PARTITION FUNCTIONS AND THERMODYNAMIC PROPERTIES OF ARGON PLASMA

Abstract

Using tabulated data for observed atomic energy levels plus estimated energies for levels which are predicted but not observed, the internal partition functions for the argon atom and the first four argon ions were calculated on an IBM 709 computer. The partition functions were terminated by application of the Debye cutoff criterion and a corresponding lowering of the ionization potential was included. Assuming a mixture of six perfect gases (electrons, argon atoms, and argon ions) the equilibrium composition, internal partition functions and thermodynamic properties were calculated and tabulated for five pressures (0.1, 0.5, 1.0, 2.0, and 5.0 atmospheres) at 100 K increments for a range of temperatures from 5000 to 35000 K. The tables and figures include internal partition functions, composition, density, entropy, internal energy, enthalpy, Gibbs and Helmholtz potentials, specific heats at constant pressure and volume, the effective gamma and equilibrium sound speed.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1963
Accession Number
AD0414708

Entities

People

  • Ali B. Cambel
  • C. F. Knopp

Organizations

  • Northwestern University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Atomic Energy Levels
  • Charged Particles
  • Computer Programs
  • Computers
  • Electron Density
  • Electrons
  • Energy Levels
  • Engineering
  • Enthalpy
  • Free Energy
  • Ground State
  • Mechanical Engineering
  • Plastic Explosives
  • Quantum Mechanics
  • Quantum Numbers
  • Thermodynamic Properties

Fields of Study

  • Physics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Plasma Physics.
  • Statistical inference.

Technology Areas

  • Microelectronics