Muon-induced background in the KATRIN main spectrometer
Abstract
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. It investigates the kinematics of -particles from tritium -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 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 ( confidence level) of the overall MS background.
Cite
@article{arxiv.1805.12173,
title = {Muon-induced background in the KATRIN main spectrometer},
author = {K. Altenmüller and M. Arenz and W. -J. Baek and M. Beck and A. Beglarian and J. Behrens and T. Bergmann and A. Berlev and U. Besserer and K. Blaum and S. Bobien and T. Bode and B. Bornschein and L. Bornschein and T. Brunst and N. Buzinsky and S. Chilingaryan and W. Q. Choi and M. Deffert and P. J. Doe and O. Dragoun and G. Drexlin and S. Dyba and F. Edzards and K. Eitel and E. Ellinger and R. Engel and S. Enomoto and M. Erhard and D. Eversheim and M. Fedkevych and J. A. Formaggio and F. M. Fränkle and G. B. Franklin and F. Friedel and A. Fulst and W. Gil and F. Glück and A. Gonzalez Ureña and S. Grohmann and R. Grössle and R. Gumbsheimer and M. Hackenjos and V. Hannen and F. Harms and N. Haußmann and F. Heizmann and K. Helbing and W. Herz and S. Hickford and D. Hilk and D. Hillesheimer and M. A. Howe and A. Huber and A. Jansen and J. Kellerer and N. Kernert and L. Kippenbrock and M. Kleesiek and M. Klein and A. Kopmann and M. Korzeczek and A. Kovalík and B. Krasch and M. Kraus and L. Kuckert and T. Lasserre and O. Lebeda and B. Leiber and J. Letnev and J. Linek and A. Lokhov and M. Machatschek and A. Marsteller and E. L. Martin and S. Mertens and S. Mirz and B. Monreal and H. Neumann and S. Niemes and A. Off and A. Osipowicz and E. Otten and D. S. Parno and A. Pollithy and A. W. P. Poon and F. Priester and P. C. -O. Ranitzsch and O. Rest and R. Rink and R. G. H. Robertson and F. Roccati and C. Rodenbeck and M. Röllig and C. Röttele and P. Rovedo and M. Ryšavý and R. Sack and A. Saenz and L. Schimpf and K. Schlösser and M. Schlösser and K. Schönung and M. Schrank and H. Seitz-Moskaliuk and J. Sentkerestiová and V. Sibille and M. Slezák and M. Steidl and N. Steinbrink and M. Sturm and M. Suchopar and M. Suesser and H. H. Telle and L. A. Thorne and T. Thümmler and N. Titov and I. Tkachev and N. Trost and K. Valerius and D. Vénos and R. Vianden and A. P. Vizcaya Hernández and N. Wandkowsky and M. Weber and C. Weinheimer and C. Weiss and S. Welte and J. Wendel and J. F. Wilkerson and J. Wolf and S. Wüstling and S. Zadoroghny and G. Zeller},
journal= {arXiv preprint arXiv:1805.12173},
year = {2019}
}