Česky
English
Výbor pro spolupráci ČR se Spojeným ústavem jaderných výzkumů Přihlášení
Muon-induced background in the KATRIN main spectrometer

Autor
Arenz M. University of Bonn, Germany
Dragoun Otokar, Ing. DrSc.  Ústav jaderné fyziky AV ČR
Kovalík Alojz, Ing. DrSc. Ústav jaderné fyziky AV ČR, SÚJV Dubna
Vénos Drahoslav, Mgr. CSc. Ústav jaderné fyziky AV ČR
et al.  různé instituce

Rok
2019

Časopis
ASTROPARTICLE PHYSICS 108 40-49

Web


Obsah
The KArlsruhe TRItium Neutrino (KATRIN) experiment aims to make a model-independent determination of the effective electron antineutrino mass with a sensitivity of 0.2 eV/c(2). It investigates the kinematics of beta-particles from tritium beta-decay close to the endpoint of the energy spectrum. Because the KATRIN main spectrometer (MS) is located above ground, muon-induced backgrounds are of particular concern. Coincidence measurements with the MS and a scintillator-based muon detector system confirmed the model of secondary electron production by cosmic-ray muons inside the MS. Correlation measurements with the same setup showed that about 12% of secondary electrons emitted from the inner surface are induced by cosmic-ray muons, with approximately one secondary electron produced for every 17 muon crossings. However, the magnetic and electrostatic shielding of the MS is able to efficiently suppress these electrons, and we find that muons are responsible for less than 17% (90% confidence level) of the overall MS background. (C) 2019 The Authors. Published by Elsevier B.V.

Příklad citace článku:
M. Arenz, O. Dragoun, A. Kovalík, D. Vénos, . et al., "Muon-induced background in the KATRIN main spectrometer ", ASTROPARTICLE PHYSICS 108 40-49 (2019)