Gaussmeter
AssigneeRCA Corporation
InventorsEdward Stephen Sabisky, Charles Hammond Anderson
Life of this patent
Estimating the term…
Abstract
An optical gaussmeter for determining the magnitude and homogeneity of the magnetic field in the core of a superconducting magnet includes a crystal of calcium fluoride doped with divalent thulium disposed in the core of the magnet. The crystal is exposed to RF radiation and to a narrow beam of light filtered to a wavelength corresponding to the absorption band of the divalent thulium in the crystal. The light beam signal as altered by the absorption characteristics of the crystal corresponds to the measured magnet current which manifests the field magnitude to be determined.
Claims11
A gaussmeter comprising:
- means for providing an input beam of electromagnetic radiation of relatively restricted cross-section and having a bandwidth in the visible spectrum,
- electromagnetic radiation transmission means including a crystal adapted to be disposed in a magnetic field whose magnitude is to be determined, said crystal being responsive to said beam impinging thereon for producing an output beam of radiation manifesting the magnitude of said magnetic field,
- positioning means coupled to said beam providing means for locating said beam at a given position on a portion of said crystal in said magnetic field, and
- radiation processing means responsive to said output beam applied as an input thereto for producing as an output thereof a signal representing said magnetic field magnitude at said given position.
An optical gaussmeter comprising:
- a crystal disposed in the magnetic field whose intensity is to be measured, said crystal having the property, when illuminated by light, of absorbing a portion of said light when the magnetic field is of a particular intensity,
- means for producing a light beam of relatively small cross-sectional area compared to the area of a face of said crystal,
- means for directing said light beam to any one of a number of locations, each of restricted size, on said face of said crystal, and
- light detecting means disposed to receive the portion of said beam which passes through said crystal for providing an output signal representing the magnitude of said magnetic field at the location illuminated by said beam.
A gaussmeter comprising:
- means for providing an input beam of electromagnetic radiation,
- electromagnetic radiation transmission means adapted to be disposed in a magnetic field to be determined, said transmission means being responsive to said beam impinging thereon for providing an output beam of radiation manifesting the magnitude of said magnetic field, said transmission means including a CaF.sub.2 crystal doped with T.sub.m.sup.2+ for receiving said input beam and for producing said output beam, and radiation generating means coupled to said transmission means for exposing said CaF.sub.2 crystal to radio frequency radiation,
- positioning means coupled to said beam providing means for locating said beam at a given position in said magnetic field, and
- radiation processing means responsive to said output beam applied as an input thereto for producing as an output thereof a signal representing said magnetic field magnitude at said given position.
Dependencies are inferred from the claim text.