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Abstract
Characterization of the electically and chemically hostile environment of an electrical discharge is basic to the successful application of discharge technology. The flow calorimetry of a low pressure hydrogen discharge is investigated as an alternative to other nonintrusive techniques. Energy flux measurements are used to estimate electron gas properties and probe details of energy transfer and electron-impact-induced kinetic phenomena. The estimates successfully resolve the effects of changes in gas pressure and flow rate on the electron density and energy profiles and also provide a quantitative evaluation of the contribution of a variety of kinetic and transport processes.