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Monitoring of tritium purity during long-term ciculation in the KATRIN test experiment LOOPINO using laser Raman spectroscopy

Fischer, S, Sturm, M, Schlösser, M, Bornschein, B, Drexlin, G, Priester, F, Lewis, Richard and Telle, H H 2010. Monitoring of tritium purity during long-term ciculation in the KATRIN test experiment LOOPINO using laser Raman spectroscopy. Presented at: 9th International Conference on Tritium Science and Technology (TRITIUM 2010), Nara, Japan, 24-29 October 2010. -.

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Abstract

The gas circulation loop LOOPINO has been set up and commissioned at Tritium Laboratory Karlsruhe (TLK) to perform Raman measurements of circulating tritium mixtures under conditions similar to the inner loop system of the neutrino-mass experiment KATRIN, which is currently under construction. A custom-made interface is used to connect the tritium containing measurement cell, located inside a glove box, with the Raman setup standing on the outside. A tritium sample (purity > 95%, 20 kPa total pressure) was circulated in LOOPINO for more than three weeks with a total throughput of 770 g of tritium. Compositional changes in the sample and the formation of tritiated and deuterated methanes CT_(4-n)X_n (X=H,D/ n=0,1) were observed. Both effects are caused by hydrogen isotope exchange reactions and gas-wall interactions, due to tritium {\beta} decay. A precision of 0.1% was achieved for the monitoring of the T_2 Q_1-branch, which fulfills the requirements for the KATRIN experiment and demonstrates the feasibility of high-precision Raman measurements with tritium inside a glove box.

Item Type: Conference or Workshop Item (Lecture)
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Last Modified: 03 May 2019 11:00
URI: http://orca.cf.ac.uk/id/eprint/122124

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