HighNESS conceptual design report: Volume II. the NNBAR experiment.
Journal article, 2024
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.
Author
V. Santoro
European Spallation Source (ESS)
Lund University
O. Abou El Kheir
University of Milano-Bicocca
D. Acharya
University of Milano-Bicocca
M. Akhyani
Swiss Federal Institute of Technology in Lausanne (EPFL)
K. H. Andersen
Oak Ridge National Laboratory
J.L. Barrow
Tel Aviv University
Massachusetts Institute of Technology (MIT)
P.M. Bentley
European Spallation Source (ESS)
M. Bernasconi
University of Milano-Bicocca
M. Bertelsen
European Spallation Source (ESS)
Y. Beßler
Forschungszentrum Jülich
A. Bianchi
European Spallation Source (ESS)
G. Brooijmans
The Fu Foundation School of Engineering and Applied Science
L.J. Broussard
Oak Ridge National Laboratory
T. Brys
European Spallation Source (ESS)
M. Busi
Paul Scherrer Institut
D. Campi
University of Milano-Bicocca
A. Chambon
Technical University of Denmark (DTU)
J. Chen
Forschungszentrum Jülich
V. Czamler
Institut Laue-Langevin
P. P. Deen
European Spallation Source (ESS)
D.D. DiJulio
European Spallation Source (ESS)
E. Dian
Mirrotron Ltd
Centre for Energy Research
L. Draskovits
Centre for Energy Research
K. Dunne
Stockholm University
M. El Barbari
Forschungszentrum Jülich
M.J. Ferreira
European Spallation Source (ESS)
P. Fierlinger
Technical University of Munich
V. T. Fröst
SWECO
B. Folsom
University of Milano-Bicocca
European Spallation Source (ESS)
U. Friman-Gayer
European Spallation Source (ESS)
A. Gaye
European Spallation Source (ESS)
G. Gorini
University of Milano-Bicocca
A. Gustafsson
SWECO
T. Gutberlet
Forschungszentrum Jülich
C. Happe
Forschungszentrum Jülich
X. Han
Spallation Neutron Source Science Center
Chinese Academy of Sciences
M. Hartl
European Spallation Source (ESS)
M. Holl
European Spallation Source (ESS)
A. Jackson
European Spallation Source (ESS)
E. Kemp
State University of Campinas
Y. Kamyshkov
University of Tennessee
T. Kittelmann
European Spallation Source (ESS)
E. Klinkby
Technical University of Denmark (DTU)
R. Kolevatov
ESS consultant
S. I. Laporte
University of Milano-Bicocca
B. Lauritzen
Technical University of Denmark (DTU)
W. Lejon
Stockholm University
R. Linander
European Spallation Source (ESS)
Mats Lindroos
European Spallation Source (ESS)
M. Marko
Centre for Energy Research
J. I. Márquez Damián
European Spallation Source (ESS)
T. C. McClanahan
Oak Ridge National Laboratory
B. Meirose
Lund University
Stockholm University
F. Mezei
Mirrotron Ltd
K. Michel
European Spallation Source (ESS)
D. Milstead
Stockholm University
G. Muhrer
European Spallation Source (ESS)
A. Nepomuceno
Fluminense Federal University
V. Neshvizhevsky
Institut Laue-Langevin
Thomas Nilsson
Chalmers, Physics
U. Odén
European Spallation Source (ESS)
Tomás S. Plivelic
MAX IV Laboratory
K. Ramic
European Spallation Source (ESS)
B. Rataj
Lund University
European Spallation Source (ESS)
I. Remec
Oak Ridge National Laboratory
N. Rizzi
Technical University of Denmark (DTU)
J. Rogers
University of Tennessee
E. Rosenthal
Forschungszentrum Jülich
L. Rosta
Centre for Energy Research
U. Rücker
Forschungszentrum Jülich
S. Samothrakitis
Paul Scherrer Institut
A. Schreyer
Helmholtz
J. R. Selknaes
European Spallation Source (ESS)
H. Shuai
Mirrotron Ltd
S. Silverstein
Stockholm University
William Snow
Indiana University
M. Strobl
Paul Scherrer Institut
M. Strothmann
Forschungszentrum Jülich
A. Takibayev
European Spallation Source (ESS)
R. Wagner
Institut Laue-Langevin
P. Willendrup
European Spallation Source (ESS)
Technical University of Denmark (DTU)
S. Xu
European Spallation Source (ESS)
S. Yiu
Stockholm University
L. Yngwe
SWECO
A. R. Young
North Carolina State University
M. Wolke
Uppsala University
P. Zakalek
Forschungszentrum Jülich
L. Zavorka
Oak Ridge National Laboratory
L. Zanini
European Spallation Source (ESS)
O. Zimmer
Institut Laue-Langevin
Journal of Neutron Research
1023-8166 (ISSN) 1477-2655 (eISSN)
Vol. 25 3-4 315-406Subject Categories
Accelerator Physics and Instrumentation
Subatomic Physics
DOI
10.3233/JNR-230951