Abstract: An evacuated envelope has a rectangular display section and a gun section at one edge of the display section. The display section includes front and back walls which are generally rectangular, in closed spaced, parallel relation, and a plurality of spaced, parallel support walls between the front and back walls forming a plurality of parallel channels. The gun section extends across one end of the channels and includes therein gun structure which will direct electrons into the channels. In each of the channels is a beam guide which confines the electrons in a beam and guides the beam along the length of the channel. The beam guide also includes means for selectively deflecting the electron beam out of the guide at selective points along the guide so that the beam will impinge upon a phosphor screen along the inner surface of the front wall.

Abstract: An evacuated envelope has a rectangular display section and a gun section at one side of the display section. The display section includes rectangular front and back walls in closely spaced, substantially parallel relation, and a plurality of spaced, substantially parallel support walls between the front and back walls forming a plurality of parallel channels. The gun section extends across one end of the channels and includes gun structure which will selectively direct one or more electron beams along each of the channels. In each of the channels is a beam guide which confines the electrons of the beam but permits selective deflection of the electron beam out of the guide toward a phosphor screen on the inner surface of the front wall. The beam guide includes spaced, parallel conductors on the inner surface of the back wall extending transversely across the channels and a plurality of electrodes on the surfaces of walls which extend from the back wall toward the front wall.

Abstract: An evacuated envelope includes spaced, substantially parallel front and back walls, and a plurality of spaced, parallel supports between the front and back walls and forming a plurality of channels. A gun structure at one end of the channels directs at least one beam of electrons along each channel. In each of the channels is at least one beam focusing guide which confines the electrons in the beams but allows the beam to be selectively deflected out of the guide toward a phosphor screen on the inner surface of the front wall. Each of the focusing guides includes spaced walls between which the electron beam passes. Between the gun structure and each of the focusing guides is a beam clean-up section. The beam clean-up section serves to remove from the beam those electrons whose position and velocity vector are such that they would impinge on a wall of its focusing guide during the travel of the electron along the guide.

Abstract: An optical gaussmeter for determining the magnitude and homogeneity of the magnetic field in the core of a superconducting magnet includes a crystal of calcium fluoride doped with divalent thulium disposed in the core of the magnet. The crystal is exposed to RF radiation and to a narrow beam of light filtered to a wavelength corresponding to the absorption band of the divalent thulium in the crystal. The light beam signal as altered by the absorption characteristics of the crystal corresponds to the measured magnet current which manifests the field magnitude to be determined.

Abstract: An evacuated envelope has a rectangular display section and a gun section at one edge of the display section. The display section includes front and back walls which are generally rectangular, in closely spaced, parallel relation, and a plurality of spaced, parallel support walls between the front and back walls forming a plurality of parallel channels. The gun section extends across one end of the channels and includes therein gun structure which will direct electrons into the channels. In each of the channels is a beam guide which confines the electrons in a beam and guides the beam along the length of the channel. The beam guide also includes means for selectively deflecting the electron beam out of the guide at selective points along the guide so that beam will impinge upon a phosphor screen along the inner surface of the front wall.