Traveling wave deflector for electron beams
AssigneeTektronix, Inc.
InventorsAlvin Benson Christie, Ronald Eugene Correll
Life of this patent
Estimating the term…
Abstract
A broadband electron beam deflection apparatus particularly for a tube in which its electron beam can be focused, varied in position and varied in intensity, consisting in the form of a pair of helices each having a flat surface adjacent to the optical axis of the electron beam and also being precisely maintained in a diverging direction to such axis over the length thereof is provided. The apparatus consists of two individual helix assemblies each composed of separate components combined into a single unit in a manner whereby symmetry and desired characteristic impedance is controlled by the dimensions of the helix and having an end-to-end propagation time equal to the electron beam velocity due to the pitch and circumference of the helix.
Claims7
A traveling wave deflector for deflecting an electron beam emitted from a source of electrons, comprising:
- a pair of helical deflection members, each of said members having a plurality of spaced and substantially flat conductive ribbon turns positioned along and spaced relative to an axis of the electron beam and on opposite sides thereof;
- a ground member disposed in coaxial relationship inside each of said helical deflection members and being supported in spaced relationship thereto;
- and
- means for insulatively supporting said ground member and said deflection members in said spaced relationship, said means disposed inside each of said helical deflection members.
An electronic scanning device, comprising:
- an evacuated envelope;
- an electron gun including electron emissive means and forming means positioned in one end of said envelope for projecting a beam of electrons;
- electron collecting means positioned at the opposite end of said envelope;
- and
- deflection means positioned between said electron gun and said electron collecting means for deflecting said beam of electrons, said deflection means including a traveling wave deflector having a pair of helical deflection members each having a plurality of spaced and substantially flat conductive ribbon turns positioned along and spaced relative to an axis of the electron beam and on opposite sides thereof, a ground member disposed in coaxial relationship inside each of said deflection members and being supported in spaced relationship thereto, and means for insulatively supporting said ground member and said deflection members in said spaced relationship, said means disposed inside each of said helical deflection members.
Dependencies are inferred from the claim text.