Please explain to me step by step method to calculate the Electron Density of a Low-Temperature Argon DC Glow Discharge Plasma using Optical Emission Spectroscopy.
This laboratory plasma is produced by DC Glow Discharge of
(i) Argon gas
or
(ii) Some other gas mixed with Argon gas
The applied voltage ranges from 300 - 500 volt, whereas the pressure ranges from 0.10 - 0.20 millibar.
I expect my Electron Temperature and Electron Density to be approximate of the order of1 eV and 10^14 - 10^15 per meter cube, respectively.
What do you measure? Do you measure line shapes? Do you measure continuum emmission? I assume you mean you can use either pure Argon gas or mixed with some impurity such as hydrogen. I also assume the temperature is about 1eV? If so, you could get the density fairly easily and reliably from the H-beta line if you can see this.
S. Alexiou Thank you very much for your response!
(1) I'm measuring line emission. The resolution of my Spectrometer is less than 1 nm. Please tell me whether I can observe the H-beta line with this resolution or not?
(2) I want to find Electron Density of my DC Glow Discharge Plasma using either pure Argon or some other gas mixed with Argon, whichever is easy.
(3) The temperature is about 1 eV and the expected electron density is approximate of the order of 1014 to 1015 m-3.
Also, the specifications of the spectrometer used by me are attached here. Please have a look at it.
Article Computer simulated Balmer-alpha, -beta and -gamma Stark line...
with your resolution and expected density, it could be borderline. If you are unable to see H-beta, I'd suggest a higher lying line, like H6-H8, see PHYSICAL REVIEW E 75, 016401 (2007)
- Badges
- Science topic
- Similar topics
- Physics