Journal article 22924 views
Monitoring of all hydrogen isotopologues at tritium laboratory Karlsruhe using Raman spectroscopy
M Sturm,
M Schlösser,
R. J Lewis,
B Bornschein,
G Drexlin,
H. H Telle,
Helmut Telle
Laser Physics, Volume: 20, Issue: 2, Pages: 493 - 507
Swansea University Author: Helmut Telle
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DOI (Published version): 10.1134/S1054660X10030163
Abstract
We have recorded Raman spectra for all hydrogen isotopologues, using a CW Nd:YVO<sub>4</sub> laser (5 W output power at 532 nm) and a high-throughput (f/1.8) spectrograph coupled to a Peltier-cooled (200 K) CCD-array detector (512x2048 pixels). A (static) gas cell was used in all measure...
| Published in: | Laser Physics |
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| ISSN: | 1054-660X 1555-6611 |
| Published: |
2010
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa1163 |
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| Abstract: |
We have recorded Raman spectra for all hydrogen isotopologues, using a CW Nd:YVO<sub>4</sub> laser (5 W output power at 532 nm) and a high-throughput (f/1.8) spectrograph coupled to a Peltier-cooled (200 K) CCD-array detector (512x2048 pixels). A (static) gas cell was used in all measurements. We investigated (i) “pure” fillings of the homonuclear isotopologues H<sub>2</sub>, D<sub>2</sub>, and T<sub>2</sub>; (ii) equilibrated binary fillings of H<sub>2</sub>+D<sub>2</sub>, H<sub>2</sub>+T<sub>2</sub>, and D<sub>2</sub>+T<sub>2</sub>, thus providing the heteronuclear isotopologues HD, HT and DT in a controlled manner; and (iii) general mixtures containing all isotopologues at varying concentration levels. Cell fillings within the total pressure range 13–985 mbar were studied, in order to determine the dynamic range of the Raman system and the detection limits for all isotopologues. Spectra were recorded for an accumulation period of 1000 s. The preliminary data evaluation was based on simple peak-height analysis of the ro-vibrational Q1-branches, yielding 3σ measurement sensitivities of 5x10<super>–3</super>, 7x10<super>–3</super>, and 25x10<super>–3</super> mbar for the tritium-containing isotopologues T<sub>2</sub>, DT, and HT, respectively. These three isotopologues are the relevant ones for the KATRIN experiment and in the ITER fusion fuel cycle. While the measurements reported here were carried out with static-gas fillings, the cells are also ready for use with flowing-gas samples. |
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| College: |
Faculty of Science and Engineering |
| Issue: |
2 |
| Start Page: |
493 |
| End Page: |
507 |