Muon-induced background in the KATRIN main spectrometer

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ID: 112569
2019
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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/c2. 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.
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Authors K. Altenmüller,M. Arenz,W.-J. Baek,M. Beck,A. Beglarian,Jan D. Behrens,T. Bergmann,A. Berlev,U. Besserer,K. Blaum,S. Bobien,T. Bode,B. Bornschein,L. Bornschein,T. Brunst,N. Buzinsky,S. Chilingaryan,W.Q. Choi,M. Deffert,P.J. Doe,O. Dragoun,G. Drexlin,S. Dyba,F. Edzards,K. Eitel,E. Ellinger,R. Engel,S. Enomoto,M. Erhard,D. Eversheim,M. Fedkevych,J.A. Formaggio,F.M. Fränkle,G.B. Franklin,F. Friedel,A. Fulst,W. Gil,F. Glück,A. Gonzalez Ureña,S. Grohmann,R. Grössle,R. Gumbsheimer,M. Hackenjos,V. Hannen,F. Harms,N. Haußmann,F. Heizmann,K. Helbing,W. Herz,S. Hickford,D. Hilk,D. Hillesheimer,M.A. Howe,A. Huber,A. Jansen,J. Kellerer,N. Kernert,L. Kippenbrock,M. Kleesiek,M. Klein,Andreas Kopmann,M. Korzeczek,A. Kovalík,B. Krasch,M. Kraus,L. Kuckert,T. Lasserre,Ondřej Lebeda,B. Leiber,J. Letnev,J. Linek,A. Lokhov,M. Machatschek,A. Marsteller,E.L. Martin,S. Mertens,S. Mirz,B. Monreal,H. Neumann,S. Niemes,A. Off,A. Osipowicz,E. Otten,D.S. Parno,A. Pollithy,A.W.P. Poon,F. Priester,P.C.-O. Ranitzsch,O. Rest,R. Rink,R.G.H. Robertson,F. Roccati,C. Rodenbeck,M. Röllig,C. Röttele,P. Rovedo,M. Ryšavý,R. Sack,A. Saenz,L. Schimpf,K. Schlösser,M. Schlösser,K. Schönung,M. Schrank,H. Seitz-Moskaliuk,J. Sentkerestiová,V. Sibille,M. Slezák,M. Steidl,N. Steinbrink,M. Sturm,M. Suchopar,M. Suesser,H.H. Telle,L.A. Thorne,T. Thümmler,N. Titov,I. Tkachev,N. Trost,K. Valerius,D. Vénos,R. Vianden,A.P. Vizcaya Hernández,N. Wandkowsky,M. Weber,C. Weinheimer,C. Weiss,S. Welte,J. Wendel,J.F. Wilkerson,J. Wolf,S. Wüstling,S. Zadoroghny,G. Zeller;K. Altenmüller;M. Arenz;W.-J. Baek;M. Beck;A. Beglarian;Jan D. Behrens;T. Bergmann;A. Berlev;U. Besserer;K. Blaum;S. Bobien;T. Bode;B. Bornschein;L. Bornschein;T. Brunst;N. Buzinsky;S. Chilingaryan;W.Q. Choi;M. Deffert;P.J. Doe;O. Dragoun;G. Drexlin;S. Dyba;F. Edzards;K. Eitel;E. Ellinger;R. Engel;S. Enomoto;M. Erhard;D. Eversheim;M. Fedkevych;J.A. Formaggio;F.M. Fränkle;G.B. Franklin;F. Friedel;A. Fulst;W. Gil;F. Glück;A. Gonzalez Ureña;S. Grohmann;R. Grössle;R. Gumbsheimer;M. Hackenjos;V. Hannen;F. Harms;N. Haußmann;F. Heizmann;K. Helbing;W. Herz;S. Hickford;D. Hilk;D. Hillesheimer;M.A. Howe;A. Huber;A. Jansen;J. Kellerer;N. Kernert;L. Kippenbrock;M. Kleesiek;M. Klein;Andreas Kopmann;M. Korzeczek;A. Kovalík;B. Krasch;M. Kraus;L. Kuckert;T. Lasserre;Ondřej Lebeda;B. Leiber;J. Letnev;J. Linek;A. Lokhov;M. Machatschek;A. Marsteller;E.L. Martin;S. Mertens;S. Mirz;B. Monreal;H. Neumann;S. Niemes;A. Off;A. Osipowicz;E. Otten;D.S. Parno;A. Pollithy;A.W.P. Poon;F. Priester;P.C.-O. Ranitzsch;O. Rest;R. Rink;R.G.H. Robertson;F. Roccati;C. Rodenbeck;M. Röllig;C. Röttele;P. Rovedo;M. Ryšavý;R. Sack;A. Saenz;L. Schimpf;K. Schlösser;M. Schlösser;K. Schönung;M. Schrank;H. Seitz-Moskaliuk;J. Sentkerestiová;V. Sibille;M. Slezák;M. Steidl;N. Steinbrink;M. Sturm;M. Suchopar;M. Suesser;H.H. Telle;L.A. Thorne;T. Thümmler;N. Titov;I. Tkachev;N. Trost;K. Valerius;D. Vénos;R. Vianden;A.P. Vizcaya Hernández;N. Wandkowsky;M. Weber;C. Weinheimer;C. Weiss;S. Welte;J. Wendel;J.F. Wilkerson;J. Wolf;S. Wüstling;S. Zadoroghny;G. Zeller;
Journal astroparticle physics
Year 2019
DOI
10.1016/j.astropartphys.2019.01.003
URL
https://sciprofiles.com/publication/view/4276799e93056736283472ce4c3beec7
Keywords
neutrino mass electrostatic spectrometer cosmic-ray muon backgrounds

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