Radiant energy – With charged particle beam deflection or focussing – Magnetic lens
Patent
1991-11-27
1993-03-30
Anderson, Bruce C.
Radiant energy
With charged particle beam deflection or focussing
Magnetic lens
250396R, H01J 3714
Patent
active
051986744
ABSTRACT:
The apparatus of the present invention selects from particles emitted by a radioactive source those particles having momentum within a desired range and focuses the selected particles in a beam having at least one narrow cross-dimension, and at the same time attenuates potentially disruptive gamma rays and low energy particles. Two major components of the present invention are an achromatic bending and focusing system, which includes sector magnets and quadrupole, and a quadrupole doublet final focus system. Permanent magnets utilized in the apparatus are constructed of a ceramic (ferrite) material which is inexpensive and easily machined.
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Anderson Bruce C.
Cordell Helen S.
Fisher Robert J.
Moser William R.
The United States of America as represented by the United States
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