Electron gun for heating, melting and vaporizing purposes, with deflection systems
AssigneeLeybold-Heraeus GmbH
InventorsPeter Sommerkamp, Walter Heil
Life of this patent
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Abstract
Electron gun for heating, melting and vaporizing purposes having an electron-emitting cathode, at least one beam-forming electrode associated with the cathode, an accelerating anode, an electromagnetic lens and a beam guiding-tube extending in the direction of the beam path and surrounded by an electromagnetic deflection system for the x-axis deflection and one for the y-axis deflection. An envelope tube is disposed outside of the deflection systems and is joined at its extremity to the end of the beam guiding tube by an end plate through which the pole shoes of the x-axis deflection system are brought. The end plate is inclined towards the cathode beginning from the pole shoes of the x-axis deflection system.
Claims8
In an electron gun for heating, melting and vaporizing purposes having electron-emitting cathode means, at least one beam-forming electrode means associated with the cathode means, accelerating anode means, electromagnetic lens means and beam guiding-tube means extending in the direction of the beam path and surrounded by electromagnetic deflection systems for x-axis deflection and for y-axis deflection, envelope tube means disposed outside of the deflection systems and being joined at its extremity to the end of the beam guiding tube means by end plate means through which pole shoe means of the x-axis deflection system are brought, the improvement which comprises inclining the end plate means towards the cathode means beginning from the pole shoe means of the x-axis deflection system.
Dependencies are inferred from the claim text.