Suppression of Penning discharges between the KATRIN spectrometers
Abstract
The KArlsruhe TRItium Neutrino experiment (KATRIN) aims to determine the effective electron (anti)neutrino mass with a sensitivity of (90 C.L.) by precisely measuring the endpoint region of the tritium -decay spectrum. It uses a tandem of electrostatic spectrometers working as MAC-E (magnetic adiabatic collimation combined with an electrostatic) filters. In the space between the pre-spectrometer and the main spectrometer, an unavoidable Penning trap is created when the superconducting magnet between the two spectrometers, biased at their respective nominal potentials, is energized. The electrons accumulated in this trap can lead to discharges, which create additional background electrons and endanger the spectrometer and detector section downstream. To counteract this problem, "electron catchers" were installed in the beamline inside the magnet bore between the two spectrometers. These catchers can be moved across the magnetic-flux tube and intercept on a sub-ms time scale the stored electrons along their magnetron motion paths. In this paper, we report on the design and the successful commissioning of the electron catchers and present results on their efficiency in reducing the experimental background.
Keywords
Cite
@article{arxiv.1911.09633,
title = {Suppression of Penning discharges between the KATRIN spectrometers},
author = {M. Aker and K. Altenmüller and A. Beglarian and J. Behrens and A. Berlev and U. Besserer and K. Blaum and F. Block and S. Bobien and B. Bornschein and L. Bornschein and H. Bouquet and T. Brunst and T. S. Caldwell and S. Chilingaryan and W. Choi and K. Debowski and M. Deffert and M. Descher and D. Díaz Barrero and P. J. Doe and O. Dragoun and G. Drexlin and S. Dyba and K. Eitel and E. Ellinger and R. Engel and S. Enomoto and D. Eversheim and M. Fedkevych and A. Felden and J. A. Formaggio and F. Fränkle and G. B. Franklin and H. Frankrone and F. Friedel and A. Fulst and K. Gauda and W. Gil and F. Glück and S. Grohmann and R. Grössle and R. Gumbsheimer and M. Hackenjos and V. Hannen and J. Hartmann and N. Haußmann and F. Heizmann and J. Heizmann and K. Helbing and S. Hickford and D. Hillesheimer and D. Hinz and T. Höhn and B. Holzapfel and S. Holzmann and T. Houdy and A. Jansen and C. Karl and J. Kellerer and N. Kernert and L. Kippenbrock and M. Klein and C. Köhler and L. Köllenberger and A. Kopmann and M. Korzeczek and A. Kovalík and B. Krasch and H. Krause and B. Kuffner and N. Kunka and T. Lasserre and L. La Cascio and O. Lebeda and B. Lehnert and J. Letnev and F. Leven and T. L. Le and S. Lichter and A. Lokhov and M. Machatschek and E. Malcherek and A. Marsteller and E. L. Martin and C. Melzer and A. Menshikov and S. Mertens and B. Monreal and K. Müller and U. Naumann and H. Neumann and S. Niemes and M. Noe and H. -W. Ortjohann and A. Osipowicz and E. Otten and D. S. Parno and A. Pollithy and A. W. P. Poon and J. M. L. Poyato and F. Priester and P. C. -O. Ranitzsch and O. Rest and R. Rinderspacher and R. G. H. Robertson and C. Rodenbeck and P. Rohr and M. Röllig and C. Röttele and M. Ryšavý and R. Sack and A. Saenz and P. Schäfer and L. Schimpf and K. Schlösser and M. Schlösser and L. Schlüter and M. Schrank and B. Schulz and H. Seitz-Moskaliuk and W. Seller and V. Sibille and D. Siegmann and M. Slezák and F. Spanier and M. Steidl and M. Steven and M. Sturm and M. Suesser and M. Sun and D. Tcherniakhovski 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 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 W. Xu and Y. -R. Yen and S. Zadoroghny and G. Zeller},
journal= {arXiv preprint arXiv:1911.09633},
year = {2020}
}
Comments
- 12 pages, 14 figures, LaTeX; typos corrected, references added; precised a few arguments, added additional discussions, results unchanged