# Accession Number:

## AD0416080

# Title:

## THERMAL IONIZATION IN A SYSTEM WITH A DISTRIBUTION OF IONIZATION POTENTIALS,

# Descriptive Note:

# Corporate Author:

## INTERNATIONAL RESEARCH AND DEVELOPMENT CO LTD NEWCASTLE-UPON-TYNE (ENGLAND)

# Personal Author(s):

# Report Date:

## 1963-04-01

# Pagination or Media Count:

## 4.0

# Abstract:

In a hydrogen plasma, the microfields act upon the neutral atoms and cause Stark effects which result in a distribution of ionization potentials. The distribution function is derived and used with the Saha equation to calculate the electron densities which are then compared with those calculated from a single ionization potential derived from an average microfield given by Cen sub e super 23 where C 4.2, 3.7, and 2.6 respectively, depending on the method of averaging. The temperature range considered is 5750 K to 10700 K in which the electron densities are between 10 to the 14 and 10 to the 17 per cubic centimeter when the neutral particle densities are 10 to the 17 - 10 to the 19 per cubic centimeter. Within these ranges, whereas the electron density calculated from a single ionization potential based on an average field is up to about 1 greater than that given by the Saha equation using the ionization potential of an isolated atom, calculation using the distribution equation gives values up to about 2 greater. Author