Determination of the Electron Temperature of the Plasma | Chapter 9 | Current Research Progress in Physical Science Vol. 4

The aim of the work was to obtain analytical dependences of the electron temperature of the plasma surrounding the spacecraft on the descent trajectory. The radiometric diagnostic method was used. As a result, the desired dependencies were obtained, as well as expressions characterizing diagnostic errors. The results of calculating the errors in determining the electronic plasma temperature depending on the type of radiometer and matching the antenna of the onboard radiometer are presented. The analysis of the obtained results is given.

 

Author (s) Details

V Mikhailov
St. Petersburg State University of Aerospace Instrumentation, RF, Russia.

 

Please see the book here:- https://doi.org/10.9734/bpi/crpps/v4/2982

Four Fundamental Relations in Plasma Flows | Chapter 7 | Scientific Research, New Technologies and Applications Vol. 10

Investigations on electron temperatures and potentials in steady or unsteady dilute plasma flows are reported. The analysis is based on the detailed fluid model for electrons due to their high mobility. Ionization and normalized electron number density gradients are neglected. The transport properties are assumed as local constants. With these treatments, the partial differential equation for electron temperature significantly degenerates for both quasi-steady or unsteady plasma flows. Along an electron streamline, fundamental correlations for electron temperature and plasma potential are obtained. These formulas offer significant insights, 1). for steady flow, the electron temperature and plasma potential distributions along an electron streamline include two exponential functions, and the one for plasma potential includes an extra linear distribution function; 2). for unsteady flows, both the temporal and spatial parts include exponential functions. Oscillations in unsteady flows may decay, amplify, or remain stable. Joule heating effect is included in the analysis. Numerical simulations of dilute plasma plume flows with the hybrid methods are performed to demonstrate these behaviors in plasma flows.

 

Author (s) Details

 

Chunpei Cai
Department of Mechanical and Aerospace Engineering, The Michigan Technological University, Houghton, USA.

 

Zhen Zhang
Department of Mechanical and Aerospace Engineering, The Michigan Technological University, Houghton, USA.

 

Shiying Cai
Department of Mechanical and Aerospace Engineering, The Michigan Technological University, Houghton, USA.

 

David L. Cooke
Space Vehicle Directorate, AFRL, Kirtland Air Force Base, 2000 Wyoming Blvd SE, Albuquerque, USA.

 

Please see the book here:- https://doi.org/10.9734/bpi/srnta/v10/3216