Reduction of stored-particle background by a magnetic pulse method at the KATRIN experiment
Abstract
The KATRIN experiment aims to determine the effective electron neutrino mass with a sensitivity of (90\% C.L.) by precision measurement of the shape of the tritium \textbeta-spectrum in the endpoint region. The energy analysis of the decay electrons is achieved by a MAC-E filter spectrometer. A common background source in this setup is the decay of short-lived isotopes, such as Rn and Rn, in the spectrometer volume. Active and passive countermeasures have been implemented and tested at the KATRIN main spectrometer. One of these is the magnetic pulse method, which employs the existing air coil system to reduce the magnetic guiding field in the spectrometer on a short timescale in order to remove low- and high-energy stored electrons. Here we describe the working principle of this method and present results from commissioning measurements at the main spectrometer. Simulations with the particle-tracking software Kassiopeia were carried out to gain a detailed understanding of the electron storage conditions and removal processes.
Keywords
Cite
@article{arxiv.1805.01163,
title = {Reduction of stored-particle background by a magnetic pulse method at the KATRIN experiment},
author = {KATRIN Collaboration and M. Arenz and W. -J. Baek and S. Bauer and M. Beck and A. Beglarian and J. Behrens and R. Berendes and T. Bergmann and A. Berlev and U. Besserer and K. Blaum and T. Bode and B. Bornschein and L. Bornschein and T. Brunst and W. Buglak 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 D. Furse and W. Gil and F. Glück and A. Gonzalez Urena 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 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 J. Letnev 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. G. H. Robertson and F. Roccati and C. Rodenbeck and M. Röllig and C. Röttele 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 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},
journal= {arXiv preprint arXiv:1805.01163},
year = {2018}
}
Comments
16 pages, 9 figures, 4 tables