Reduction of time-varying nanotesla magnetic fields from electric power lines by twisting

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 withou...

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Veröffentlicht in:Journal of electron microscopy 2009-08, Vol.58 (4), p.251-252
Hauptverfasser: Been, Auke J., Folkertsma, Gerrit A., Verputten, Hein H.J., Bolhuis, Thijs, Abelmann, Leon
Format: Artikel
Sprache:eng
Schlagworte:
calculations
disturbance
electric circuitry
Electric currents
Electron microscopes
electron microscopy
instrumentation
Laboratories
Magnetic fields
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Zusammenfassung: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.
ISSN:0022-0744
1477-9986
2050-5701
DOI:10.1093/jmicro/dfp002