S
S. Komposch
Researcher at Paul Scherrer Institute
Publications - 14
Citations - 324
S. Komposch is an academic researcher from Paul Scherrer Institute. The author has contributed to research in topics: Ultracold neutrons & Neutron electric dipole moment. The author has an hindex of 11, co-authored 14 publications receiving 308 citations. Previous affiliations of S. Komposch include ETH Zurich.
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Journal ArticleDOI
Search for axion-like dark matter through nuclear spin precession in electric and magnetic fields
C. Abel,N. J. Ayres,G. Ban,Georg Bison,Kazimierz Bodek,V. Bondar,M. Daum,Malcolm Fairbairn,Victor V. Flambaum,P. Geltenbort,K. Green,W. C. Griffith,M. G. D. van der Grinten,Zoran D. Grujić,Philip Harris,Nora Hild,Plamen Iaydjiev,S. N. Ivanov,Malgorzata Kasprzak,Y. Kermaidic,Klaus Kirch,H.-C. Koch,S. Komposch,P. A. Koss,A. Kozela,J. Krempel,Bernhard Lauss,T. Lefort,Y. Lemière,David J. E. Marsh,Prajwal Mohanmurthy,A. Mtchedlishvili,M. Musgrave,Florian M. Piegsa,Guillaume Pignol,M. Rawlik,D. Rebreyend,D. Ries,S. Roccia,D. Rozpedzik,Philipp Schmidt-Wellenburg,Nathal Severijns,D. Shiers,Yevgeny V. Stadnik,Antoine Weis,E. Wursten,Jacek Zejma,Geza Zsigmond +47 more
TL;DR: In this paper, the axion-wind spin-precession frequencies of stored ultracold neutrons and $199$Hg atoms for an axion induced oscillating electric dipole moment of the neutron and axion wind spin precession effect were analyzed.
Journal ArticleDOI
Constraining interactions mediated by axion-like particles with ultracold neutrons
S. Afach,S. Afach,G. Ban,Georg Bison,Kazimierz Bodek,Martin Burghoff,M. Daum,Martin Fertl,Martin Fertl,B. Franke,B. Franke,Zoran D. Grujić,V. Hélaine,V. Hélaine,Malgorzata Kasprzak,Y. Kermaidic,Klaus Kirch,Klaus Kirch,Paul E. Knowles,H.-C. Koch,H.-C. Koch,S. Komposch,S. Komposch,A. Kozela,J. Krempel,Bernhard Lauss,T. Lefort,Y. Lemière,A. Mtchedlishvili,Oscar Naviliat-Cuncic,Florian M. Piegsa,Guillaume Pignol,P. N. Prashanth,G. Quéméner,D. Rebreyend,D. Ries,D. Ries,S. Roccia,P. Schmidt-Wellenburg,Allard Schnabel,Nathal Severijns,Jens-Uwe Voigt,Antoine Weis,G. Wyszynski,G. Wyszynski,Jacek Zejma,J. Zenner,Geza Zsigmond +47 more
TL;DR: In this article, a new limit on a possible short range spin-dependent interaction from the precise measurement of the ratio of Larmor precession frequencies of stored ultracold neutrons and Hg-199 atoms confined in the same volume was reported.
Journal ArticleDOI
A device for simultaneous spin analysis of ultracold neutrons
S. Afach,G. Ban,Georg Bison,Kazimierz Bodek,Z. Chowdhuri,M. Daum,Martin Fertl,B. Franke,P. Geltenbort,Zoran D. Grujić,L. Hayen,V. Hélaine,V. Hélaine,Reinhold Henneck,Malgorzata Kasprzak,Y. Kermaidic,Klaus Kirch,S. Komposch,A. Kozela,J. Krempel,Bernhard Lauss,T. Lefort,Y. Lemière,A. Mtchedlishvili,Oscar Naviliat-Cuncic,Florian M. Piegsa,Guillaume Pignol,P. N. Prashanth,P. N. Prashanth,G. Quéméner,M. Rawlik,D. Ries,D. Rebreyend,S. Roccia,D. Rozpedzik,P. Schmidt-Wellenburg,Natalis Severijns,Antoine Weis,E. Wursten,G. Wyszynski,Jacek Zejma,Geza Zsigmond +41 more
TL;DR: In this article, the authors report on the design and first tests of a device allowing for measurement of ultracold neutrons polarisation by means of the simultaneous analysis of the two spin components.
