Magnetic field screens

Details Magnetic field screens Magnetic field screens

1989-04-14

1990-12-18

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

335216, G01R 3320

Patent

active

049789201

ABSTRACT:
The screen is provided by surrounding the coil producing the magnetic field with a set of electrical conductors the currents within the conductors being controlled in such a manner that the field is neutrailized in a specific region of space, the current distribution within the conductors being determined by calculating the current within a hypothetical superconductive shield which would have the effect of neutrailizing the field, the current through the conductors thereby being a substitute for the superconductive shield.

REFERENCES:
patent: 3466499 (1969-09-01), Beth
patent: 3493904 (1970-02-01), Favereau
patent: 3671902 (1972-06-01), Westendorp
patent: 4595899 (1986-06-01), Smith et al.
patent: 4612505 (1986-09-01), Zijlstra
patent: 4646045 (1987-02-01), Chari et al.
patent: 4646046 (1987-02-01), Vavrek et al.
patent: 4733189 (1988-03-01), Punchard
patent: 4737716 (1988-04-01), Roemer

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