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.

Phonon anomalies at the magnetic phase transition in SrRuO3.

Abstract: Raman spectra of ${\mathrm{SrRuO}}_{3}$ films grown epitaxially on ${\mathrm{LaAlO}}_{3}$ substrate by a pulsed laser deposition have been measured Phonon spectra showed an anomalous temperature dependence in the range of the magnetic phase transition indicating strong spin-lattice interaction No sharp magnon lines were observed, but the broad continuum spectrum showed redistribution of intensity at the magnetic phase transition suggesting that multimagnon processes may contribute to the continuum

Epitaxial indium-gallium-arsenide phosphide layer on lattice-matched indium-phosphide substrate and devices

Abstract: An epitaxial layer of a quaternary III-V alloy of Ga, In, As, and P has its constituents proportioned for lattice matching to a substrate having a lattice constant falling within the range of 5.45 to 6.05 A. In addition, the constituents of the alloy are proportioned to provide a selected bandgap energy falling within the range of 2.23 to 0.35 electron volts; this corresponds to wavelengths of 0.55 to 3.5 microns. Near perfect lattice matched heterojunctions are provided between the epitaxial layer and the lattice matched substrate; these are useful for providing improved photocathodes and lasers, particularly in the infrared range of wavelengths between 0.8 and 2.0 microns.

Standing wave linear accelerator having non-resonant side cavity

Abstract: A linear accelerator includes cascaded standing wave main cavities with approximately the same resonant frequency and plural side cavities. A charged particle beam travels longitudinally through the main cavities. An electromagnetic wave excites the cavities with a frequency that is approximately the same as the resonant frequency of the main cavities. There is normally a fixed electromagnetic energy phase shift in adjacent main cavities. The resonant frequency of at least one side cavity is adjusted so it differs from the electromagnetic wave frequency. The detuned side cavity resonant frequency causes: (a) a change in the normal fixed phase shift of the main cavities adjacent the one side cavity and (b) a decrease in electric field strength in cavities electromagnetically downstream of the one side cavity relative to the electric field strength in cavities electromagnetically upstream of the one side cavity. In different embodiments, the electromagnetic wave is injected into a cavity where the particle beam is upstream and downstream of the one side cavity, respectively.

High power x-ray tube

Abstract: An X-ray tube with a metal window and having increased power loading capabilities without undesirable overheating of the window, this being achieved by the use of a magnet which is arranged so that magnetic field lines pass over the window surface to reduce bombardment of the window with secondary or back-scattered electrons from the anode.

Quadrupole trap improved technique for ion isolation

Abstract: A method for isolating an ion in a QIT (1) employing values from a mass axis calibration chart to establish the maximum DAC value to scan to in order to scan out m(p)-1 and less during ramp up of RF trapping field while applying a specifically selected fixed supplemental frequency applied during said calibration; and employing values from the calibration curve to establish the DAC value to scan out m(p)+1 and greater during ramping down of RF trapping field, while applying a previously determined fixed broadband spectrum to the QIT end caps.