Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Patent
1988-07-27
1989-07-25
Levy, Stewart J.
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
324318, G01R 3320
Patent
active
048517801
ABSTRACT:
A test head for NMR spectrometers comprises an rf coil mounted on a carrier pipe and a shielding which extends over at least one section of two parallel conductors extending in the axial direction of the carrier pipe. In order to improve the effect of shielding, the shielding is connected, in an electrically conductive manner, to a turn section of the rf coil which contains a cold point. The shielding is thereby maintained at a fixed neutral potential, relative to the rf voltage supplied, with the result that no fields impairing the measuring accuracy and resolution of the spectrometer can any longer exist in the shielded area. The shielding may be connected directly to one turn section of the coil, for example by soldering.
REFERENCES:
patent: 3735246 (1973-05-01), Glenat et al.
patent: 4439733 (1984-03-01), Hinshaw et al.
patent: 4665368 (1987-05-01), Sugiyama et al.
patent: 4742304 (1988-05-01), Schnall et al.
Progress in NMR-Spectroscopy, vol. 12, 1978, pp. 41 to 77, D. I. Hoult: "The NMR Receiver: A Description and Analysis of Design".
Dejon Peter
Spraul Manfred
Bruker Analytische Messtechnik GmbH
Levy Stewart J.
O'Shea Kevin D.
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