Arc facility for investigating non-local thermal equilibrium plasmas
- 1 August 1986
- journal article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 57 (8) , 2093-2095
- https://doi.org/10.1063/1.1138749
Abstract
A high-pressure arc facility has been modified for computerized control and data acquisition to simplify measurements of non-local thermal equilibrium (non-LTE) plasmas. The instrumentation uses a 1-m monochrometer with programmable wavelength scanning system. Plasma self-absorption is determined via a concave back mirror and shutter. The raw data are corrected for absorption, zeroed, centered, and smoothed. The net line intensity is then determined and converted into the radial emission coefficient prior to feeding into LTE or non-LTE analysis programs. Sample graphs demonstrating the self-absorption correction technique and data reduction procedure are presented.Keywords
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