Authors: Santoro, V. | Abou El Kheir, O. | Acharya, D. | Akhyani, M. | Andersen, K.H. | Barrow, J. | Bentley, P. | Bernasconi, M. | Bertelsen, M. | Beßler, Y. | Bianchi, A. | Brooijmans, G. | Broussard, L. | Brys, T. | Busi, M. | Campi, D. | Chambon, A. | Chen, J. | Czamler, V. | Deen, P. | DiJulio, D.D. | Dian, E. | Draskovits, L. | Dunne, K. | El Barbari, M. | Ferreira, M.J. | Fierlinger, P. | Fröst, V.T. | Folsom, B.T. | Friman-Gayer, U. | Gaye, A. | Gorini, G. | Gustafsson, A. | Gutberlet, T. | Happe, C. | Han, X. | Hartl, M. | Holl, M. | Jackson, A. | Kemp, E. | Kamyshkov, Y. | Kittelmann, T. | Klinkby, E.B. | Kolevatov, R. | Laporte, S.I. | Lauritzen, B. | Lejon, W. | Linander, R. | Lindroos, M. | Marko, M. | Márquez Damián, J.I. | McClanahan, T.C. | Meirose, B. | Mezei, F. | Michel, K. | Milstead, D. | Muhrer, G. | Nepomuceno, A. | Neshvizhevsky, V. | Nilsson, T. | Odén, U. | Plivelic, T. | Ramic, K. | Rataj, B. | Remec, I. | Rizzi, N. | Rogers, J. | Rosenthal, E. | Rosta, L. | Rücker, U. | Samothrakitis, S. | Schreyer, A. | Selknaes, J.R. | Shuai, H. | Silverstein, S. | Snow, W.M. | Strobl, M. | Strothmann, M. | Takibayev, A. | Wagner, R. | Willendrup, P. | Xu, S. | Yiu, S.C. | Yngwe, L. | Young, A.R. | Wolke, M. | Zakalek, P. | Zavorka, L. | Zanini, L. | Zimmer, O.
Article Type:
Research Article
Abstract:
A key aim of the HighNESS project for the European Spallation Source is to enable cutting-edge particle physics experiments. This volume presents a conceptual design report for the NNBAR experiment. NNBAR would exploit a new cold lower moderator to make the first search in over thirty years for free neutrons converting to anti-neutrons. The observation of such a baryon-number-violating signature would be of fundamental significance and tackle open questions in modern physics, including the origin of the matter-antimatter asymmetry. This report shows the design of the beamline, supermirror focusing system, magnetic and radiation shielding, and anti-neutron detector necessary for the
…experiment. A range of simulation programs are employed to quantify the performance of the experiment and show how background can be suppressed. For a search with full background suppression, a sensitivity improvement of three orders of magnitude is expected, as compared with the previous search. Civil engineering studies for the NNBAR beamline are also shown, as is a costing model for the experiment.
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DOI: 10.3233/JNR-230951
Citation: Journal of Neutron Research,
vol. Pre-press, no. Pre-press, pp. 1-92, 2024