Talk:Plasma parameters

message: I would suggest adding Lundquist number and Magnetic Reynolds number --Samoojas (talk) 19:49, 1 July 2011 (UTC)
thread_title: Other plasma parameters

message: I think the "c" in the gyrofrequency shouldn't be there. But I don't know much about plasma physics. Someone please, confirm.  — Preceding unsigned comment added by 129.123.154.253 (talk) 01:36, 24 March 2014 (UTC)
replies: text: It's there because the formula is in gaussian units and not SI ones. I think they ought to be converted, unless someone knows a good reason not to. --Ipatrol (talk) 20:39, 17 February 2019 (UTC)
thread_title:  Electron gyrofrequency 

message: The formula for this is off by 10,000, which looks like a flipped sign on the exponent of the constant up front (should be 1.02*10^-2), and/or it was checked in B units of Gauss rather than Tesla as I believe it should, under (coincidentally) Gaussian CGS units.  I have not checked the rest of the page for the same error.
    r_i = v_{Ti}/\omega_{ci} = 1.02\times10^2\,\mu^{1/2}Z^{-1}T_i^{1/2}B^{-1}\,\mbox{cm}  — Preceding unsigned comment added by Pjwitham (talk • contribs) 17:17, 27 August 2014 (UTC)
thread_title:  The formula for ion gyroradius appears to have a constant error. 

message: I would suggest adding a section with the conditions necessary for a plasma to be achieved. For example:
– Debye Length must me smaller than any typical length of the system, otherwise significant charge separations could arise and the plasma becomes dominated by some boundary effects
– Debye length must be statistically valid => there should be enough particles in a Debye Sphere:  N = n (4/3) \pi \lambda_D^3 \gg 1  (where n is the average density of particles)
And some other relations.
Heitorpb (talk) 17:06, 17 October 2015 (UTC)
replies: text: All these conditions are required for a plasma to be called "ideal" in one sense or another. They can be violated. E.g., the condition for a large number of particles in the Debye sphere is violated – sometimes very strongly – in so called strongly coupled plasmas. The Plasma (physics) article discusses it at some length. Evgeny (talk) 22:01, 19 January 2022 (UTC)
thread_title:  Conditions for Plasma 

message: Considering that the Electron temperature article needs some help, and that the electron temperature is one of the most fundamental plasma parameters, maybe it could appear as a subsection in this plasma parameter article instead? -- AquaDTRS (talk) 23:55, 4 September 2018 (UTC)
replies: text: Klbrain (talk) 11:25, 4 January 2020 (UTC)

text: Electron temperature is not a plasma parameter; it's a plasma property - like e.g., electron density or ion charge. One may argue about linguistic differences, but the meaning of "plasma parameter" in this article is quite definite, and temperature doesn't belong here. The main Plasma (physics) article has a dedicated "Temperature" section and a discussion about non-thermal plasmas. I suggest to remove the section here. If there is a content that is worth keeping (though I don't see any), it should be moved over there. Evgeny (talk) 21:54, 19 January 2022 (UTC)
thread_title:  Merger proposal with [[Electron temperature]] 

message: Most (or all?) of the formulas for the plasma parameters on this page have just been copied from the NRL plasma formulary. First of all, I think this should be mentioned more prominently, not just in the references section. Moreover, the cgs unit system used in the NRL formulary is outdated and should really no longer be used in physics articles. Many non-expert readers will not be familiar with conversion of units from the SI system to cgs. A non-expert might also not realize that electromagnetic quantities such as charge or magnetic induction not only have different values but also different dimensions in SI vs cgs unit systems. I would therefore suggest to convert all formulas to SI units except for the plasma temperature, which in plasma physics usually is expressed by its corresponding thermal energy in units of eV instead of k T (T in Kelvin, k the Boltzmann factor).
:Density in particles per cubic centimeter is still quite common in heliophysics and astrophysics, as is ion mass in AMU not kilograms or grams. Because of that and for consistency with other Wikipedia articles, I think including equations in both SI and cgs would be preferable to converting everything to SI. Fcrary (talk) 22:28, 11 October 2020 (UTC)
thread_title: Conversion to SI units