PLASMA DIAGNOSTIC AND ELECTRIC PROPULSION
Research Assistant at Purdue plasma and electric propulsion lab.
Plasma spectroscopy is one of the oldest diagnostic tools for plasma physics. It is an ideal non-invasive measuring tool by collecting the wavelength and intensity of the light radiation, we can identify the property of the plasma.
Microwave interferometry uses the interference between the plasma and electromagnetic wave propagation to measure the plasma's electron density. By comparing the phase shift of the reflected and transmitted through the plasma, the density can be found.
Langmuir probe is a classical way of detecting the electron temperature, electron density, and electric potential of the plasma. By invasively inserting electrodes into the plasma, the time-varying electric potential will allow the detection of these parameters.