High voltage electron beam gun
AssigneeFerranti Sciaky, Inc.
InventorsTimothy J. Haynie, Glen S. Lawrence
Life of this patent
Estimating the term…
Abstract
An electron beam gun for operation from 100 to 200 kilovolts which includes means for maintaining the alignment and spacing of critical gun elements over the wide range of temperatures experienced during operation of the gun and which allows for ease in changing filaments and ease in dismantling the gun for servicing. Means are provided for the safe handling of the gun when this is requires while the gun is mounted on a machine. The gun is provided with a novel filament and cathode support cartridge assembly of simple design. A quick access door assembly allows quick and easy access to the guns internal parts and insures positive vacuum sealing.
Claims10
An electron beam gun for operation at voltages from 100 to 200 kilovolts comprising;
- a cylindrical gun housing, (1) a pumping manifold mounted above the said gun housing, a hollow elongated cylindrical insulator (3) supported at one end by said pumping manifold concentrically within said gun housing, a cartridge feed-through (21) mounted at the opposite end of said insulator, a cartridge head assembly mounted within the said cartridge feed-through, the said head assembly consisting of a filament holder assembly (6) which includes a cathode electrode (18) insulated from a filament holder (40) and means (34) for connecting said filament holder to terminals (37) on the said cartridge head assembly, an anode mount supporting an anode (7) in close proximity to the said cathode electrode;
- an alignment coil supported below the anode, means including a receptacle for supplying electric current to the filament, means for supplying to and retaining oil within the cathode insulator, pumping means, (14) for evacuating the gun, mounted on the pumping manifold, safety switch means for grounding the gun parts to the housing and an access door assembly mounted on said housing.
Dependencies are inferred from the claim text.