Recent development in microwave diagnostic techniques for the electron temperature determination in low density gas plasma
Abstract
The microwave diagnostic technique for the determination of electron temperature in a low-density gas plasma is investigated with the purpose of minimizing error due to such second-order microwave effects as wave-plasma boundary interference, diffraction of waves by apertures, defocusing by the plasma, and deflection of waves produced by electron density gradients. It is shown that the accuracy of temperature determination is improved with a test section which permits a simultaneous transmission of two microwave beams at different frequencies. After corrections for diffraction and beam bending, the uncertainty in electron temperature determination is reduced to between minus 20% and plus 10%.
- Publication:
-
AUTOTESTCON 1979
- Pub Date:
- 1979
- Bibcode:
- 1979ieee.conf..302S
- Keywords:
-
- Argon Plasma;
- Electron Energy;
- Microwave Transmission;
- Plasma Diagnostics;
- Collision Rates;
- Electric Fields;
- Maxwell-Boltzmann Density Function;
- Wave Attenuation;
- Wave Diffraction;
- Plasma Physics