Quantitative long-term monitoring of the circulating gases in the KATRIN experiment using Raman spectroscopy
The Karlsruhe Tritium Neutrino (KATRIN) experiment aims at measuring the effective electron neutrino mass with a sensitivity of 0.2 eV/c[superscript 2], i.e., improving on previous measurements by an order of magnitude. Neutrino mass data taking with KATRIN commenced in early 2019, and after only a...
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Multidisciplinary Digital Publishing Institute
2020
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| Online Access: | https://hdl.handle.net/1721.1/127762 |
| _version_ | 1826211538969559040 |
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| author | Formaggio, Joseph A Xu, Weiran |
| author2 | Massachusetts Institute of Technology. Laboratory for Nuclear Science |
| author_facet | Massachusetts Institute of Technology. Laboratory for Nuclear Science Formaggio, Joseph A Xu, Weiran |
| author_sort | Formaggio, Joseph A |
| collection | MIT |
| description | The Karlsruhe Tritium Neutrino (KATRIN) experiment aims at measuring the effective electron neutrino mass with a sensitivity of 0.2 eV/c[superscript 2], i.e., improving on previous measurements by an order of magnitude. Neutrino mass data taking with KATRIN commenced in early 2019, and after only a few weeks of data recording, analysis of these data showed the success of KATRIN, improving on the known neutrino mass limit by a factor of about two. This success very much could be ascribed to the fact that most of the system components met, or even surpassed, the required specifications during long-term operation. Here, we report on the performance of the laser Raman (LARA) monitoring system which provides continuous high-precision information on the gas composition injected into the experiment's windowless gaseous tritium source (WGTS), specifically on its isotopic purity of tritium--one of the key parameters required in the derivation of the electron neutrino mass. The concentrations c[subscript x] for all six hydrogen isotopologues were monitored simultaneously, with a measurement precision for individual components of the order 10[superscript -3] or better throughout the complete KATRIN data taking campaigns to date. From these, the tritium purity, ε[subscript T] is derived with precision of 10[superscript -3] and trueness of 3 x 10[superscript -3], being within and surpassing the actual requirements for KATRIN, respectively. |
| first_indexed | 2024-09-23T15:07:30Z |
| format | Article |
| id | mit-1721.1/127762 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T15:07:30Z |
| publishDate | 2020 |
| publisher | Multidisciplinary Digital Publishing Institute |
| record_format | dspace |
| spelling | mit-1721.1/1277622022-10-02T00:44:29Z Quantitative long-term monitoring of the circulating gases in the KATRIN experiment using Raman spectroscopy Formaggio, Joseph A Xu, Weiran Massachusetts Institute of Technology. Laboratory for Nuclear Science United States Department of Energy (grants DE-FG02-97ER41020, DE-FG02-94ER40818, DE-SC0004036, DE-FG02-97ER41033, DE-FG02-97ER41041, DE-AC02-05CH11231, DE-SC0011091, and DE-SC0019304) The Karlsruhe Tritium Neutrino (KATRIN) experiment aims at measuring the effective electron neutrino mass with a sensitivity of 0.2 eV/c[superscript 2], i.e., improving on previous measurements by an order of magnitude. Neutrino mass data taking with KATRIN commenced in early 2019, and after only a few weeks of data recording, analysis of these data showed the success of KATRIN, improving on the known neutrino mass limit by a factor of about two. This success very much could be ascribed to the fact that most of the system components met, or even surpassed, the required specifications during long-term operation. Here, we report on the performance of the laser Raman (LARA) monitoring system which provides continuous high-precision information on the gas composition injected into the experiment's windowless gaseous tritium source (WGTS), specifically on its isotopic purity of tritium--one of the key parameters required in the derivation of the electron neutrino mass. The concentrations c[subscript x] for all six hydrogen isotopologues were monitored simultaneously, with a measurement precision for individual components of the order 10[superscript -3] or better throughout the complete KATRIN data taking campaigns to date. From these, the tritium purity, ε[subscript T] is derived with precision of 10[superscript -3] and trueness of 3 x 10[superscript -3], being within and surpassing the actual requirements for KATRIN, respectively. 2020-09-28T14:56:55Z 2020-09-28T14:56:55Z 2020-08 2020-07 2020-09-07T22:00:06Z Article http://purl.org/eprint/type/JournalArticle 1424-8220 https://hdl.handle.net/1721.1/127762 Aker, Max et al. "Quantitative long-term monitoring of the circulating gases in the KATRIN experiment using Raman spectroscopy." Sensors 20, 17 (August 2020): 4827 ©2020 Author(s) 10.3390/s20174827 Sensors Creative Commons Attribution https://creativecommons.org/licenses/by/4.0/ application/pdf Multidisciplinary Digital Publishing Institute Multidisciplinary Digital Publishing Institute |
| spellingShingle | United States Department of Energy (grants DE-FG02-97ER41020, DE-FG02-94ER40818, DE-SC0004036, DE-FG02-97ER41033, DE-FG02-97ER41041, DE-AC02-05CH11231, DE-SC0011091, and DE-SC0019304) Formaggio, Joseph A Xu, Weiran Quantitative long-term monitoring of the circulating gases in the KATRIN experiment using Raman spectroscopy |
| title | Quantitative long-term monitoring of the circulating gases in the KATRIN experiment using Raman spectroscopy |
| title_full | Quantitative long-term monitoring of the circulating gases in the KATRIN experiment using Raman spectroscopy |
| title_fullStr | Quantitative long-term monitoring of the circulating gases in the KATRIN experiment using Raman spectroscopy |
| title_full_unstemmed | Quantitative long-term monitoring of the circulating gases in the KATRIN experiment using Raman spectroscopy |
| title_short | Quantitative long-term monitoring of the circulating gases in the KATRIN experiment using Raman spectroscopy |
| title_sort | quantitative long term monitoring of the circulating gases in the katrin experiment using raman spectroscopy |
| topic | United States Department of Energy (grants DE-FG02-97ER41020, DE-FG02-94ER40818, DE-SC0004036, DE-FG02-97ER41033, DE-FG02-97ER41041, DE-AC02-05CH11231, DE-SC0011091, and DE-SC0019304) |
| url | https://hdl.handle.net/1721.1/127762 |
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