Journal
REVIEW OF SCIENTIFIC INSTRUMENTS
Volume 79, Issue 10, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2953577
Keywords
Langmuir probes; plasma density; plasma production; plasma temperature
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We present a method to infer the electron temperature in argon plasmas using a collisional-radiative model for argon ions and measurements of electron density to interpret absolutely calibrated spectroscopic measurements of argon ion (Ar II) line intensities. The neutral density, and hence the degree of ionization of this plasma, can then be estimated using argon atom (Ar I) line intensities and a collisional-radiative model for argon atoms. This method has been tested for plasmas generated on two different devices at the University of Texas at Austin: the helicon experiment and the helimak experiment. We present results that show good correlation with other measurements in the plasma.
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