HighNESS conceptual design report: Volume II. The NNBAR experiment.-Reference-Cited by-同舟云学术

HighNESS conceptual design report: Volume II. The NNBAR experiment.

Published:2024-05-03 Issue:3-4 Volume:25 Page:315-406
ISSN:1477-2655
Container-title:Journal of Neutron Research
language:
Short-container-title:JNR

Author:

Santoro V.¹²,Abou El Kheir O.³,Acharya D.³,Akhyani M.⁴,Andersen K.H.⁵,Barrow J.⁶⁷,Bentley P.¹,Bernasconi M.³,Bertelsen M.¹,Beßler Y.⁸,Bianchi A.¹,Brooijmans G.⁹,Broussard L.⁵,Brys T.¹,Busi M.¹⁰,Campi D.³,Chambon A.¹¹,Chen J.⁸,Czamler V.¹²,Deen P.¹,DiJulio D.D.¹,Dian E.¹³¹⁴,Draskovits L.¹⁴,Dunne K.¹⁵,El Barbari M.⁸,Ferreira M.J.¹,Fierlinger P.¹⁶,Fröst V.T.¹⁷,Folsom B.T.¹³,Friman-Gayer U.¹,Gaye A.¹,Gorini G.³,Gustafsson A.¹⁷,Gutberlet T.⁸,Happe C.⁸,Han X.¹⁸¹⁹²⁰,Hartl M.¹,Holl M.¹,Jackson A.¹,Kemp E.²¹,Kamyshkov Y.²²,Kittelmann T.¹,Klinkby E.B.¹¹,Kolevatov R.²³,Laporte S.I.³,Lauritzen B.¹¹,Lejon W.¹⁵,Linander R.¹,Lindroos M.¹,Marko M.¹⁴,Márquez Damián J.I.¹,McClanahan T.C.⁵,Meirose B.¹⁵²,Mezei F.¹³,Michel K.¹,Milstead D.¹⁵,Muhrer G.¹,Nepomuceno A.²⁴,Neshvizhevsky V.¹²,Nilsson T.²⁵,Odén U.¹,Plivelic T.²⁶,Ramic K.¹,Rataj B.¹²,Remec I.⁵,Rizzi N.¹¹,Rogers J.²²,Rosenthal E.⁸,Rosta L.¹⁴,Rücker U.⁸,Samothrakitis S.¹⁰,Schreyer A.²⁷,Selknaes J.R.¹,Shuai H.¹³,Silverstein S.¹⁵,Snow W.M.²⁸,Strobl M.¹⁰,Strothmann M.⁸,Takibayev A.¹,Wagner R.¹²,Willendrup P.¹¹¹,Xu S.¹,Yiu S.C.¹⁵,Yngwe L.¹⁷,Young A.R.²⁹,Wolke M.³⁰,Zakalek P.⁸,Zavorka L.⁵,Zanini L.¹,Zimmer O.¹²

Affiliation:

1. European Spallation Source ERIC, Lund, Sweden

2. Lund University, Lund, Sweden

3. University of Milano-Bicocca, Milano, Italy

4. École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland

5. Oak Ridge National Laboratory, Oak Ridge, USA

6. Massachusetts Institute of Technology (MIT), Cambridge, USA

7. Tel Aviv University, Tel Aviv, Israel

8. Forschungszentrum Jülich GmbH, Jülich, Germany

9. Department of Physics, Columbia University, New York, USA

10. Paul Scherrer Institut (PSI), Villigen, Switzerland

11. DTU Physics, Technical University of Denmark, Lyngby, Denmark

12. Institut Laue-Langevin ILL, Grenoble, France

13. Mirrotron Ltd., Budapest, Hungary

14. Centre for Energy Research, Budapest, Hungary

15. Stockholm University, Stockholm, Sweden

16. Technical University of Munich, Garching, Germany

17. Sweco AB, Malmö, Sweden

18. Institute of High Energy Physics, Chinese Academy of Science, Beijing, 100049, China

19. University of Chinese Academy of Science, Beijing, 100049, China

20. Spallation neutron source science center, Dongguan, 523803, Guangdong, China

21. State University of Campinas, Campinas, Brazil

22. University of Tennessee, Knoxville, USA

23. ESS consultant, Oslo, Norway

24. Departamento de Ciências da Natureza, Universidade Federal Fluminense, Niterói, Brazil

25. Institutionen för Fysik, Chalmers Tekniska Högskola, Sweden

26. MAX IV Synchrotron, Lund University, Lund, Sweden

27. Helmholtz-Zentrum hereon GmbH, Geesthacht, Germany

28. Department of Physics, Indiana University, Bloomington, USA

29. Department of Physics, North Carolina State University, Raleigh, USA

30. Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden

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.

Publisher

IOS Press

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