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Questions tagged [plasma-physics]

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Theory, lab and space experiments, and calculations related the physics of plasmas, i.e., matter constituted by ionized atoms.

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I am currently trying to understand plasma wakefield accelerators and am struggling to identify the shape of the bubble created and the longitudinal force. When a laser is shone in a plasma, the ...
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Why is the heliopause suddenly so hot? Eris is very cold, as it's an ice dwarf like Pluto, though twice as far from the sun (cold enough for nitrogen ice). Then suddenly, further out, the temperature ...
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Google AI tells me that distilled water does not get activated, and is also very good at blocking ionizing radiation. So suppose we decided to excavate a big hole by digging a small one, filling it ...
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Is there a standard symbol for the specific charge ($q/m$, or $\rho_{\text{electric}}/\rho_{\text{mass}}$)? Or at least a symbol that someone has ever used in a textbook or paper. The context for me ...
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How do you deconvolute the Gaussian and Lorentz from the Voigt function? Typical deconvolution, I know, involves different peak positions. But for a case like this, where the peaks are at the same ...
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So yesterday I was doing a physics demonstration using a plasma ball in which I showed the students that we can light up a small led by holding one of it's end with our fingers and bringing the other ...
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I have read other answers (here and related) discussing why the hypothesis of Teller – of a runaway chain reaction of nitrogen fusion literally destroying the world in one fell swoop – is not a risk ...
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I have a problem to explain the behavior of solutions of the dispersion relation (DR) of Right-hand Circularly Polarized (RCP) electromagnetic waves in a hot magnetized Maxwellian plasma, consisting ...
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As shown in this illustration: A primary normal toroidal magnetic field is used for the plasma confinement shown with green and an additional in superposition secondary helical magnetic field shown ...
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Suppose I have a collection of particles with coordinates $q_i,p_i$, and suppose this system evolves under some classical Hamiltonian. What I want is to construct a local phase space density $f(q,p)$ ...
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Let's assume we have a plasma confined in a tokamak. To create the confining magnetic field, a toroidal net current needs to flow in the plasma, creating the poloidal magnetic field. This is, for ...
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I was reading a paper on cathode rays and I came across a section that discuss debye length in terms of electron beam. Here's the paper http://uspas.fnal.gov/materials/10MIT/...
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Fokker Planck equation is widely used in plasma physics to descirbe the time evolution of the plasma in tokamaks (see, e.g., https://www.compxco.com/cql3d_manual.pdf). As known, Fokker-Planck equation ...
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I have questions about the stimulated Raman parametric instability (SRS) that occurs during the interaction between a laser pulse and a plasma. What does the terms "parametric" and "...
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I performed a collision of electron-ion with using initial tmeperature of electron as $T_{e0}=$ 20 eV, ion as $T_{i0}=$ 10 eV and distributing with Maxwellian distribution of velocity. The density of ...
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I am trying to solve a rate equation that describes the evolution of free electron density of fused silica under action of a Gaussian Beam with peak intensity of $100 \,\text{TW}/\text{cm}^2$, pulse ...
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I am reading Gas Discharge Physics by Raizer, and I came along the following passage: Let us evaluate the effect [of space charge], taking for the zeroth approximation the charge density ...
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From my understanding, pinching plasma to the center is the most important thing. And with Lorentz force, poloidal magnetic field from plasma current itself is pinching it to the center, this should ...
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I have been reading an article about the interaction of a planet within a pulsar wind. However I got confused about some of the velocities and reference frames. There are two reference frames: ...
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A couple days ago I asked a question on if plasma could have a magnetic field due to current which was a yes. Now I am wondering again on if plasma can possess eddy currents. Assuming a time varying ...
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UPDATE: 12 July 2024 This question has been answered. Also, I figured out the problem. One of the papers I was referencing (Ripperda et al.) had a typo, which was leading to the errors. The method is ...
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Can an extremely low-frequency electromagnetic wave (below 500 Hz for example) propagate through an ionosphere? The cutoff frequency of Earth-ionosphere waveguide is approximately 1.7 kHz so I ...
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Let's say we have a gas, of argon atoms for example. We raise the temperature of the gas to 20,000K. Some atoms collide with enough energy that the atoms ionize, into free electrons and ions. So, now ...
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Some things I understand to be true: When we raise the temperature of a gas to around 10-20,000 Kelvin, the molecules of gas start to ionize, form a plasma, according to the Saha equation. The ...
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As we know, light in free space cannot excite plasma waves. However, it is possible to get help from the prism, grating or surface modification. However, with the help of two high-intensity laser ...
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