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The attraction of plasmas for these applications derives from the role of the free electrons present in all plasmas. A unique quality of plasmas critical to many applications is the capability of non-equilibrium chemistry; ``high-temperature'' gas phase reactions occur while substrates remain cool. These gas phase reactions, producing highly reactive neutral and ionic species that react with exposed substrate surfaces, are enabled by electron population selectively maintained at temperatures greater than 10,000$^\circ$F through heating by electromagnetic fields. Collisions between molecules in the gas phase and highly energetic electrons lead to chemical reactions that would require a high temperature reactor in the absence of the plasma.  The plan described herein  to develop improved diagnostic tools for low-temperature plasmas will make a contribution toward the ultimate goal of ``predictive design'' of plasma processes. In particular, we seek to develop make use of  the untapped potential of the glow emitted by the plasma as plasma, developing  a non-invasive  diagnostic based  to probe the characteristics of the plasma. MENTION community demand - plasma 2020, low temperature plasma report, etc. Low cost, easy to implement. SHARE CODE *not*