Schlumberger Technologies, Inc.

Allan I Rubin

Paul J Duval

Neal T Sullivan

Vladimir Vayner

Ira Rosenberg

A magnetic lens focuses a charged particle beam generated by an instrument to a very small spot for deriving characteristics of a sample. The magnetic flux pattern is created by splitting the winding coil into a primary coil and a secondary coil. This enables faster adjustment of the magnetic flux, and with improved resolution.

Split magnetic lens for controlling a charged particle beam

A charged particle filter such as a Wien filter in which components used as the pole pieces and electrodes are precisely and reliably secured to a supporting structure through which they extend and to which they are brazed. Electrical insulating gaps in the magnetic circuit are located very remotely from the pole faces of the pole pieces so as to minimize any adverse effect of the gaps on the produced magnetic field.

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Concord, MA, United States of America

Allan I Rubin