Quantitative Long-Term Monitoring of the Circulating Gases in the KATRIN Experiment Using Raman Spectroscopy

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F20%3A00532615" target="_blank" >RIV/61389005:_____/20:00532615 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.3390/s20174827" target="_blank" >https://doi.org/10.3390/s20174827</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/s20174827" target="_blank" >10.3390/s20174827</a>

Result language

angličtina

Original language name

Quantitative Long-Term Monitoring of the Circulating Gases in the KATRIN Experiment Using Raman Spectroscopy

Original language description

The Karlsruhe Tritium Neutrino (KATRIN) experiment aims at measuring the effective electron neutrino mass with a sensitivity of 0.2 eV/c(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 concentrationsc(x)for all six hydrogen isotopologues were monitored simultaneously, with a measurement precision for individual components of the order 10(-3)or better throughout the complete KATRIN data taking campaigns to date. From these, the tritium purity,epsilon(T), is derived with precision of <10(-3)and trueness of <3 x 10(-3), being within and surpassing the actual requirements for KATRIN, respectively.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10303 - Particles and field physics

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Sensors

ISSN

1424-8220

e-ISSN

—

Volume of the periodical

20

Issue of the periodical within the volume

17

Country of publishing house

CH - SWITZERLAND

Number of pages

29

Pages from-to

4827

UT code for WoS article

000570345700001

EID of the result in the Scopus database

2-s2.0-85090172633