| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1193097 | International Journal of Mass Spectrometry | 2014 | 4 Pages |
•Simple and accurate way to determine temperature of LTE plasma using mass spectrometer is proposed.•Measurement of ratio n++/n+ between elements Ba and Pb allows an estimation of temperature of the LTE plasma with accuracy of 10%.•Selection of odd isotopes is the best way to secure double charged ion from isobaric interferences in low resolution.
A simple method of temperature and electron density measurement in quasi-equilibrium plasma at temperatures below 10 kK from the ratio of mass spectrometric signals of the doubly and singly ionized ions of Ba and Pb has been proposed. High masses of the ions and possibility to select the odd isotopes makes it possible to perform measurements at a low mass resolution and low concentrations of the test elements. For atmospheric pressure plasmas at temperatures from 3500 K to 8000 K the temperature can be determined from the relation T = 19,443 (log (NBa++/NBa+)/(NPb++/NPb+))−0.871. Sources of uncertainty and accuracy of the results have also been discussed.
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