Back to Search
Start Over
Muon-induced background in the KATRIN main spectrometer
- Source :
- Astropart.Phys., Astropart.Phys., 2019, 108, pp.40-49. ⟨10.1016/j.astropartphys.2019.01.003⟩, Astroparticle Physics
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- International audience; 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 β -particles from tritium β -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.
- Subjects :
- Speichertechnik - Abteilung Blaum
Physics - Instrumentation and Detectors
Physics::Instrumentation and Detectors
background: induced
FOS: Physical sciences
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
KATRIN
01 natural sciences
Neutrino mass
Cosmic-ray muon backgrounds
Electrostatic spectrometer
0103 physical sciences
[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]
Nuclear Experiment (nucl-ex)
Nuclear Experiment
010303 astronomy & astrophysics
scintillation counter
shielding
010308 nuclear & particles physics
shielding: magnetic
Astronomy and Astrophysics
Instrumentation and Detectors (physics.ins-det)
electron: secondary
ddc
electron: background
muon: cosmic radiation
Physics::Accelerator Physics
electron: energy spectrum
High Energy Physics::Experiment
electrostatic
muon: spectrometer
Subjects
Details
- ISSN :
- 09276505
- Volume :
- 108
- Database :
- OpenAIRE
- Journal :
- Astroparticle Physics
- Accession number :
- edsair.doi.dedup.....16eebac361232109f752119e0ab65b17