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    Wyświetlanie 1-3 z 3
    Tytuł:
    A large 'Active Magnetic Shield' for a high-precision experiment
    Autorzy:
    Virot, R.
    Lefort, T.
    Rienäcker, I.
    Piegsa, F. M.
    Daum, M.
    Bouillaud, T.
    Kirch, K.
    Rawlik, M.
    Severijns, N.
    Rozpędzik, Dagmara
    Mullan, P.
    Naviliat-Cuncic, O.
    Zejma, Jacek
    Ban, G.
    Emmenegger, S.
    Bondar, V.
    Bison, G.
    Fertl, M.
    Fratangelo, A.
    Roccia, S.
    Doorenbos, C. B.
    Chiu, P. -J.
    Chen, J.
    Ries, D.
    Shelton, T.
    Yazdandoost, N.
    Zsigmond, G.
    Pignol, G.
    Chen, W.
    Kletzl, V.
    Ayres, N. J.
    Schnabel, A.
    Griffith, W. C.
    Schmidt-Wellenburg, P.
    Bodek, Kazimierz
    Lauss, B.
    Abel, C.
    Grujic, Z. D.
    Segarra, E. P.
    Tavakoli Dinani, R.
    Harris, P.
    Svirina, K.
    Koss, P. A.
    Ferraris-Bouchez, L.
    Saenz-Arevalo, W.
    Thorne, J.
    Pais, D.
    Ziehl, N.
    Crawford, C. B.
    Chanel, E.
    Krempel, J.
    Opis:
    We present a novel Active Magnetic Shield (AMS), designed and implemented for the n2EDM experiment at the Paul Scherrer Institute. The experiment will perform a high-sensitivity search for the electric dipole moment of the neutron. Magnetic-field stability and control is of key importance for n2EDM. A large, cubic, 5 m side length, magnetically shielded room (MSR) provides a passive, quasi-static shielding-factor of about 10$^{5}$ for its inner sensitive volume. The AMS consists of a system of eight complex, feedback-controlled compensation coils constructed on an irregular grid spanned on a volume of less than 1000 m$^{3}$ around the MSR. The AMS is designed to provide a stable and uniform magnetic-field environment around the MSR, while being reasonably compact. The system can compensate static and variable magnetic fields up to $\pm$ 50μT (homogeneous components) and $\pm$ 5μT/m (first-order gradients), suppressing them to a few μT in the sub-Hertz frequency range. The presented design concept and implementation of the AMS fulfills the requirements of the n2EDM experiment and can be useful for other applications, where magnetically silent environments are important and spatial constraints inhibit simpler geometrical solutions.
    Dostawca treści:
    Repozytorium Uniwersytetu Jagiellońskiego
    Artykuł
    Tytuł:
    Achieving ultra-low and -uniform residual magnetic fields in a very large magnetically shielded room for fundamental physics experiments
    Autorzy:
    Bowles, D.
    Lejuez, A.
    Lefort, T.
    Li, R.
    Rienäcker, I.
    Piegsa, F. M.
    Pacura, Sebastian
    Bouillaud, T.
    Kirch, K.
    Rebreyend, D.
    Severijns, N.
    Rozpędzik, Dagmara
    Mullan, P.
    Naviliat-Cuncic, O.
    Harris, P. G.
    Ban, G.
    Zejma, Jacek
    Emmenegger, S.
    Chiu, P.-J.
    Bondar, V.
    Bison, G.
    Fertl, M.
    Fratangelo, A.
    Roccia, S.
    Doorenbos, C. B.
    Yazdandoost, N.
    Ries, D.
    Zsigmond, G.
    Crawford, C. B.
    Pignol, G.
    Chen, W.
    Kletzl, V.
    Ayres, N. J.
    Schnabel, A.
    Griffith, W. C.
    Vankeirsbilck, J.
    Schmidt-Wellenburg, P.
    Bodek, Kazimierz
    Lauss, B.
    Tavakoli Dinani, R.
