Reduction of time-varying nanotesla magnetic fields from electric power lines by twisting.
Time-varying magnetic fields generated by electrical power lines in the laboratory can disturb electron microscope imaging. Modern microscopes require these fields to be below 10 nT [2]. We calculated and measured magnetic fields from straight and twisted current-carrying wires, and show that without twisting, this value cannot be reached.
Been
Auke J
AJ
MESA+ and Impact Research Institutes, University of Twente, AE Enschede, The Netherlands.
Folkertsma
Gerrit A
GA
Verputten
Hein H J
HH
Bolhuis
Thijs
T
Abelmann
Leon
L