Method for manipulation of diamagnetic objects in a low gravity

Details Method for manipulation of diamagnetic objects in a low gravity Method for manipulation of diamagnetic objects in a low gravity

1998-06-16

2000-12-19

Reifsnyder, David A.

Liquid purification or separation

Processes

Using magnetic force

210748, 95 28, 148103, 204557, 209212, B03C 100

Patent

active

061623644

ABSTRACT:
A method and system for diamagnetic manipulation of an object in a surrounding medium in a low gravity environment is provided. The system can be used in various applications such as containerless materials processing, protein crystal growth, and particulate filtering. If the application requires directional manipulation of the object, at least one magnet or electromagnet is required. The object is repulsed by the magnet if the object is more strongly diamagnetic than the surrounding medium. If the object is less diamagnetic than the surrounding medium, however, then the object is effectively attracted to the magnet. For an application that requires suspension of the object, two oppositely polarized magnets are used to generate an appropriate magnetic field gradient to suspend the object in a location where opposing field vectors generated by the two magnets cancel each other out, producing a net field strength of zero.

REFERENCES:
patent: 4027494 (1977-06-01), Flethcer et al.
patent: 4508615 (1985-04-01), Graham
patent: 5238547 (1993-08-01), Tsubouchi et al.
patent: 5366566 (1994-11-01), Tournier
Brian Tilloston and J. Houston, Diamagnetic Manipulation for Microgravity Processing, pp. 1-10, 1996.

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