic or non-Maxwellian effects. I am learning particle-in-cell (PIC) python code. PIC currently represents one...

Basically the thread title. For some background, I'm trying to model laser-material interactions, where I'm assuming that the laser is interacting with a free electron gas (copper). To model the interaction, I need to determine the properties of the electron gas, such as the heat capacity...

Hi guys. I'm a third year physics student. Next year I'll be in my final year. I'm interested in studying fusion in the future. Unfortunately I have not done plasma physics as part of my degree so I don't know much about it yet. However I'd like to do an internship abroad this summer. Ideally I...

Summary:: I am looking for topics to give a presentation on. Hi everyone. If this is in the wrong section feel free to move it. Anyway, as part of our lab course, on top of doing experiments we will also have to prepare a 20 minute presentation on a chosen topic on physics. This is not like...

As the title indicates, what are some soft skills needed (math/programming/cfd softwares) do I need if I wish to pursue a masters degree in plasma/fusion physics? Also, how do you think I should go about learning them? Thank you.

Summary: I'm interested in knowing more about instabilities within plasma. Is the viscosity of plasma produced by thermal, magnetic, or gravitational effects (or even something else)? I had the opportunity to talk with multiple Ph.D. students during the summer and was especially interested in...

i have researched fusion reactors. i can't find a straight answer. what is cusp confinement.

Principles of Plasma physics by Krall & Trivelpiece seems to be a well-used book in the plasma physics community, but I've never seen a solution key for the questions asked in the book. I am trying some of the problems and want to check my work. Is there such a solution key or some blog that...

I have no clear idea of this phenomenon?

Early in Bellan he asks us to consider a finite-temperature plasma and assume that the ion and electron densities are initially equal and spatially uniform. He approaches the problem of calculating the Debye length by considering each species of particle, σ , as being a fluid so that the...

Hi, I've posted here several time because you all gave me very helpful suggestions. Let me recap briefly my situation. I apologize for the very long post. I have BS in chemical engineering but now I'm going through a MS degree in nuclear engineering. Although - given my background - I should...

I don't know where to even begin?

I'm an undergraduate student and thinking of doing a research in plasma physics. Any suggestion? I prefer to do it computationally. Most research topic in plasma physics I googled are about fusion, but do you think it's too advanced for my education level?

Hi, I was wondering of those who might write papers in this field. What is the convention of units in plasma physics papers, and is this often all screwed around and you have to already understand it to understand it? I'll give you an example, because I am looking at this paper to understand...

Dear community, I am Pedro de la Torre, now doing my PhD on Cosmic ray propagation. Now, I have started to study reacceleration due to interactions of CR with plasma waves. My problem is that I do not find neither a good book or any kind of review with a detailed demonstration on the...

Let us say that we have a dispersion relation curve and associated instability curve as shown below for a magnetised plasma, which have been formulated through kinetic theory. The frequencies and growth rate have been normalized w.r.t. cyclotron frequency of proton. My question is: what does...

In plasma physics we have what is known as plasma dispersion function. There are two approximation under which this function can be expanded: when the argument is less than 1, we can use power series expansion and when the argument is greater than 1 we can have asymptotic expression. My...

I have a thin copper tube of 4.4mm inner diameter (inside a long ionizer plasma cannon) and I want to fill in with hydrogen plasma fully ionized at low temperature (100eV), what is recommended magnetic field to have the ions there without touching tha walls? The plasma life is about 0.5 seconds

I am trying to understand the "strong" negative E field in the Aston Dark Space in the thin region close to the cathode or else even the cathode surface. See the diagram at: http://www.glow-discharge.com/?Physical_background:Glow_Discharges My question regards the "Electrical Field E" graph...

