Magnetic lens arrangement for corpuscular radiation equipment wo

Details Magnetic lens arrangement for corpuscular radiation equipment wo Magnetic lens arrangement for corpuscular radiation equipment wo

1978-03-30

1980-06-24

Anderson, Bruce C.

Radiant energy

With charged particle beam deflection or focussing

Magnetic lens

250398, H01J 3700

Patent

active

042097010

ABSTRACT:
A magnetic lens arrangement for corpuscular radiation equipment working under a vacuum, in particular an objective lens for high voltage electron microscopes, which permits having objects to be examined disposed in a vacuum chamber at room temperature, is achieved by an arrangement which includes a vacuum chamber having a lens coil winding, a superconductive shielding device which is of cup-shaped design and encloses the winding, two superconductive shielding cylinders disposed one behind the other with mutual spacing enclosed by the winding, with a vacuum chamber for the object to be examined disposed in front of the open side of the shielding device and the first shielding cylinder.

REFERENCES:
patent: 3008044 (1961-11-01), Buchhold
patent: 3351754 (1967-11-01), Dietrich et al.
patent: 3821554 (1974-06-01), Zerbst et al.

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