Ion beam (IB) guns and electron beam (EB) guns are devices that emit charged particles (ions and electrons, respectively) directed in a beam which are used in surface analysis or preparation, particle ...

A beam of electrons is produced at the top of the microscope by an electron gun. The electron beam follows a vertical path through the microscope, which is held within a vacuum. The beam travels ...

A vacuum provides the needed insulation to prevent "arching" or jumping of high voltages in the electron gun. The gun itself is under extremely high vacuum conditions, requiring a pressure as low as ...

The new instrument, a JEOL JXA-8230 equipped with LaB6 electron gun, was installed in March 2016, and has been fully operational and open to internal and external users since September 2016.

The tube has graphite and aluminum foils mounted on a grid between the electron gun and the screen of the tube. The path of the electron beam may be varied so that the beam passes through one of the ...

requiring at the minimum only an electron gun, a phosphor screen, and a clean surface. Its interpretation, however, is complicated by an unusually asymmetric scattering geometry and by the necessity ...

At the top is the electron gun, which emits a focused electron beam that strikes the specimen. The specimen, typically a crystalline material, is mounted at a specific angle to optimize the ...