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Title: Dynamic stabilization of the magnetic field surrounding the neutron electric dipole moment spectrometer at the Paul Scherrer Institute
Authors: Afach, S ×
Bison, G
Bodek, K
Burri, F
Chowdhuri, Z
Daum, M
Fertl, M
Franke, B
Grujic, Z
Helaine, V
Henneck, R
Kasprzak, M
Kirch, K
Koch, H. -C
Kozela, A
Krempel, J
Lauss, B
Lefort, T
Lemiere, Y
Meier, M
Naviliat-Cuncic, O
Piegsa, F. M
Pignol, G
Plonka-Spehr, C
Prashanth, P. N
Quemener, G
Rebreyend, D
Roccia, S
Schmidt-Wellenburg, P
Schnabel, A
Severijns, Nathal
Weis, A
Wyszynski, G
Zejma, J
Zenner, J
Zsigmond, G #
Voigt, J #
Issue Date: 2014
Publisher: American Institute of Physics
Series Title: Journal of Applied Physics vol:116 issue:8
Article number: 084510 (14 pages)
Abstract: The Surrounding Field Compensation (SFC) system described in this work is installed around the
four-layer Mu-metal magnetic shield of the neutron electric dipole moment spectrometer located at
the Paul Scherrer Institute. The SFC system reduces the DC component of the external magnetic field
by a factor of about 20. Within a control volume of approximately 2.5m2.5m3m, disturbances
of the magnetic field are attenuated by factors of 5–50 at a bandwidth from 103 Hz up to 0.5Hz,
which corresponds to integration times longer than several hundreds of seconds and represent the important
timescale for the neutron electric dipole moment measurement. These shielding factors apply
to random environmental noise from arbitrary sources. This is achieved via a proportional-integral
feedback stabilization system that includes a regularized pseudoinverse matrix of proportionality factors
which correlates magnetic field changes at all sensor positions to current changes in the SFC
coils.
ISSN: 0021-8979
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Nuclear and Radiation Physics Section
× corresponding author
# (joint) last author

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