16 research outputs found
First operation of the KATRIN experiment with tritium
ArtĂculo escrito por un elevado nĂşmero de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboraciĂłn, si le hubiere, y los autores pertenecientes a la UA
First observation of tritium adsorption on graphene
In this work, we report on the first-ever studies of graphene exposed to
tritium gas in a controlled environment. The single layer graphene on
/Si substrate was exposed to 400 mbar of for a
total time of ~55 h. The resistivity of the graphene sample was measured
in-situ during tritium exposure using the Van der Pauw method. After the
exposure, the samples were scanned with a confocal Raman microscope to study
the effect of tritium on the graphene structure as well as the homogeneity of
spectral modifications. We found that the sheet resistance increases by three
orders of magnitude during the exposure. By Raman microscopy, we demonstrate
that the graphene film can withstand the bombardment from the beta-decay of
tritium, and primary and secondary ions. Additionally, the Raman spectra after
tritium exposure are comparable with previously observed results in
hydrogen-loading experiments carried out by other groups. By thermal annealing
we could demonstrate, using Raman spectral analysis, that the structural
changes were partially reversible. Considering all observations, we conclude
that the graphene film was at least partially tritiated during the tritium
exposure.Comment: Submitted to Nanoscale Advances (RSC), 14 pages, 4 figure
Quantitative Long-Term Monitoring of the Circulating Gases in the KATRIN Experiment Using Raman Spectroscopy.
First operation of the KATRIN experiment with tritium
Abstract
The determination of the neutrino mass is one of the major challenges in astroparticle physics today. Direct neutrino mass experiments, based solely on the kinematics of \upbeta β-decay, provide a largely model-independent probe to the neutrino mass scale. The Karlsruhe Tritium Neutrino (KATRIN) experiment is designed to directly measure the effective electron antineutrino mass with a sensitivity of 0.2eV (90% CL). In this work we report on the first operation of KATRIN with tritium which took place in 2018. During this commissioning phase of the tritium circulation system, excellent agreement of the theoretical prediction with the recorded spectra was found and stable conditions over a time period of 13 days could be established. These results are an essential prerequisite for the subsequent neutrino mass measurements with KATRIN in 2019
First operation of the KATRIN experiment with tritium
The determination of the neutrino mass is one of the major challenges in astroparticle physics today. Direct neutrino mass experiments, based solely on the kinematics of β
β
-decay, provide a largely model-independent probe to the neutrino mass scale. The Karlsruhe Tritium Neutrino (KATRIN) experiment is designed to directly measure the effective electron antineutrino mass with a sensitivity of 0.2 eV
0.2 eV
(90%
90%
CL). In this work we report on the first operation of KATRIN with tritium which took place in 2018. During this commissioning phase of the tritium circulation system, excellent agreement of the theoretical prediction with the recorded spectra was found and stable conditions over a time period of 13 days could be established. These results are an essential prerequisite for the subsequent neutrino mass measurements with KATRIN in 2019