Lectures by Prof. V.K. Tripathi and Prof. Vijayshri, IIT Delhi. Copyright strictly reserved to professors and NPTEL, Govt. Of India. Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=115102020 Lectures: http://www.nptel.ac.in/courses/115102020/

Lectures by Prof. V.K. Tripathi and Prof. Vijayshri, IIT Delhi. Copyright strictly reserved to professors and NPTEL, Govt. Of India. Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=115102020 Lectures: http://www.nptel.ac.in/courses/115102020/

Lectures by Prof. V.K. Tripathi and Prof. Vijayshri, IIT Delhi. Copyright strictly reserved to professors and NPTEL, Govt. Of India. Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=115102020 Lectures: http://www.nptel.ac.in/courses/115102020/

Lectures by Prof. V.K. Tripathi and Prof. Vijayshri, IIT Delhi. Copyright strictly reserved to professors and NPTEL, Govt. Of India. Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=115102020 Lectures: http://www.nptel.ac.in/courses/115102020/

Lectures by Prof. V.K. Tripathi and Prof. Vijayshri, IIT Delhi. Copyright strictly reserved to professors and NPTEL, Govt. Of India. Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=115102020 Lectures: http://www.nptel.ac.in/courses/115102020/

Lectures by Prof. V.K. Tripathi and Prof. Vijayshri, IIT Delhi. Copyright strictly reserved to professors and NPTEL, Govt. Of India. Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=115102020 Lectures: http://www.nptel.ac.in/courses/115102020/

Lectures by Prof. V.K. Tripathi and Prof. Vijayshri, IIT Delhi. Copyright strictly reserved to professors and NPTEL, Govt. Of India. Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=115102020 Lectures: http://www.nptel.ac.in/courses/115102020/

Lectures by Prof. V.K. Tripathi and Prof. Vijayshri, IIT Delhi. Copyright strictly reserved to professors and NPTEL, Govt. Of India. Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=115102020 Lectures: http://www.nptel.ac.in/courses/115102020/

Lectures by Prof. V.K. Tripathi and Prof. Vijayshri, IIT Delhi. Copyright strictly reserved to professors and NPTEL, Govt. Of India. Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=115102020 Lectures: http://www.nptel.ac.in/courses/115102020/

Lectures by Prof. V.K. Tripathi and Prof. Vijayshri, IIT Delhi. Copyright strictly reserved to professors and NPTEL, Govt. Of India. Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=115102020 Lectures: http://www.nptel.ac.in/courses/115102020/

Lectures by Prof. V.K. Tripathi and Prof. Vijayshri, IIT Delhi. Copyright strictly reserved to professors and NPTEL, Govt. Of India. Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=115102020 Lectures: http://www.nptel.ac.in/courses/115102020/

Lectures by Prof. V.K. Tripathi and Prof. Vijayshri, IIT Delhi. Copyright strictly reserved to professors and NPTEL, Govt. Of India. Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=115102020 Lectures: http://www.nptel.ac.in/courses/115102020/

Lectures by Prof. V.K. Tripathi and Prof. Vijayshri, IIT Delhi. Copyright strictly reserved to professors and NPTEL, Govt. Of India. Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=115102020 Lectures: http://www.nptel.ac.in/courses/115102020/

Lectures by Prof. V.K. Tripathi and Prof. Vijayshri, IIT Delhi. Copyright strictly reserved to professors and NPTEL, Govt. Of India. Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=115102020 Lectures: http://www.nptel.ac.in/courses/115102020/

Lectures by Prof. V.K. Tripathi and Prof. Vijayshri, IIT Delhi. Copyright strictly reserved to professors and NPTEL, Govt. Of India. Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=115102020 Lectures: http://www.nptel.ac.in/courses/115102020/

Lectures by Prof. V.K. Tripathi and Prof. Vijayshri, IIT Delhi. Copyright strictly reserved to professors and NPTEL, Govt. Of India. Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=115102020 Lectures: http://www.nptel.ac.in/courses/115102020/

Lectures by Prof. V.K. Tripathi and Prof. Vijayshri, IIT Delhi. Copyright strictly reserved to professors and NPTEL, Govt. Of India. Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=115102020 Lectures: http://www.nptel.ac.in/courses/115102020/