Nathan Zechar

7 Questions 6 Answers 0 Followers

Questions related from Nathan Zechar

Is there a dispersion relation for metal vapor density similar to plasma density?

Electromagnetic waves with frequencies approaching those of a plasma with a similar election plasma frequency, are highly reflected/absorbed by the plasma and can be predicted by a dispersion...

18 August 2023 2,713 0 View

FDTD - How do I address faster than light travel due to permittivity less than 1 but greater than 0 in FDTD simulations?

I am observing non-physical phenomena in my FDTD simulations when using a permittivity of less than 1 but greater than 0 (plasma). What I observe are wave fronts traveling at the phase velocity....

30 August 2021 7,765 13 View

FDTD - How to model when tensors are not symmetric positive definite?

I'm currently attempting a 3D FDTD simulation where I'm modeling a plasma as a dielectric tensor based off a frequency dependent Appleton Hartree dispersion relation. The inversion of the...

31 July 2021 4,556 3 View

High temperature epoxy coating for the purpose of inductive heating?

Is it possible to add metallic power (Fe, Co) to a type of epoxy, to create a "paint" that is susceptible to inductive heating? I have attempted to add Iron power to a carbon based high...

16 August 2019 9,429 3 View

Thermally matched hermetic layer to metal for temperatures in excess of 1000 Celsius in a non-vacuum application?

I'm looking for combinations of metal and a type of hermetic layer that could be applied to that metal which can survive a high temperature environment in excess of 1000 Celsius. The purpose is...

26 January 2019 8,105 0 View

Low thermal expansion. Low electrically resistive oxide layer. Creep resistant metal/alloy?

Hello, I am looking for a metal/alloy for an application that involves a 1000 Celsius environment exposed to atmospheric air. The material properties of interest are - Low thermal expansion...

19 January 2019 1,806 2 View

Excitation of Ion Acoustic Waves in an Argon Plasma (SS & Afterglow)?

I'm currently attempting to excite ion acoustic waves with 27.12MHz Helicon array plasma source which is operating in steady state. I'm using the mesh grid method by applying an oscillating...

10 August 2016 7,007 2 View