Varian Associates

About: Varian Associates is a based out in . It is known for research contribution in the topics: Beam (structure) & Wafer. The organization has 2160 authors who have published 2591 publications receiving 46002 citations.

Tungsten-iridium impregnated cathode

Abstract: Porous agglomerates (14) are made from pure tungsten by sintering fine particles together and mechnically breaking down the mass to form some agglomerates (14) considerably larger than the particles. These agglomerates (14) are mixed with fine iridium powder (18) and sintered to form a porous mass. The mass is machined to the cathode shapes (10') and impregnated with an alkaline earth aluminate (18). The large agglomerates (14) alloy with the iridium only on their outer surface. Their pure tungsten interior provides the surfaces to reduce the alkaline earth oxide to the metal which activates the cathode.

Solvent gradient generator for chromatography systems

Abstract: Solvent gradient generating apparatus in a liquid column chromatography system. A multi-compartment vessel having an input/output port pair for each compartment is coupled between a high pressure pump and the column cell for providing both gradient generation and pulse damping. A piston, which is slidably contained within the vessel, sealably provides the compartments. Means external to the vessel are provided for controlling the rate of movement of the piston within the vessel. The volume of each compartment is controlled by the position of the piston, and the rate of movement of the piston controls mixing of the solvent components delivered to the column cell. Each compartment has input and output ports. In one embodiment, both input ports are coupled to the high pressure pump while only one output port is coupled to the column cell. In another embodiment, only one input port is coupled to the pump and the other input port and one output port are sealed.

Method for making waveguide components

Abstract: Metallic sheet stock is stamped in accordance with certain predetermined patterns to derive members, some of which are bent to predetermined shapes, to define waveguide components which are utilized as components of microwave devices such as TR tubes. The stamped metal members are, in the case of cold rolled steel, copper plated and brazed together in a suitable jig structure to form the final composite microwave component, such as a TR tube. Waveguide flanges, iris structures, and waveguides are constructed in this manner.

In-line beam scanning system

Abstract: A system for scanning a beam of charged-particles across a target is described which compensates for energy dispersion in the beam. A time-varying magnet with circular pole pieces is used to sweep the beam left to right. Two wedge-shaped magnet dipoles, one on each side of the center line are used to bend the beam parallel to the center line and compensate for beam energy dispersion.