    Grujic, Z. D.
    Segarra, E. P.
    Svirina, K.
    Voigt, J.
    Saenz-Arevalo, W.
    Thorne, J.
    Pais, D.
    Ziehl, N.
    Chanel, E.
    Krempel, J.
    Opis:
    High-precision searches for an electric dipole moment of the neutron (nEDM) require stable and uniform magnetic field environments. We present the recent achievements of degaussing and equilibrating the magnetically shielded room (MSR) for the n2EDM experiment at the Paul Scherrer Institute. We present the final degaussing configuration that will be used for n2EDM after numerous studies. The optimized procedure results in a residual magnetic field that has been reduced by a factor of two. The ultra-low field is achieved with the full magnetic-field-coil system, and a large vacuum vessel installed, both in the MSR. In the inner volume of $\sim$ 1.4 m$^{3}$, the field is now more uniform and below 300 pT. In addition, the procedure is faster and dissipates less heat into the magnetic environment, which in turn, reduces its thermal relaxation time from 12h down to 1.5h.
    Dostawca treści:
    Repozytorium Uniwersytetu Jagiellońskiego
    Artykuł
    Tytuł:
    Generating a highly uniform magnetic field inside the magnetically shielded room of the n2EDM experiment
    Autorzy:
    Virot, R.
    Lejuez, A.
    Grujic, Z.
    Lefort, T.
    Li, R.
    Piegsa, F. M.
    Wursten, E.
    Dechenaux, B.
    Bouillaud, T.
    Kirch, K.
    Rawlik, M.
    Rebreyend, D.
    Severijns, N.
    Rozpędzik, Dagmara
    Rienaecker, I.
    Mullan, P.
    Naviliat-Cuncic, O.
    Flaux, P.
    Ban, G.
    Zejma, Jacek
    Emmenegger, S.
    Chiu, P.-J.
    Crawford, C.
    Bondar, V.
    Bison, G.
    Fertl, M.
    Fratangelo, A.
    Meier, M.
    Roccia, S.
    Quemener, G.
    Doorenbos, C. B.
    Menu, J.
    Michielsen, K.
    Ries, D.
    Yazdandoost, N.
    Zsigmond, G.
    Smith, C. A.
    Touati, S.
    Pignol, G.
    Chen, W.
    Kletzl, V.
    Ayres, N. J.
    Mullins, A.
    Schnabel, A.
    Griffith, W. C.
    Komposch, S. V.
    Vankeirsbilck, J.
    Schmidt-Wellenburg, P.
    Bodek, Kazimierz
    Kasprzak, M.
    Lauss, B.
    Abel, C.
    Segarra, E. P.
    Goupillière, D.
    Svirina, K.
    Bowles, D. C.
    Voigt, J.
    Höhl, D.
    Koss, P. A.
    Tavakoli, R.
    Ferraris-Bouchez, L.
    Thorne, J.
    Pais, D.
    Caratsch, G. L.
    Ziehl, N.
    Chanel, E.
    Krempel, J.
    Opis:
    We present a coil system designed to generate a highly uniform magnetic field for the n2EDM experiment at the Paul Scherrer Institute. It consists of a main $B_{0}$ coil and a set of auxiliary coils mounted on a cubic structure with a side length of 273 cm, inside a large magnetically shielded room (MSR). We have assembled this system and characterized its performances with a mapping robot. The apparatus is able to generate a 1 $\mu$ T vertical field with a relative root mean square deviation $\sigma(B_{z}) / B_{z} = 3 \times 10^{-5}$ over the volume of interest, a cylinder of radius 40 cm and height 30 cm. This level of uniformity overcomes the n2EDM requirements, allowing a measurement of the neutron Electric Dipole Moment with a sensitivity better than $1 \times 10^{-27}e$ cm.
    Dostawca treści:
    Repozytorium Uniwersytetu Jagiellońskiego
    Artykuł
      Wyświetlanie 1-3 z 3

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