G - Physics – 01 – R
Patent
G - Physics
01
R
G01R 33/44 (2006.01) G01N 24/08 (2006.01) G01R 33/022 (2006.01) G01R 33/32 (2006.01) G01R 33/343 (2006.01) H01F 5/00 (2006.01)
Patent
CA 2325492
A noise immuned gradiometer split shield coil for use in magnetic resonance detection, such as in Nuclear Magnetic Resonance (NMR) and Nuclear Quadrupole Resonance (NQR). The coil is formed by a transmission line (50) configured as a magnetic field gradiometer. The transmission line has a conductor (58) which is electrically continuous through the coil, and a shield (60) which is split (56) at a position that causes the gradiometer to be electrically balanced. In this manner, the coil provides a high degree of internal shielding to reduce the effect of environmental noise pick-up. Such coils are also less sensitive to the effects of nearby conducting media.
L'invention concerne une bobine de gradiomètre à blindage fendu, blindée contre le bruit et destinée à être utilisée pour la détection à résonance magnétique, notamment la résonance magnétique nucléaire et la résonance quadripolaire nucléaire. La bobine est formée par une ligne (50) d'émission configurée comme un gradiomètre de champ magnétique. La ligne d'émission comporte un conducteur (58), sélectivement continu dans la traversée de la bobine, et un blindage (60) qui est fendu (56) au niveau d'une position provoquant l'équilibre électrique du gradiomètre. Ainsi, la bobine présente un degré élevé de blindage interne, réduisant ainsi l'effet du captage du bruit ambiant. De telles bobines sont également moins sensibles aux effets de supports conducteurs à proximité immédiate.
Garroway Allen N.
Miller Joel B.
Suits Bryan H.
Battison Williams Dupuis
The Government Of The United States Of America As Represented By The Se Cretary Of The Navy
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