Journal ArticleDOI
Measurement of a false electric dipole moment signal from 199Hg atoms exposed to an inhomogeneous magnetic field
S. Afach,S. Afach,C.A. Baker,G. Ban,Georg Bison,Kazimierz Bodek,Z. Chowdhuri,M. Daum,Martin Fertl,Martin Fertl,B. Franke,B. Franke,P. Geltenbort,K. Green,K. Green,M. G. D. van der Grinten,Zoran D. Grujić,Philip Harris,Werner Heil,V. Hélaine,V. Hélaine,Reinhold Henneck,M. Horras,M. Horras,P. Iaydjiev,S. N. Ivanov,Malgorzata Kasprzak,Y. Kermaidic,Klaus Kirch,Klaus Kirch,Paul E. Knowles,H.-C. Koch,H.-C. Koch,S. Komposch,S. Komposch,A. Kozela,J. Krempel,Bernhard Lauss,T. Lefort,Y. Lemière,A. Mtchedlishvili,Oscar Naviliat-Cuncic,J. M. Pendlebury,Florian M. Piegsa,Guillaume Pignol,P. N. Prashant,P. N. Prashant,G. Quéméner,D. Rebreyend,D. Ries,S. Roccia,P. Schmidt-Wellenburg,Nathal Severijns,Antoine Weis,E. Wursten,G. Wyszynski,G. Wyszynski,Jacek Zejma,J. Zenner,J. Zenner,Geza Zsigmond +60 more
TL;DR: In this paper, the Larmor frequency shift proportional to the electric-field strength for 199Hg atoms contained in a volume permeated with aligned magnetic and electric fields was measured.
Journal ArticleDOI
Optically pumped Cs magnetometers enabling a high-sensitivity search for the neutron electric dipole moment
C. Abel,S. Afach,N. J. Ayres,G. Ban,Georg Bison,Kazimierz Bodek,V. Bondar,E. Chanel,P. J. Chiu,Christopher Crawford,Z. Chowdhuri,M. Daum,S. Emmenegger,L. Ferraris-Bouchez,Martin Fertl,Beatrice Franke,W. C. Griffith,Zoran D. Grujić,L. Hayen,V. Hélaine,Nora Hild,Malgorzata Kasprzak,Y. Kermaidic,Klaus Kirch,Paul E. Knowles,H.-C. Koch,S. Komposch,P. A. Koss,A. Kozela,J. Krempel,B. Lauss,T. Lefort,Y. Lemière,A. Leredde,A. Mtchedlishvili,Prajwal Mohanmurthy,M. Musgrave,Oscar Naviliat-Cuncic,D. Pais,A. S. Pazgalev,Florian M. Piegsa,E. Pierre,Guillaume Pignol,P. N. Prashanth,G. Quéméner,M. Rawlik,D. Rebreyend,D. Ries,S. Roccia,D. Rozpedzik,Philipp Schmidt-Wellenburg,Allard Schnabel,Nathal Severijns,R. Tavakoli Dinani,J. A. Thorne,Antoine Weis,E. Wursten,G. Wyszynski,Jacek Zejma,Geza Zsigmond +59 more
Abstract: An array of 16 laser-pumped scalar Cs magnetometers was part of the neutron electric dipole moment (nEDM) experiment taking data at the Paul Scherrer Institute in 2015 and 2016. It was deployed to measure the gradients of the experiment's magnetic field and to monitor their temporal evolution. The originality of the array lies in its compact design, in which a single near-infrared diode laser drives all magnetometers that are located in a high-vacuum chamber, with a selection of the sensors mounted on a high-voltage electrode. We describe details of the Cs sensors' construction and modes of operation, emphasizing the accuracy and sensitivity of the magnetic-field readout. We present two applications of the magnetometer array directly beneficial to the nEDM experiment: (i) the implementation of a strategy to correct for the drift of the vertical magnetic-field gradient and (ii) a procedure to homogenize the magnetic field. The first reduces the uncertainty of the nEDM result. The second enables transverse neutron spin relaxation times exceeding 1500 s, improving the statistical sensitivity of the nEDM experiment by about 35% and effectively increasing the rate of nEDM data taking by a factor of 1.8.