A CRITIQUE OF METHODS FOR CALCULATING THE DIELECTRIC STRENGTH OF GAS MIXTURES AND A PROPOSED TEST FOR -SYNERGISM

摘要: Three currently available methods for predicting the dielectric strength of gas mixtures are discussed and compared. All based on common principle linear addition some property individual gases in proportion to their concentration mixture. The simplest approach uses a weighted sum strengths separate gases. other approaches limiting reduced field (E/N)*m at which net ionization coefficient mixture (alphamacr/N)m = 0. Wieland's approximation alphamacrm involves alphamacr's gases, requires knowledge these over range (E/N)*w < (E/N) (E/N)*s where w s refer weakest strongest involved. It is shown that this general gives varies monotonically with fractional concentrations lies within above E/N. approach, using strengths, empirical rule proposed earlier by Takuma et al., be special cases Wieland approximation. third most physically realistic proportional all relevant electron-molecule collision cross-sections component electron energy distribution mixture, can obtained numerical solution Boltzmann equation. underlying assumption examined light more exact formalism, leads definition test synergism.