Magnetically shielded container

Details Magnetically shielded container Magnetically shielded container

2007-02-13

2007-02-13

Reichard, Dean A. (Department: 2831)

Electricity: conductors and insulators

Anti-inductive structures

Shielded

C250S515100, C324S318000

Reexamination Certificate

active

09509317

ABSTRACT:
The invention provides a magnetically shielded container (1) having disposed in parallel opposed position on an axis (S) thereof magnetic field homogenizing pole shoes (10.1, 10.2), having disposed about said pole shoes a magnetically shielded yoke (2), said pole shoes and yoke enclosing a magnetic chamber (26), said container further comprising magnetic field sources (2.4, 2.5) disposed about and radially distanced from said axis whereby there exists within said chamber substantially homogenous magnetic field Booriented in the direction of said axis and whereby there is a usable volume within said chamber where the ratio of the magnetic field gradient in the direction transverse to said axis to said magnetic field Bohas a value of no more than 1.5×10−3/cm. By virtue of the very low ratio of weight to volume that is achievable with this construction, the containers according to the invention are economical to produce and especially suited to transporting polarized gasses.

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M. Ebert et al., “Nuclear magnetic resonance imaging with hyperpolarized helium-3”, May 11, 1996, vol. 347, pp. 1297-1299.

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