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.

Solar energy converter with waste heat engine

Abstract: A solar energy converter uses gallium arsenide photovoltaic cells to convert light to direct current. Optical concentrators reduce the needed area of cells. Gallium arsenide retains high conversion efficiency up to several hundred degrees, so the waste heat may be used to produce mechanical power in a Rankine cycle engine.

Regulated dc to dc converter

Abstract: A DC-DC converter includes first and second switches to be opened and closed at mutually exclusive times at a predetermined frequency. The first switch is connected to an inductor and a transformer primary winding so that a first current component from a DC input supply flows through it via the inductor. A second current component having a sinusoid component flows through the first switch in response to discharge of energy stored in a resonant circuit coupled to the transformer. The second component begins approximately simultaneously with closure of the first switch. The second switch, when closed, is connected so that a bidirectional current component flows through it in response to energy stored in the inductor. The rectifier is connected between the secondary winding and the load so the secondary winding supplies substantial current to the load.

Reduced glare scanner

Abstract: Method and apparatus for reduced glare observation of the eye fundus through optical lenses is accomplished by synchronized scanning illumination and observation of successive portions of the fundus. The scanning is conducted in rapid cycles to obtain continuous observation of the fundus and to provide for reduced glare photographs thereof.

Paramagnetic resonance in triplet naphthalene at liquid helium temperatures

Abstract: In order to determine the absolute signs of the zero field splittings of the photo-excited triplet state of dilute naphthalene in durene, we have made electron spin resonance measurements at 4·2°k and 1·65°k, where Boltzmann populations differ sufficiently to cause measurable intensity effects. Our results confirm the theoretical predictions: Z is negative; X and Y are positive. We have also measured decay times of the triplet state at helium temperatures and have found no marked departure from the behaviour at 77°k. We have observed some further resolution in the hyperfine structure at 1·65°k.