Gaseous Tritium Activity Monitoring with Scintillators (GaTAMoS)

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Abstract
We present a novel device for the inline activity monitoring of gaseous tritium, named “Gaseous Tritium Activity Monitoring with Scintillators” (GaTAMOS). Unlike established methods that often rely on liquid scintillation or plastic scintillators with limited chemical resistance, this system utilizes a chemically inert, inorganic Terbium-activated Gadolinium Oxysulfide (Gd2O2S:Tb) ceramic. A specialized soldering technique was developed to join the ceramic scintillator to a stainless-steel flange, achieving a vacuum-tight seal (95% of residual contamination within minutes. The proposed system offers a compact, robust, and cost-effective alternative to ionization chambers or BIXS systems for process monitoring in tritium handling facilities.