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Measurement of the inhomogeneity of the KATRIN tritium source electric potential by high-resolution spectroscopy of conversion electrons from $$\mathbf {^{83m}}$$Kr

Journal Article · · European Physical Journal. C, Particles and Fields (Online)
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  1. University of North Carolina
  2. Karlsruhe Institute of Technology (KIT)
  3. University of Münster
  4. Istituto Nazionale di Fisica Nucleare (INFN)-Sezione di Milano-Bicocca
  5. Politecnico di Milano, Dipartimento di Elettronica, Informazione e Bioingegneria; Istituto Nazionale di Fisica Nucleare (INFN)-Sezione di Milano
  6. Chulalongkorn University
  7. Carnegie Mellon University
  8. Czech Academy of Sciences
  9. Technical University of Munich
  10. University of Wuppertal
  11. University of Washington
  12. Massachusetts Institute of Technology
  13. Istituto Nazionale di Fisica Nucleare (INFN)-Sezione di Milano-Bicocca; Università di Milano-Bicocca
  14. University of North Carolina; Triangle Universities Nuclear Laboratory
  15. Max Planck Institute for Physics
  16. Suranaree University of Technology
  17. Technical University of Munich; Max-Planck-Institut für Kernphysik
  18. IRFU (DPhP & APC), CEA, Université Paris-Saclay
  19. Lawrence Berkeley National Laboratory
  20. University of North Carolina; Triangle Universities Nuclear Laboratory; Duke University
  21. Carnegie Mellon University; Washington and Jefferson College
  22. Universidad Autonoma de Madrid
  23. Humboldt-Universität zu Berlin
  24. Czech Academy of Sciences; Max Planck Institute for Physics
  25. University of North Carolina; Karlsruhe Institute of Technology (KIT)
  26. University of Münster; Humboldt-Universität zu Berlin
  27. University of Heidelberg
  28. Johannes-Gutenberg-Universität Mainz
  29. University of North Carolina; Triangle Universities Nuclear Laboratory; Also affiliated with Oak Ridge National Laboratory

Precision spectroscopy of the electron spectrum of the tritium β-decay near the kinematic endpoint is a direct method to determine the effective electron antineutrino mass. The KArlsruhe TRItium Neutrino (KATRIN) experiment aims to determine this quantity with a sensitivity of better than 0.3 eV (90% C.L.). An inhomogeneous electric potential in the tritium source of KATRIN can lead to distortions of the β-spectrum, which directly impact the neutrino-mass observable. This effect can be quantified through precision spectroscopy of the conversion-electrons of co-circulated metastable 83mKr. Therefore, dedicated, several-weeks long measurement campaigns have been performed within the KATRIN data taking schedule. In this work, we infer the tritium source potential observables from these measurements, and present their implications for the neutrino-mass determination.

Research Organization:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
SC0011091; AC02-05CH11231; FG02-97ER41041; FG02-94ER40818; FG02-97ER41020; FG02-97ER41033; SC0004036; SC0019304
OSTI ID:
3004035
Alternate ID(s):
OSTI ID: 2572059
OSTI ID: 2583311
OSTI ID: 3001363
OSTI ID: 3001834
Journal Information:
European Physical Journal. C, Particles and Fields (Online), Journal Name: European Physical Journal. C, Particles and Fields (Online) Journal Issue: 7 Vol. 85; ISSN 1434-6052
Publisher:
Springer NatureCopyright Statement
Country of Publication:
United States
Language:
English

References (34)

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The Windowless Gaseous Tritium Source (WGTS) of the KATRIN experiment journal September 2017
Properties of 83 m Kr conversion electrons and their use in the KATRIN experiment journal February 2018
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Wideband precision stabilization of the -18.6kV retarding voltage for the KATRIN spectrometer journal June 2022
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Quantitative Long-Term Monitoring of the Circulating Gases in the KATRIN Experiment Using Raman Spectroscopy journal August 2020
Direct neutrino-mass measurement based on 259 days of KATRIN data preprint June 2024
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Modeling and measurement of Rydberg-State mediated Background at the KATRIN Main Spectrometer text January 2019
Ion and plasma systematics during the first KATRIN neutrino mass measurements dissertation November 2020
A Phenomenological Theory of KATRIN Source Potential Systematics and its Application in Krypton-83m Calibration Measurements text January 2021
Simulation of the KATRIN Source Plasma using Monte Carlo and Particle in Cell Methods dissertation March 2022
KATRIN design report 2004 text January 2005

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