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The electron temperature (Te) and electron density (ne) are important parameters for characterizing the plasma status in the Scrape-Off-Layer (SOL) and the divertor of magnetically confined fusion devices and investigating its physical and chemical properties in different operating conditions [1]. These parameters are usually derived locally using Langmuir Probes (LP), which are intrusive techniques. Optical diagnostics, such as Optical Emission Spectroscopy (OES), utilizing plasma radiation, offer a non-invasive complementary technique providing extremely powerful insights when supported by an accurate atomic modelling [2, 3]. This work focuses on the implementation of the OES technique to analyze an argon plasma in the linear device GyM and to derive an estimate of the line-of-sight averaged Te and ne.
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