The approach presented in a study uses the laser Rayleigh scattering technique. This is a non-intrusive method, and it does not disturb the plasma and neutral flow. Number densities can be measured quantitatively by calibration using 104 Pa nitrogen, so a complicated collisional-radiative model is not required. The Rayleigh scattering spectrum reflects the velocity distribution of the atoms, so propellant xenon atoms can be distinguished from the ambient xenon atoms. In addition, even when both ions and electrons are present, the neutral number density can be estimated, since the scattering spectrum is a convolution of Rayleigh and Thomson spectra.
|Number of pages||4|
|Journal||Transactions of the Japan Society for Aeronautical and Space Sciences|
|Publication status||Published - 2017|
All Science Journal Classification (ASJC) codes
- Aerospace Engineering
- Space and Planetary Science