H
H.-C. Koch
Researcher at University of Mainz
Publications - 24
Citations - 919
H.-C. Koch is an academic researcher from University of Mainz. The author has contributed to research in topics: Magnetic field & Neutron. The author has an hindex of 13, co-authored 24 publications receiving 826 citations. Previous affiliations of H.-C. Koch include University of Fribourg & Paul Scherrer Institute.
Papers
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Journal ArticleDOI
Revised experimental upper limit on the electric dipole moment of the neutron
J. M. Pendlebury,S. Afach,N. J. Ayres,C.A. Baker,G. Ban,Georg Bison,Kazimierz Bodek,Martin Burghoff,P. Geltenbort,K. Green,W. C. Griffith,M. G. D. van der Grinten,Zoran D. Grujić,Philip Harris,V. Hélaine,P. Iaydjiev,S. N. Ivanov,Malgorzata Kasprzak,Y. Kermaidic,Klaus Kirch,H.-C. Koch,S. Komposch,A. Kozela,J. Krempel,Bernhard Lauss,T. Lefort,Y. Lemière,D. J. R. May,M. Musgrave,Oscar Naviliat-Cuncic,Florian M. Piegsa,Guillaume Pignol,P. N. Prashanth,G. Quéméner,M. Rawlik,D. Rebreyend,J. D. Richardson,D. Ries,S. Roccia,D. Rozpedzik,Allard Schnabel,P. Schmidt-Wellenburg,Nathal Severijns,D. Shiers,J. A. Thorne,Antoine Weis,Oliver James Winston,E. Wursten,Jacek Zejma,Geza Zsigmond +49 more
TL;DR: In this paper, a detailed and comprehensive analysis of the experimental results that set the current world sensitivity limit on the magnitude of the electric dipole moment (EDM) of the neutron is presented.
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
A measurement of the neutron to 199Hg magnetic moment ratio
S. Afach,S. Afach,C.A. Baker,G. Ban,Georg Bison,Kazimierz Bodek,Martin Burghoff,Z. Chowdhuri,M. Daum,Martin Fertl,Martin Fertl,B. Franke,B. Franke,P. Geltenbort,K. Green,K. Green,M. G. D. van der Grinten,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,Andreas Knecht,H.-C. Koch,H.-C. Koch,J. Krempel,M. Kuźniak,M. Kuźniak,Bernhard Lauss,T. Lefort,Y. Lemière,A. Mtchedlishvili,Oscar Naviliat-Cuncic,J. M. Pendlebury,M. Perkowski,E. Pierre,E. Pierre,Florian M. Piegsa,Guillaume Pignol,P. N. Prashanth,G. Quéméner,D. Rebreyend,D. Ries,S. Roccia,P. Schmidt-Wellenburg,Allard Schnabel,Nathal Severijns,D. Shiers,K. F. Smith,Jens-Uwe Voigt,Antoine Weis,G. Wyszynski,G. Wyszynski,Jacek Zejma,J. Zenner,J. Zenner,J. Zenner,Geza Zsigmond +67 more
TL;DR: In this article, the neutron gyromagnetic ratio has been measured relative to that of the 199Hg atom with an uncertainty of 0.8 ppm using an apparatus where ultracold neutrons and mercury atoms are stored in the same volume and report the result γn/γHg=3.8424574(30).
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
Observation of Gravitationally Induced Vertical Striation of Polarized Ultracold Neutrons by Spin-Echo Spectroscopy
S. Afach,N. J. Ayres,G. Ban,Georg Bison,Kazimierz Bodek,Z. Chowdhuri,M. Daum,Martin Fertl,B. Franke,W. C. Griffith,Zoran D. Grujić,Philip Harris,Werner Heil,V. Hélaine,Malgorzata Kasprzak,Y. Kermaidic,Klaus Kirch,Paul E. Knowles,H.-C. Koch,S. Komposch,A. Kozela,J. Krempel,Bernhard Lauss,T. Lefort,Y. Lemière,A. Mtchedlishvili,M. Musgrave,Oscar Naviliat-Cuncic,J. M. Pendlebury,Florian M. Piegsa,Guillaume Pignol,C. Plonka-Spehr,P. N. Prashanth,G. Quéméner,M. Rawlik,D. Rebreyend,D. Ries,S. Roccia,D. Rozpedzik,Philipp Schmidt-Wellenburg,Nathal Severijns,J. A. Thorne,Antoine Weis,E. Wursten,G. Wyszynski,Jacek Zejma,J. Zenner,Geza Zsigmond +47 more
TL;DR: The method takes advantage of the relative dephasing of spins arising from a gravitationally induced striation of stored UCNs of different energies, and also permits an improved determination of the vertical magnetic-field gradient with an exceptional accuracy of 1.1 pT/cm.